View Full Version : "Straight" pipes
KILLSHOTS
04-21-2014, 01:06 AM
Hey guys,
LOVE my Z, but it's far too quiet with the stock exhaust. The '87 that I traded had only Magnaflow cats and no mufflers and I miss the sound. I rarely drive my car and when I do, I LOVE it loud! Guys on the other forum were bitching about how loud muffler eliminators were but I tried them anyway and LOVED them! Might have liked it louder, in fact.
So, I'm really set on a Corsa system but just I'm trying my best to be pragmatic and give proper consideration to different options before pulling the trigger. Wondering about just modifying my stock system by replacing the resonator with an X-pipe and deleting the mufflers altogether...just straight black LT-1 tips out the back. The only "mufflers" would be the cats, just like on my '87. I see very little potential for resonance with this setup. VERY, VERY inexpensive system, good return of HP, lots of sound.
Remember, I like to HEAR my car. If I want quiet, I drive my Camry.
Thoughts?
Thanks!
Chris
mike100
04-21-2014, 01:17 AM
I've spent more money on exhaust than everything else outside of the purchase price of the car. My custom headers back with all emissions gear and custom C6 NPP valve treatment and I'm still scheming to change the muffler type.
The quest for the perfect exhaust is a long one it seems. Looking for the 'Goldilocks' system I guess.
Kevin
04-21-2014, 06:46 AM
Go with headers x pipe and electric cut outs.
WVZR-1
04-21-2014, 08:47 AM
I've run cats only on earlier cars but never on an LT5. It would be a very inexpensive "experiment" and if done by a competent installer the "insert" be it an X or H or just pipes could be done with properly expanded pipe and clamped for the initial attempt. You could also maybe just use a couple "chambered" inserts. I believe the important aspect of the attempt is "properly expanded" pipes for the attempt, it would be very easy once you were happy to complete a welded install.
KILLSHOTS
04-21-2014, 10:11 AM
I've run cats only on earlier cars but never on an LT5. It would be a very inexpensive "experiment" and if done by a competent installer the "insert" be it an X or H or just pipes could be done with properly expanded pipe and clamped for the initial attempt. You could also maybe just use a couple "chambered" inserts. I believe the important aspect of the attempt is "properly expanded" pipes for the attempt, it would be very easy once you were happy to complete a welded install.
Thanks Dave...here you answered the question I asked in my email reply. Inexpensive was my thought, as well. If I don't like it, I go back in 3 to 6 months and do Corsa and headers and I'm only out a couple hundred. I appreciate your input!
mike100
04-21-2014, 11:34 AM
Just changing the resonator for an x-pipe increases the rumble a good bit and takes out about 1/2 the restriction on a stock system.
Hib Halverson
04-21-2014, 11:46 AM
An LT-5 with cats only and an X-pipe will sound awesome at high rpm but it will be seriously loud...basically one step short of open exhaust.
When you build the system, keep in mind that stock ZR-1 pipe is about 2.75-in. You're only going to find 2.5 and 3.0-pipe available through conventional sources so go to a 3" system. Given the choice, use an X-pipe rather than an H-pipe
For those liking loud or those who are partially deaf it will be delightful except for 1) exhaust going pop-popty-pop on decel and 2) the 1500-1800 rpm "drone" or "resonance" when cruising on the highway.
Lastly, you may need a different ECM cal to make that system work best and Haibeck has the best stuff.
KILLSHOTS
04-21-2014, 02:16 PM
An LT-5 with cats only and an X-pipe will sound awesome at high rpm but it will be seriously loud...basically one step short of open exhaust.
When you build the system, keep in mind that stock ZR-1 pipe is about 2.75-in. You're only going to find 2.5 and 3.0-pipe available through conventional sources so go to a 3" system. Given the choice, use an X-pipe rather than an H-pipe
For those liking loud or those who are partially deaf it will be delightful except for 1) exhaust going pop-popty-pop on decel and 2) the 1500-1800 rpm "drone" or "resonance" when cruising on the highway.
Lastly, you may need a different ECM cal to make that system work best and Haibeck has the best stuff.
Thanks Hib. I do have Marc's chip in my car currently...would it need to be recalibrated just to remove mufflers and resonator?
I appreciate the input!
Chris
KILLSHOTS
04-21-2014, 02:19 PM
Just changing the resonator for an x-pipe increases the rumble a good bit and takes out about 1/2 the restriction on a stock system.
Hey Mike,
I had actually thought about this as a potential "step 1". Will removing only the resonator lead to a big increase in drone?
Thanks!
Kevin
04-21-2014, 02:29 PM
Thanks Hib. I do have Marc's chip in my car currently...would it need to be recalibrated just to remove mufflers and resonator?
I appreciate the input!
Chris
it will get rid of the poping if you have Marc redo the chip
GOLDCYLON
04-21-2014, 02:35 PM
Hey guys,
LOVE my Z, but it's far too quiet with the stock exhaust. The '87 that I traded had only Magnaflow cats and no mufflers and I miss the sound. I rarely drive my car and when I do, I LOVE it loud! Guys on the other forum were bitching about how loud muffler eliminators were but I tried them anyway and LOVED them! Might have liked it louder, in fact.
