O.... M.... G....

[Aurora40]

I'm sure you've all heard me rave and rave about my stock-looking exhaust setup... I love that thing! Stock square tips, LT4 res, 3" dynomax ultraflows. The sound is beautiful, deep, like stock only much moreso. The only issue was the resonance was like stock, only much moreso.

Finally I had had enough and ordered up a Corsa system. I don't think the tips compliment the C4 body, they are too flashy. And the tone to me is much more appropriate on my Aurora than on a 'vette. I figured, here is a system that I "like" 100% of the time, vs one I "love" 80% and "absolutely hate" 20%. It was more that I'd resigned myself to getting the Corsa. Not that I don't think they make a quality product or anything...

So I had them put on on Thursday. The guy did a great job, fit it up great, he even worked to pull the tips in as much as possible so they wouldn't look overly flashy. They look good, no doubt. But looking at my stock system discarded in the corner, well I felt bad. I even asked him how long they'd be there in case I changed my mind and wanted them put back on...


That was, up until I got in the Z and fired it up... Holy crap! The sound of the Corsa is AWESOME! It is much burblier than the old setup. And the sound comes from behind you, not from underneath the car. I seriously sometimes thought there must be some Mustang or something behind me because I was so used to the sound coming from inside the car. And the interior doesn't rattle and buzz, nor did my head. It definitely won't shake the ground though like the old one, which was kinda cool.

The sound is very different. Night and day sound quality. The Corsa is a bit higher pitched, a little tinny. And what is amazing is that there can be a lot of sound when you step into the gas, and it is burbly and screaming, yet it does not vibrate things. With the old system, sometimes I'd swear it was going to shake the car apart.

And when you floor it, look out! The sound is incredible! It sounds like shredding metal as the full note of the engine's rip is let out! I don't care what it looks like, I don't care which tips flow or don't, nor how big the pipes are. I don't even care that it was absurdly expensive for an exhaust. The thing sounds that good! I'm only sorry I didn't do it sooner!

Here's my two Corsa's:

http://img530.imageshack.us/img530/982/dsc00372iu8.jpg (http://imageshack.us)

[LGAFF]

Schweet!

Love the red 90s, reminds me of all of the first articles that came out about the Z, seemed every test car was red. I know people tend to like the 91-95 but I think the black molding makes the car. :thumbsup:

Great Lic plate also....and is that the 4.0 V8 Aurora?

LGAFF
92 ZR1
#234

[Aurora40]

Great Lic plate also....and is that the 4.0 V8 Aurora?
Yup, the 5-time Indy 500 winning Aurora 4L V8. :) And those oil stains in the driveway are from our 190k mile Regal GS... :redface: (it's a simple oil pan gasket, but you have to raise the engine up to change it)

[LGAFF]

The 4.0 is the same motor used in the Shelby Series one, did you see lingenfelter had an entire Aurora Indy package on e-bay about 2 months ago, several blocks. 3 sets of heads, 4 boxes of cams, intakes, etc and it was at about $400 bid when I saw it with only a few days remaining.

LGAFF
92 ZR1
#234

[tomtom72]

That's a cool pict Bob! Double overhead cam cars x 2! :thumbsup:

I see that the tips on the Corsa are round or maybe slightly oval? I think that they look alright.....yes I do "prefer" the blacked out shape of the OE tips but the big round/oval tip look is starting to grow on me as it seems to be the "in" thing. My Cobalt has one that looks to be a refugee from the C6 assembly line...and it's growing on me....but it makes me :sign10: to see it on a 4 banger!

Nice to know that the resonance in that Corsa is not an issue at 1200 to 1800 in 6th. I have an odd Q to ask about the Corsa, when they say "Cat-back" do they mean from the OE cats or from aftermarket cats, or does it make a difference? I really thank you for sharing your evaluation thoughts on the system.

:cheers:
Tom

[rhipsher]

Yep. I like the red to. And my 49th street rockers.

http://i301.photobucket.com/albums/nn63/keeno1970/Vettepictures004.jpg

http://i301.photobucket.com/albums/nn63/keeno1970/Vettepictures002.jpg

The only color Z I like better is yellow like the one xlr8nflorida has.
And that B&B triflow is the most brutal sounding exhaust I've heard so far. And as soon as I get that govornment check from Obama It will be done.:mrgreen: hehe! Ooops. Damn it I don't qualify.

http://i301.photobucket.com/albums/nn63/keeno1970/shark.gif

[Sgreg]

I'm sure you've all heard me rave and rave about my stock-looking exhaust setup... I love that thing! Stock square tips, LT4 res, 3" dynomax ultraflows. The sound is beautiful, deep, like stock only much moreso. The only issue was the resonance was like stock, only much moreso.