So, I'm really set on a Corsa system but just I'm trying my best to be pragmatic and give proper consideration to different options before pulling the trigger. Wondering about just modifying my stock system by replacing the resonator with an X-pipe and deleting the mufflers altogether...just straight black LT-1 tips out the back. The only "mufflers" would be the cats, just like on my '87. I see very little potential for resonance with this setup. VERY, VERY inexpensive system, good return of HP, lots of sound.
Remember, I like to HEAR my car. If I want quiet, I drive my Camry.
Thoughts?
Thanks!
Chris
Well I have used Corsa resonator in the attic
GOLDCYLON
04-21-2014, 02:35 PM
Hey Mike,
I had actually thought about this as a potential "step 1". Will removing only the resonator lead to a big increase in drone?
Thanks!
Oh yeah
KILLSHOTS
04-21-2014, 02:36 PM
it will get rid of the poping if you have Marc redo the chip
Makes sense. Thanks Kevin.
KILLSHOTS
04-21-2014, 02:39 PM
Oh yeah
Thanks Daryll, figured that would be the case. Not gonna do the Corsa resonator at this point. I think I'm really looking to experiment with some "cheap sound" here for a while and then maybe 4 to 6 months down the road, I go full-boat: Corsas and SW headers with no cats.
Blue Flame Restorations
04-21-2014, 02:45 PM
I have old style B&B, Watsons, X pipe. 3". Very loud and drones on the highway. just need a good radio with an amp. :)
Tony Davila
04-21-2014, 04:42 PM
Hey guys,
LOVE my Z, but it's far too quiet with the stock exhaust. The '87 that I traded had only Magnaflow cats and no mufflers and I miss the sound. I rarely drive my car and when I do, I LOVE it loud! Guys on the other forum were bitching about how loud muffler eliminators were but I tried them anyway and LOVED them! Might have liked it louder, in fact.
So, I'm really set on a Corsa system but just I'm trying my best to be pragmatic and give proper consideration to different options before pulling the trigger. Wondering about just modifying my stock system by replacing the resonator with an X-pipe and deleting the mufflers altogether...just straight black LT-1 tips out the back. The only "mufflers" would be the cats, just like on my '87. I see very little potential for resonance with this setup. VERY, VERY inexpensive system, good return of HP, lots of sound.
Remember, I like to HEAR my car. If I want quiet, I drive my Camry.
Thoughts?
Thanks!
Chris
Chris, I know you have seen my exhaust cutout post, and thanks for the compliment.
Let me say that with the muffler by-passed it is freakin loud, open header loud. I just ordered some 18" Dynomax bullet mufflers to help quite it down a bit. System closed going through mufflers is super nice and quite, almost too quite. I think when the cutouts are open it is louder than normal mainly due to my HP upgrades.
-Watson headers, X-pipe and cutouts @442rwhp = loud
KILLSHOTS
04-21-2014, 04:53 PM
Thanks for the input, Tony. I really loved the sound of my L98 running through only cats but consensus seems to be that an LT5 through just cats would be "race car" loud. Leaning toward just replacing the resonator with an x-pipe for a while, then doing the entire exhaust (SW headers with no cats and Corsa) 6 months down the road.
Tony Davila
04-21-2014, 05:07 PM
Thanks for the input, Tony. I really loved the sound of my L98 running through only cats but consensus seems to be that an LT5 through just cats would be "race car" loud. Leaning toward just replacing the resonator with an x-pipe for a while, then doing the entire exhaust (SW headers with no cats and Corsa) 6 months down the road.
If your talking about a stock resonator being replaced with X-pipe it won't get that much more loud because if you ever have seen what is inside of a stock resonator you will see that there is only a small 4" length perforated section at the beginning of the resonator. The rest of the body is a solid pipe. Helmholtz design once again.
I have two stock resonators that I cut off and I was surprised that was all the muffling going on in there. It's design was to kill a certain frequency only that the mufflers didn't. The installation of a X-pipe will just flow better since it isn't at a 2.5" reduction like the resonator.
WVZR-1
04-21-2014, 06:06 PM
This is a stainless X-pipe removed from a 300 "Hemi" SRT. The pipe if cut just behind the clamps beyond the flange and just in front of the turn at the other end yields 28" of usable pipe. The pipe is 2.5"+ inside and can easily be expanded to slip-over the factory pipes forward and rearward of the resonator. This one was removed in a collision repair so the flanges and clamps were destroyed by the shop. The opening in the X is likely 4" X 1 7/8' or maybe just a bit larger. I would think it ideal for factory resonator replacement.
All of the MOPAR aren't X-pipes even though they're welded as such. I believe it needs to be a 300. MOPAR I was told felt that the weld of the intermediate pipes in this fashion helped control resonance regardless of whether it was opened or NOT.
3417
Dynomax does a 3" system for the SRT and the X-pipe can be purchased separately in 3" aluminized pipe. It's a 54449 and depending on a relationship with a Walker jobber is maybe a possibility for a very nice 3". The Walker number hints that it's likely a 50"+ part, lots of material to work with.
http://www.summitracing.com/parts/wlk-54449/overview/
KILLSHOTS
04-21-2014, 06:11 PM
This is a stainless X-pipe removed from a 300 "Hemi" SRT. The pipe if cut just behind the clamps beyond the flange and just in front of the turn at the other end yields 28" of usable pipe. The pipe is 2.5"+ inside and can easily be expanded to slip-over the factory pipes forward and rearward of the resonator. This one was removed in a collision repair so the flanges and clamps were destroyed by the shop. The opening in the X is likely 4" X 1 7/8' or maybe just a bit larger. I would think it ideal for factory resonator replacement.
All of the MOPAR aren't X-pipes even though they're welded as such. I believe it needs to be a 300. MOPAR I was told felt that the weld of the intermediate pipes in this fashion helped control resonance regardless of whether it was opened or NOT.
3417
Dynomax does a 3" system for the SRT and the X-pipe can be purchased separately in 3" aluminized pipe. It's a 54449 and depending on a relationship with a Walker jobber is maybe a possibility for a very nice 3". The Walker number hints that it's likely a 50"+ part, lots of material to work with.
http://www.summitracing.com/parts/wlk-54449/overview/
Sweet, thanks for this info, Dave!!
KILLSHOTS
04-21-2014, 06:16 PM
If your talking about a stock resonator being replaced with X-pipe it won't get that much more loud because if you ever have seen what is inside of a stock resonator you will see that there is only a small 4" length perforated section at the beginning of the resonator. The rest of the body is a solid pipe. Helmholtz design once again.
I have two stock resonators that I cut off and I was surprised that was all the muffling going on in there. It's design was to kill a certain frequency only that the mufflers didn't. The installation of a X-pipe will just flow better since it isn't at a 2.5" reduction like the resonator.
Hey Tony,
Are you sure you aren't looking at later resonators? My understanding was that GM opened the resonator up A LOT in the 93-95 cars, but that the 90-92 resonators were the primary bottleneck, as they closed down to about 1-5/8" diameter. I had thought that removing the resonator from an early car would make a worthwhile difference. Is that not the case?
Thanks!
Hib Halverson
04-21-2014, 06:54 PM
Thanks Hib. I do have Marc's chip in my car currently...would it need to be recalibrated just to remove mufflers and resonator?
I appreciate the input!
Chris
I've never run a car with cats only. The noise is incredibly annoying, especially on a long trip but...my hearing is really good and lack any particular desire to be loud...not knocking it because there are many others who do want to be loud.
Anyway, the only experience I have which is similar was the Record Run car from way back in the day. It ran with stock manifolds but otherwise open exhaust and it had an aftermarket calibration to optimize the air fuel ratio for that. You'll have a little more restriction than that but you're removing 2/3s to 3/4s of the restriction by cutting off the resonator and the mufflers.
I think it's possible you may need to richen up the motor at WOT, but...check with Marc. My guess is he knows if you need to or not.
The main reason I suggest that is most people these days are running on E10 gas. The 6-7% ethanol usually in oxygenated fuel requires a more rich AFR to begin with–at WOT it goes from 12.5:1 down to about 12.2:1. So right there you're already lean. When you get rid of the restriction of the resonator and mufflers, the engine will go a bit lean and, if you never had the cal redone for E10, then you might end up too lean.
Again, check with Mark.
mike100
04-21-2014, 08:18 PM
x-piping the stock exhaust will induce a little resonance at 1700-1900 rpm, but much much less than just slapping a full 3" system on a vette. If you keep the stock mufflers, they still do a good job at keeping things reasonable plus the pipe diameter, bends, and pipe thickness is otherwise unaltered and part of the original engineered quiet system.
I was happy to run around like that for a year until I got greedy and did headers etc.
Something I have never tried, but would be interested in seeing how it worked out:
... those compact glass-pack tube sections in place of the resonator with otherwise stock pipes. Maybe a little quieter compared to and H or X-pipe?
KILLSHOTS
04-21-2014, 08:20 PM
Thanks again, Hib. I really do like it loud and I loved my L98 on cats alone (albeit 3 of them) but consensus seems to be that the LT5 on only 2 cats will make a lot more noise than that. Like "race car" loud, which may be OK for me but not for passengers or the local constabulary. I think I'm going to swap the resonator for an x-pipe first and then drive it for a little while before I go hacking off the mufflers. Easier to take more off than to put some back on, I guess!
mike100
04-21-2014, 08:20 PM
Also I had loud-azz borlas on an LT1 C4 before with totally stock everything else...very loud and droned in the hatchback badly. The mufflers do all the heavy lifting.