Finally I had had enough and ordered up a Corsa system. I don't think the tips compliment the C4 body, they are too flashy. And the tone to me is much more appropriate on my Aurora than on a 'vette. I figured, here is a system that I "like" 100% of the time, vs one I "love" 80% and "absolutely hate" 20%. It was more that I'd resigned myself to getting the Corsa. Not that I don't think they make a quality product or anything...

So I had them put on on Thursday. The guy did a great job, fit it up great, he even worked to pull the tips in as much as possible so they wouldn't look overly flashy. They look good, no doubt. But looking at my stock system discarded in the corner, well I felt bad. I even asked him how long they'd be there in case I changed my mind and wanted them put back on...


That was, up until I got in the Z and fired it up... Holy crap! The sound of the Corsa is AWESOME! It is much burblier than the old setup. And the sound comes from behind you, not from underneath the car. I seriously sometimes thought there must be some Mustang or something behind me because I was so used to the sound coming from inside the car. And the interior doesn't rattle and buzz, nor did my head. It definitely won't shake the ground though like the old one, which was kinda cool.

The sound is very different. Night and day sound quality. The Corsa is a bit higher pitched, a little tinny. And what is amazing is that there can be a lot of sound when you step into the gas, and it is burbly and screaming, yet it does not vibrate things. With the old system, sometimes I'd swear it was going to shake the car apart.

And when you floor it, look out! The sound is incredible! It sounds like shredding metal as the full note of the engine's rip is let out! I don't care what it looks like, I don't care which tips flow or don't, nor how big the pipes are. I don't even care that it was absurdly expensive for an exhaust. The thing sounds that good! I'm only sorry I didn't do it sooner!

Here's my two Corsa's:

http://img530.imageshack.us/img530/982/dsc00372iu8.jpg (http://imageshack.us)

Yep, I played the exhaust mix and match game and came to the same conclusion. For all around great performance without resonance, Corsa rules ! :cheers: :handshak:

[HIZNHRZ]

The Corsa is a bit higher pitched, a little tinny...And when you floor it, look out! The sound is incredible! It sounds like shredding metal as the full note of the engine's rip is let out!


While I can't be sure we are talking about the same thing, the tinny sound seems to go away with use. It took about 1K miles. Drive it and tell me if the sound of yours changes as well. By change, I also mean gets better.

If I have one complaint about the Corsa it's when you put your foot in it, everyone within a 5 mile radius hears you...not always a good thing :mrgreen:

Next to the Corsa, my favorite was the Callaway Twin Double-D system that I had on my Red/Gry ZR1. There is nothing I didn't like about the Callaway system. I bought my Blk/Blk with a Borla system which with headers, I personnaly didn't care for the tone. I would call it raspy. I tried the stock system with headers and that too me was too "dry". I liked the BB (with headers) at first but we all know (not necessarily agree on) the rub with BB. To my ear, the Corsa, by far is the best.

Glad to hear you like it Bob.

[Aurora40]

Nice to know that the resonance in that Corsa is not an issue at 1200 to 1800 in 6th. I have an odd Q to ask about the Corsa, when they say "Cat-back" do they mean from the OE cats or from aftermarket cats, or does it make a difference? I really thank you for sharing your evaluation thoughts on the system.

:cheers:
Tom
Hey Tom, it is from the factory cats back. If you have stock manifolds, you could put it on yourself with no special tools (no welding). I had to have mine installed though, as the pipes at the front had to be shortened and have 3-bolt flanges added in order to bolt up to my headers w/ cats.

Possibly with the new SW header/cats combo that won't be true? They claim it will mate up to a factory exhaust, as they shorten the collector to get the ends in the same place as the factory. So perhaps that's a combo that would require no cutting/welding, but I don't know for sure.

[jonszr1]

gotta agree about the corsa . and with headers it has just that little more omph in the sound that makes it perfect for a cruizer . i wonder if anyone adapted an x pipe to it.?

[Jagdpanzer]

Bob,
Welcome to the Corsa fan club. Any pics of the install?
I share your comments about the sound qualities of the system, relatively quiet drone free when just cruising down the road then full LT5 thunder when you put your foot in it.
In my case I went with 3" to 2.5" stainless reducers from SW to transition from the 3" cat outlet to the 2.5" Corsa tube diameter. Added 4" flexes just after the reducers to help eliminate bending forces in the system. Also used some exhaust pipe sealant in the joints to eliminate any small leaks.

[Aurora40]

Next to the Corsa, my favorite was the Callaway Twin Double-D system that I had on my Red/Gry ZR1. There is nothing I didn't like about the Callaway system.
I have always found that system intriguing. But so few people have had one it's hard to know if resonance is an issue. Also the $1800 price tag is offputting.