KILLSHOTS
04-21-2014, 08:23 PM
x-piping the stock exhaust will induce a little resonance at 1700-1900 rpm, but much much less than just slapping a full 3" system on a vette. If you keep the stock mufflers, they still do a good job at keeping things reasonable plus the pipe diameter, bends, and pipe thickness is otherwise unaltered and part of the original engineered quiet system.
I was happy to run around like that for a year until I got greedy and did headers etc.
Something I have never tried, but would be interested in seeing how it worked out:
... those compact glass-pack tube sections in place of the resonator with otherwise stock pipes. Maybe a little quieter compared to and H or X-pipe?
Agreed, think that's what I'm going to start with. You wouldn't happen to have a sound clip of your stock mufflers with no resonator, would you? Lorne just removed his resonator and I'll get to hear it in a couple weeks but he has Borla mufflers, so not really a valid comparison.
KILLSHOTS
04-21-2014, 09:38 PM
I've never run a car with cats only. The noise is incredibly annoying, especially on a long trip but...my hearing is really good and lack any particular desire to be loud...not knocking it because there are many others who do want to be loud.
Anyway, the only experience I have which is similar was the Record Run car from way back in the day. It ran with stock manifolds but otherwise open exhaust and it had an aftermarket calibration to optimize the air fuel ratio for that. You'll have a little more restriction than that but you're removing 2/3s to 3/4s of the restriction by cutting off the resonator and the mufflers.
I think it's possible you may need to richen up the motor at WOT, but...check with Marc. My guess is he knows if you need to or not.
The main reason I suggest that is most people these days are running on E10 gas. The 6-7% ethanol usually in oxygenated fuel requires a more rich AFR to begin with–at WOT it goes from 12.5:1 down to about 12.2:1. So right there you're already lean. When you get rid of the restriction of the resonator and mufflers, the engine will go a bit lean and, if you never had the cal redone for E10, then you might end up too lean.
Again, check with Mark.
Hib, are you at all familiar with the muffler eliminators that CC sells? They are 2-3/4" pipe and the hangers are identical to the ones on my 1990 car. CC does not expressly state that they work on a ZR-1 but everything else seems identical to me. Your thoughts are greatly appreciated!
Thanks!
Chris
Hib Halverson
04-22-2014, 12:00 AM
Hib, are you at all familiar with the muffler eliminators that CC sells? They are 2-3/4" pipe and the hangers are identical to the ones on my 1990 car. CC does not expressly state that they work on a ZR-1 but everything else seems identical to me. Your thoughts are greatly appreciated!
Thanks!
Chris
Sorry, Chris, while I'm aware that "muffler eliminator" products exist, I've never used them.
I can offer some instructions on how to build a great exhaust system for a ZR-1. It's the system I've had on my car for about 15 years.
See this web page (http://www.corvetteactioncenter.com/kb/questions/311/1992+-+1996%3A+Tech+Article%3A+Quietly+Powerful%3A+How+t o+Build+a+C4+LT1%7B47%7D4%7B47%7D5+Exhaust+that+Ga ins+28+hp+and...is+Quiet).
cadillac531
04-22-2014, 12:29 AM
On my '91, I have a '94 ZR-1 exhaust system with stock '94 resonator and the stock '91 cats. I cut the mufflers off the '94 system, welded in straight pipes and fabbed up '91-like tips.
It has great sound, but doesn't resonate at cruise. It also picked up 9 rwhp and 19 ft/lb at the wheels.
ZRXMAX
04-22-2014, 12:47 AM
My system got good "sound" comments after I built it some time ago.
Watson headers and 3 inch pipe
3" cats
3" x "18 straight thru bullet mufflers in the tunnel leaving room for an x pipe in front of it.
Flowmaster 40s at the the rear with straight tips.
My next system will add the blended X pipe.
I want to dump the Flowmasters and just put straight thru bullet mufflers out back.
If I really get carried away I can put another lenth of bullet muffler after the turn past the differential.
I could also use the tips that also have the sound deadening perforated interior section in them. In spite of how short they are they do seem to have a noise reduction factor to them.
That should give it a tone so low you will think its a big block.
This would essentially make it a straight shot once past the cats.
KILLSHOTS
04-22-2014, 01:01 AM
Sorry, Chris, while I'm aware that "muffler eliminator" products exist, I've never used them.
I can offer some instructions on how to build a great exhaust system for a ZR-1. It's the system I've had on my car for about 15 years.
See this web page (http://www.corvetteactioncenter.com/kb/questions/311/1992+-+1996%3A+Tech+Article%3A+Quietly+Powerful%3A+How+t o+Build+a+C4+LT1%7B47%7D4%7B47%7D5+Exhaust+that+Ga ins+28+hp+and...is+Quiet).
Thanks again, Hib, sure appreciate your knowledge and your taking the time to reply!
KILLSHOTS
04-22-2014, 01:13 AM
Thanks for all the replies, guys! I really appreciate it!
Let me clarify: some time in the future, I am going with SW headers, no cats, Corsa black-tip system, full emissions removal. At this point, I am looking for some SOUND, because I miss the loud rumble of my cats-only L98. I am looking for a temporary, inexpensive fix, because I'm not going to junk $1000 in mods when I go with my dream system 6 months down the road. After your helpful comments today, I am seriously considering 2 options for right now and all include my stock 90 manifolds with cats. 1) replace stock resonator with an x-pipe and retain stock mufflers. 2) install a Corsa resonator that a buddy has offered me, and remove the mufflers altogether.
Any more thoughts?
Thanks bros!
Hey guys,
LOVE my Z, but it's far too quiet with the stock exhaust. The '87 that I traded had only Magnaflow cats and no mufflers and I miss the sound. I rarely drive my car and when I do, I LOVE it loud! Guys on the other forum were bitching about how loud muffler eliminators were but I tried them anyway and LOVED them! Might have liked it louder, in fact.
So, I'm really set on a Corsa system but just I'm trying my best to be pragmatic and give proper consideration to different options before pulling the trigger. Wondering about just modifying my stock system by replacing the resonator with an X-pipe and deleting the mufflers altogether...just straight black LT-1 tips out the back. The only "mufflers" would be the cats, just like on my '87. I see very little potential for resonance with this setup. VERY, VERY inexpensive system, good return of HP, lots of sound.
Remember, I like to HEAR my car. If I want quiet, I drive my Camry.
Thoughts?
Thanks!
Chris
Try putting on a set of Moroso spiral flow mufflers on your car and see whats happens.
mike100
04-22-2014, 01:45 AM
Ok, I put a handful of videos in one spot of several exhaust combinations I have had in the last 3 years. First of all and last of all- this means nothing as the little microphone on my digital camera videos doesn't really do these much justice, except for the static one of the car parked showing the NPP flaps in action. That is the only one you can hear the decibels and resonance come in.
Maybe there is some idea of how much of a megaphone the Corsa system was that can be derived from the audio there... I'm going to claim statute of limitations for the hitchhiker I let drive the car the day the Corsa video was filmed.
driving uphill in a snowy rainstorm with stock system with x-pipe:
http://s29.photobucket.com/user/mschrameck/media/exhaust%20system%20clips/MOV02666_zpsdaeaaa82.mp4.html
Corsa doing 90 something with windows down:
http://s29.photobucket.com/user/mschrameck/media/exhaust%20system%20clips/MOV02368_zps796a1740.mp4.html
NPP StainlessWorks, headers with LS7 cats- but you can't hear the system activate too well in this clip:
http://s29.photobucket.com/user/mschrameck/media/exhaust%20system%20clips/MOV02806_zps1f3b65a5.mp4.html
B&B w X-pipe and stock manifolds (don't let the audio fool you- this was stupid loud):
http://s29.photobucket.com/user/mschrameck/media/exhaust%20system%20clips/IMG_0351_zps9a52287f.mp4.html
My old 95 LT1 car with turbo muffs, single outlets- Yes, it's slow...
http://s29.photobucket.com/user/mschrameck/media/exhaust%20system%20clips/MOV03507_zps9df370d7.mp4.html
better video clip of stock exhaust except x-pipe in place of resonator- accelerating uphill with passenger- loud-ish, but can still talk and hear yourself think.
http://s29.photobucket.com/user/mschrameck/media/exhaust%20system%20clips/CorvetteZR1Ridealong2_trimmed_zps6ea48f77.mp4.html
NPP working:
http://s29.photobucket.com/user/mschrameck/media/exhaust%20system%20clips/MOV02832_zps97199d80.mp4.html
My ZR-1 has undergone some evolutionary changes from stock, to it's current configuration & honestly, it's obnoxious and not real fun to travel in, because of the noise. The fact is, I don't travel in it.
If I can ever get around to it, I want to put a C6 style, muffler set up on it with the WOT valves, or whatever they are called.
It is good looking though!
http://i190.photobucket.com/albums/z224/A26B/TQES21.jpg
http://i190.photobucket.com/albums/z224/A26B/PA302734.jpg
KILLSHOTS
04-22-2014, 10:20 AM
Ok, I put a handful of videos in one spot of several exhaust combinations I have had in the last 3 years. First of all and last of all- this means nothing as the little microphone on my digital camera videos doesn't really do these much justice, except for the static one of the car parked showing the NPP flaps in action. That is the only one you can hear the decibels and resonance come in.