I've since learned that the mufflers Callaway used are super turbos, and so I wonder if the "mixing chamber" is just an off-the-shelf part too? I think I might be a little upset if I'd paid $1800 to find out a) the system is not stainless, and b) that a local guy could have thrown the parts together for much less. I realize you are paying for their research into which parts to put together, and for the fit/finish and tips, but still...

Anyway, I'll let you know if the system changes. I sort of seem to recall with the Aurora that it got quieter after a few days/weeks of use. Though that car had some issues with where the Corsa system met the stock system in that it didn't clamp tight. They fixed it in person and it's been fine for the 5 years since. :cheers:

[QB93Z]

Nice write-up Bob. I am planning on getting a Corsa for my 90 as soon as I get the radiator replaced.

Jim

[tomtom72]

Thanks Bob for the response! Much appreciated!:thumbsup:

Sorry for this Hi-jack. I was wondering exactly what SSworks modified / changed on the new headers vs the older headers. Does any one know, as I've forgotten the relationship, what the relationship equation was with respect to collector lenght and bottom end or top end results? I remember that a few mfg's had adjustable lenght collectors, back in the stone age circa the 70's, for tuning the power band. I just can't remember the relationship long collectors = bottom end(?), shorter collectors = top end(?).

Again, thanks for your input and sorry for the hi-jack Bob.

:cheers:
Tom

[Paul Workman]

Thanks Bob for the response! Much appreciated!:thumbsup:

Sorry for this Hi-jack. I was wondering exactly what SSworks modified / changed on the new headers vs the older headers. Does any one know, as I've forgotten the relationship, what the relationship equation was with respect to collector lenght and bottom end or top end results? I remember that a few mfg's had adjustable lenght collectors, back in the stone age circa the 70's, for tuning the power band. I just can't remember the relationship long collectors = bottom end(?), shorter collectors = top end(?).

Again, thanks for your input and sorry for the hi-jack Bob.

:cheers:
Tom

Tom,

No easy answer. The collector length is like one instrument in an orchestra - it's effect on the overall symphony (engine tuning) has to be considered as part of the effect all the other "instruments" have on the outcome. The collector is but part of the exhaust system, and the entire length - not only the collector - plays a role.

You can "Google" exhaust tuning, but this is one author that I thought had a pretty clear description of the considerations that go into the design of intake and exhaust systems and how they interact.

Bottom line: Even with considerable computer modeling, the proof is in the experimentation: Axiom: "Truth is where you find it"! Some experimentation is required, regardless (it seems).

I know...:blahblah::blahblah: But, all that said I'm intrigued by the "gold" Pete seems to have struck with his exhaust system...It seems to be doing pretty well. (More research and empirical "serendipity" is in order (for me) before I hack my exhaust this winter, "fer sher".:rolleyes:) It would be nice if "Z boyz fm Illinoiz" could be talked into buying or building a workable dyno so as to do some experimenting w/o having to cough up $100+ "per try"...(Our secret...I'll "spring" it on em after I do some research! ;)) Given enough pipe and cheap dyno access, I suspect much could be done to optimize the LT5 for whatever kind of driving we each have in mind.

Anywayz...check this out. Keep in mind that tho the model linked in the article is for single, two and four cylinder applications, a V8 with dual exhausts is (afer all) just two "separate" 4-cylinders that happen to share a crank shaft, i.e. their exhausts are separated to their respective group of 4.

W/o entering a single value, the number of considerations in the calculator provides a lot of insight to what it takes to properly tune an exhaust. Check it out!

http://bmwmotorcycletech.info/InExTuning.htm


P.

[XfireZ51]

All,

If you are using the Corsa, speak to Ccmano about his latest mod. He took the Magnaflow Xpipe and resonator and put that in place of the
Corsa pipes. He kept the corsa mufflers however. He pretty much loves it.
No resonance according to Hans and WOT doesn't sound like shredding metal. Basically he has the same system I do but I have tthe MF mufflers to go with it.

[GOLDCYLON]

Well a response to your OMG and gag me with a fork era comments leads me to a modern day response to your Corsa conclusion. Well Duh..... :mrgreen:

Actually Tom I chased this one as well and I 100% concur with your statement on the tips. My idea of the best looking and non resonance system would be the corsa system with the Billy Boat oval tips. Fills out the exhaust cut out nicely. Mine came with a gen1 B&B and the resonance was painful. Gen3 is not much better

For a track car the best sounding and best performing system is the B&B without a doubt and damn the resonance. But the best cruiser is Corsa and it sounds mean enough when you need it. Glad your happy :cheers:

[DMark]

...... the sound comes from behind you, not from underneath the car...... the interior doesn't rattle and buzz....
I had the same results when I extended my tips pass the exhaust cutout in the bumper. I have SW headers into a Flowmaster system. The resonance would run my wife out of the car on highway trips. Adding the Magnaflow tips fixed that problem.