Maybe there is some idea of how much of a megaphone the Corsa system was that can be derived from the audio there... I'm going to claim statute of limitations for the hitchhiker I let drive the car the day the Corsa video was filmed.
driving uphill in a snowy rainstorm with stock system with x-pipe:
http://s29.photobucket.com/user/mschrameck/media/exhaust%20system%20clips/MOV02666_zpsdaeaaa82.mp4.html
Corsa doing 90 something with windows down:
http://s29.photobucket.com/user/mschrameck/media/exhaust%20system%20clips/MOV02368_zps796a1740.mp4.html
NPP StainlessWorks, headers with LS7 cats- but you can't hear the system activate too well in this clip:
http://s29.photobucket.com/user/mschrameck/media/exhaust%20system%20clips/MOV02806_zps1f3b65a5.mp4.html
B&B w X-pipe and stock manifolds (don't let the audio fool you- this was stupid loud):
http://s29.photobucket.com/user/mschrameck/media/exhaust%20system%20clips/IMG_0351_zps9a52287f.mp4.html
My old 95 LT1 car with turbo muffs, single outlets- Yes, it's slow...
http://s29.photobucket.com/user/mschrameck/media/exhaust%20system%20clips/MOV03507_zps9df370d7.mp4.html
better video clip of stock exhaust except x-pipe in place of resonator- accelerating uphill with passenger- loud-ish, but can still talk and hear yourself think.
http://s29.photobucket.com/user/mschrameck/media/exhaust%20system%20clips/CorvetteZR1Ridealong2_trimmed_zps6ea48f77.mp4.html
NPP working:
http://s29.photobucket.com/user/mschrameck/media/exhaust%20system%20clips/MOV02832_zps97199d80.mp4.html
Thanks so much for taking the time to post these, Mike. The 41 second clip is very helpful; I think it sounds pretty good with the x-pipe in place of the resonator. Seems like a good cheap, temporary fix.
Thanks again for taking the time!
Chris
KILLSHOTS
04-22-2014, 10:22 AM
My ZR-1 has undergone some evolutionary changes from stock, to it's current configuration & honestly, it's obnoxious and not real fun to travel in, because of the noise. The fact is, I don't travel in it.
If I can ever get around to it, I want to put a C6 style, muffler set up on it with the WOT valves, or whatever they are called.
It is good looking though!
http://i190.photobucket.com/albums/z224/A26B/TQES21.jpg
http://i190.photobucket.com/albums/z224/A26B/PA302734.jpg
WOW, Jerry! It may be obnoxious, but yours clearly wins best-looking exhaust system honors!
4-cam
04-22-2014, 11:15 AM
That exhaust is amazing.... along with the rest of the car.
PhillipsLT5
04-22-2014, 04:36 PM
Awesome car!, I still remember when it ran the fighter jet at Nellis AFB
Hib Halverson
04-22-2014, 07:21 PM
Thanks again, Hib, sure appreciate your knowledge and your taking the time to reply!
You're welcome, "KILLSHOTS".
Glad to be of service.
Blue Flame Restorations
04-22-2014, 08:16 PM
My ZR-1 has undergone some evolutionary changes from stock, to it's current configuration & honestly, it's obnoxious and not real fun to travel in, because of the noise. The fact is, I don't travel in it.
If I can ever get around to it, I want to put a C6 style, muffler set up on it with the WOT valves, or whatever they are called.
It is good looking though!
http://i190.photobucket.com/albums/z224/A26B/TQES21.jpg
http://i190.photobucket.com/albums/z224/A26B/PA302734.jpg
Jerry, I have a set of the C6 Z06 tips with the valves. Just PM me if interested.
Brett!
Awesome car!, I still remember when it ran the fighter jet at Nellis AFB
It was a really cool thing.
Wasn't much of a run. Frenchie never really got on it. Wish they would have let me drive. Of course there's no way to keep up with an F16 in clean configuration in a max, afterburner takeoff.
It was a really cool thing.
Wasn't much of a run. Frenchie never really got on it. Wish they would have let me drive. Of course there's no way to keep up with an F16 in clean configuration in a max, afterburner takeoff.
Even a 0-60 or 0-100mph run? I can see a car leaving harder than a jet.
KILLSHOTS
04-27-2014, 11:01 PM
Anyone know anything about the Magnaflow mufflers that Corvette Central has? They have the black LT-series tips, so they'd match the appearance of a later Z, and they're a "straight-through" design. These on a stock system plus an X-pipe in place of a resonator would be pretty free-flowing, eh?
msorenso
04-27-2014, 11:43 PM
Also I had loud-azz borlas on an LT1 C4 before with totally stock everything else...very loud and droned in the hatchback badly. The mufflers do all the heavy lifting.
Interesting, I was always curious how that combo worked out.
KILLSHOTS
04-28-2014, 06:53 PM
Well, I had my stock 90 resonator replaced today with an H-pipe and I am SHOCKED with the result: there is virtually ZERO difference in sound. I don't detect any drone anywhere in the range or popping on decel, which is good, but there's certainly no additional sound. Not sure about power, as I only got to rev it to maybe 4500 afterward but I didn't detect any SOTP difference.
Looks like the mufflers do all the work on a stock 90 system. Driving it back to back, I don't see any reason for the resonator in the first place. Sure am glad this little experiment was cheap. :mad:
efnfast
04-28-2014, 07:03 PM
Well, I had my stock 90 resonator replaced today with an H-pipe and I am SHOCKED with the result: there is virtually ZERO difference in sound. I don't detect any drone anywhere in the range or popping on decel, which is good, but there's certainly no additional sound. Not sure about power, as I only got to rev it to maybe 4500 afterward but I didn't detect any SOTP difference.
Looks like the mufflers do all the work on a stock 90 system. Driving it back to back, I don't see any reason for the resonator in the first place. Sure am glad this little experiment was cheap. :mad:
Keep in mind, you will be moving 50%? more air through the exhaust at higher RPM. That's when the opener exhaust will make more diffrance.
Gunny
04-28-2014, 07:16 PM
If you had a totally stock 90 exhaust system then swapping the resonator for an H or X pipe (using at least 2.75" pipe) will free up a good bit of restriction but the remaining restriction is the stock mufflers, necked down to just over 2" and only one tip open. Changing to later C4 mufflers will free up more of the restriction without changing the sound dramatically (i.e. still stock quiet with no resonance).
For LOUD without resonance you should check out Corsa ... again, the best thing is to listen to and/or ride in Z's with the systems you're interested in. Since I first installed Corsas in a 94 LT1 I thought it would be the perfect system for my 90 Z ... wrong assumption. Once I put headers on and deleted the cats the Corsas were now too loud for my taste even though there was no resonance. I know Z-owners who love Corsas and other Z-owners that absolutely despise Corsas ... bottom line, put on what YOU like.
KILLSHOTS
04-28-2014, 08:30 PM
If you had a totally stock 90 exhaust system then swapping the resonator for an H or X pipe (using at least 2.75" pipe) will free up a good bit of restriction but the remaining restriction is the stock mufflers, necked down to just over 2" and only one tip open. Changing to later C4 mufflers will free up more of the restriction without changing the sound dramatically (i.e. still stock quiet with no resonance).
For LOUD without resonance you should check out Corsa ... again, the best thing is to listen to and/or ride in Z's with the systems you're interested in. Since I first installed Corsas in a 94 LT1 I thought it would be the perfect system for my 90 Z ... wrong assumption. Once I put headers on and deleted the cats the Corsas were now too loud for my taste even though there was no resonance. I know Z-owners who love Corsas and other Z-owners that absolutely despise Corsas ... bottom line, put on what YOU like.
Wondering what would happen if I added those Magnaflow mufflers that Corvette Central has with the black LT-series tips. They're a "straight-through" design, so they should flow well, and I like my car LOUD. Know anything about those?
mike100
04-28-2014, 08:50 PM
The kind of hp cat-backs open up is mostly over 5000 rpm on these cars. Headers help the mid-range torque situation much, much more.
Gunny
04-28-2014, 09:03 PM
Wondering what would happen if I added those Magnaflow mufflers that Corvette Central has with the black LT-series tips. They're a "straight-through" design, so they should flow well, and I like my car LOUD. Know anything about those?
Corv Central lists 3 versions with LT tips from $259 to $303 ... all 3 have this description: "There are no chambers, no baffles and no louvers to restrict exhaust flow. You get wide open performance from Magnaflow. It doesn't flow any better than this." I'm reasonably certain that they will be not only LOUD but also have considerable DRONE which can be both annoying and obnoxious to those who don't like it.
Years ago one of the Vette catalog suppliers sold a turbo muffler with LT1 tips that was reputed to be louder than stock without the drone. I don't have first hand knowledge but perhaps someone else will remember and chime in.
KILLSHOTS
04-28-2014, 09:12 PM
The kind of hp cat-backs open up is mostly over 5000 rpm on these cars. Headers help the mid-range torque situation much, much more.
Definitely doing headers. Just trying to be pragmatic and explore ways of NOT throwing out a bunch of perfectly good 2-3/4" pipe. Now that my system has no resonator, if I could find the right mufflers, I'd be in business. Not into the whole Flowmaster 17228 thing with transplanting tips, though, if I can avoid it.
KILLSHOTS
04-28-2014, 09:17 PM
Corv Central lists 3 versions with LT tips from $259 to $303 ... all 3 have this description: "There are no chambers, no baffles and no louvers to restrict exhaust flow. You get wide open performance from Magnaflow. It doesn't flow any better than this." I'm reasonably certain that they will be not only LOUD but also have considerable DRONE which can be both annoying and obnoxious to those who don't like it.
Years ago one of the Vette catalog suppliers sold a turbo muffler with LT1 tips that was reputed to be louder than stock without the drone. I don't have first hand knowledge but perhaps someone else will remember and chime in.
Just trying to figure out what "drone" really is. My 87 convertible had Magnaflow cats and then nothing...straight pipes out the back. I wanted it louder than it was. It had some pretty LOUD resonance at certain RPM ranges but hey, it was a muscle car, and I liked it. The difference I have with the Z is the big greenhouse in back, but I still don't think the noise will bother me. It's what these cars are all about, as far as I'm concerned. That said, I still respect the opinion of you and others who take the time to offer advice. Tough call.
Rex Ruby
04-29-2014, 12:59 PM
Hey guys,
LOVE my Z, but it's far too quiet with the stock exhaust. The '87 that I traded had only Magnaflow cats and no mufflers and I miss the sound. I rarely drive my car and when I do, I LOVE it loud! Guys on the other forum were bitching about how loud muffler eliminators were but I tried them anyway and LOVED them! Might have liked it louder, in fact.
So, I'm really set on a Corsa system but just I'm trying my best to be pragmatic and give proper consideration to different options before pulling the trigger. Wondering about just modifying my stock system by replacing the resonator with an X-pipe and deleting the mufflers altogether...just straight black LT-1 tips out the back. The only "mufflers" would be the cats, just like on my '87. I see very little potential for resonance with this setup. VERY, VERY inexpensive system, good return of HP, lots of sound.
Remember, I like to HEAR my car. If I want quiet, I drive my Camry.
Thoughts?
Thanks!
Chris
My Z had a Borla system on it when I bought it. SInce I have muffler elims on my LT1 I thought that would be the way to go for the Z. Had pipes made up to eliminate the Borla mufflers. Didn't sound as nice as my LT1. Had an X pipe made up to replace the Borla resonator, so now all I have is the cats. Sounds GREAT, not too loud and was inexpensive.
KILLSHOTS
04-29-2014, 01:58 PM
My Z had a Borla system on it when I bought it. SInce I have muffler elims on my LT1 I thought that would be the way to go for the Z. Had pipes made up to eliminate the Borla mufflers. Didn't sound as nice as my LT1. Had an X pipe made up to replace the Borla resonator, so now all I have is the cats. Sounds GREAT, not too loud and was inexpensive.
Great to hear, John. I am really considering this same setup. Just had my stock resonator removed yesterday and it didn't change a thing. Thinking about just taking it back to the shop and having them chop off the mufflers too.
How bad is the drone with straight pipes?
Thanks!
Chris
Rex Ruby
04-29-2014, 04:11 PM
How bad is the drone with straight pipes?
Chris
Not bad at all, I really don't notice any.
They sound great when getting into it:dancing
KILLSHOTS
04-29-2014, 04:21 PM
Not bad at all, I really don't notice any.
They sound great when getting into it:dancing
Yeah, I think I've just made my decision. Thanks!
KILLSHOTS
04-30-2014, 01:30 PM
My Z had a Borla system on it when I bought it. SInce I have muffler elims on my LT1 I thought that would be the way to go for the Z. Had pipes made up to eliminate the Borla mufflers. Didn't sound as nice as my LT1. Had an X pipe made up to replace the Borla resonator, so now all I have is the cats. Sounds GREAT, not too loud and was inexpensive.
Hey John,
One more question for you...
I know that with open exhaust, there will be some "popping" on deceleration, and a bunch of guys are saying my chip will need to go back to Marc for recalibration. I don't mind that popping - had it on my L98 and loved it - but I don't want it to become full-on backfiring, which I understand is somewhat common on an LT5 anyway. Have you had any problem with backfiring...did you have to send your chip back to Marc?
Thanks again!
Chris
Rex Ruby
04-30-2014, 05:44 PM
I have some minor popping upon decel and I don't mind!
Haven't sent my chip back to Marc.
KILLSHOTS
04-30-2014, 06:55 PM
I have some minor popping upon decel and I don't mind!
Haven't sent my chip back to Marc.
Sweet! Couldn't find any tips worth buying so I bought the LT1-tipped eliminators from Corvette Central yesterday. Can't wait!
KILLSHOTS
05-12-2014, 10:59 PM
Hey guys,
Completed the full-monty exhaust project today...Corvette Central LT-tipped muffler eliminators and no resonator coming off stock manifolds. WOW!!! It is LOUD! But a good loud...sounds like a NASCAR stocker...much louder and much more "meaty" than my L98 car with straight pipes. I LOVE the sound!!! And surprisingly little resonance. In fact, virtually all the loud seems to be out behind the car. That said, I'll be very lucky to make it a month without being pulled over.
Oh, there's the doorbell...UPS man dropping off my 4:10s! :dancing
LGAFF
05-12-2014, 11:07 PM
Sound clip?
PhillipsLT5
05-12-2014, 11:40 PM
I thought I heard some LT5 Music in Scottsdale
KILLSHOTS
05-13-2014, 01:05 AM
I thought I heard some LT5 Music in Scottsdale
Phil, remember that blue Z06 parked next to us at C&C a couple weeks ago? It's not that loud at idle, but give it a little gas and it's real close!
KILLSHOTS
05-13-2014, 01:06 AM
Sound clip?
OK, I'll see if I can get something recorded this weekend.
PhillipsLT5
05-13-2014, 11:08 AM
Hello PO PO
KILLSHOTS
05-13-2014, 11:22 AM
Hello PO PO
HA! My thoughts exactly! I love it and don't want to change it, but I may have to talk to Daryll again about that resonator, lest I end up with a fistful of noise citations.
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