Amazing that just extending a 1/2 inch pass the edge would move the sound to where it needs to be.

http://i38.tinypic.com/n18aqd.jpg

[Paul Workman]

All,

If you are using the Corsa, speak to Ccmano about his latest mod. He took the Magnaflow Xpipe and resonator and put that in place of the
Corsa pipes. He kept the corsa mufflers however. He pretty much loves it.
No resonance according to Hans and WOT doesn't sound like shredding metal. Basically he has the same system I do but I have tthe MF mufflers to go with it.

Dom,
I reeeeeaaalllly like the look (from the rear) and the sound of your MF system. Wanting best possible performance for type of diving (I do) w/o interior droning, it would be fun to be able to tweak lengths, diameters, mufflers, etc, and then dyno the results and tweak again...[sigh]. For sure, Pete's onto something, methinks, at least from a drag race perspective (that I've seen). It may be possible to have one's cake and eat it too - at least according to some engineers. But, to your point, I'd like to hear Han's system sometime too.

Interesting thread.

P.

[jonszr1]

so what is petes setup ? i have a 21/2 in set up done by spin tec with a dr gas xpipe i picked up from the flowmaster set up i had , it went from 117.50 best mph to 119.85 best of each system . cars on u tube @ famoso. i wonder if using the factory 23/4 in tubing with 3 in turbo muffler with a 3 in x pipe might be the perfect size. just thought to share

[Aurora40]

For a track car the best sounding and best performing system is the B&B without a doubt
I never really understand why people say this? Is it because it has a lot of drone it must perform well?

In spite of the 3" tubing, it has 2.5" pipes in the res and mufflers. Also the pipe is both perforated, and has those weird mesh screens intersecting it. I really don't see how that would be the best from a performance standpoint. They could have 4" pipes on it, the resonator and mufflers still look restrictive.

That Magnaflow system seems interesting though, 3" everywhere.

[rhipsher]

I have heard the same thing from alot of people. They say they liked the little extra boost in hp from the B&B. But the resonence was so bad that they couldn't even talk to their passenger. Most people that have corsa really like them.

[GOLDCYLON]

I never really understand why people say this? Is it because it has a lot of drone it must perform well?

In spite of the 3" tubing, it has 2.5" pipes in the res and mufflers. Also the pipe is both perforated, and has those weird mesh screens intersecting it. I really don't see how that would be the best from a performance standpoint. They could have 4" pipes on it, the resonator and mufflers still look restrictive.

That Magnaflow system seems interesting though, 3" everywhere.


Simple the B&B is indeed 3 inchs and the most free flowing system beyond straight pipes and has been proven with numerious dyno runs. Also the Mesh screens you speak of which are noise cancelation cones in the series three version or Gen3 of the B&B family for ZR-1 exhaust systems. The earlier versions Gen I did not have those mesh cones and was even more painful in the 1200-1800 RPM range and forget having a conversion in 6th gear. The GEN II version was a resonator mod only or as I called it the oversized centerline fartcan mod that was internal. If you had a Gen III B&B system and you thought that was loud you havent heard nothing yet lol.

And your right performace=sound is a hollow arugment. Im referring to all the dyno runs done on the gen I version which Bob was consistently proven

[HIZNHRZ]

When I took my car to Marc Haibecks last fall it had the BB system. I spoke with him at length about his experience with BB and Corsa. I certainly could have heard him incorrectly but what I got out of the conversation was his dyno experience indicated that the better torque curves were obtained with the Corsa system. This was for original displacement engines; strokers did, in fact, benefit from the 3 inch pipes.

[GOLDCYLON]

When I took my car to Marc Haibecks last fall it had the BB system. I spoke with him at length about his experience with BB and Corsa. I certainly could have heard him incorrectly but what I got out of the conversation was his dyno experience indicated that the better torque curves were obtained with the Corsa system. This was for original displacement engines; strokers did, in fact, benefit from the 3 inch pipes.


Depends on the generation of B&B also Marc has a backpressure part to his argument

[rhipsher]

Since we are on the subject of exhaust I have a question that I have still not had a good answere for. I have a Borla system. And almost a year ago late one night I went over some railraod tracks and could kiss my resonater goodbye. You want to talk about drone! My Z sounded like a Southern Pacific frieght train comming down the road. So I measured the lenth of the res and went to midas and had them cut me two 2 1/2 inch pipes and flared one end just as a temporarely fix until I get another resonator. So my question is does running straight pipes instead of a resonator make for better breathability?

[GOLDCYLON]

I would have to state without a doubt due to the internal baffling on ALL resonators. What I do like about the Corsa Power pulse system is the resonator is elongated at the mid line and has a lower profile than the B&B Fartcan in the middle of the car. I guess we can add Borla to that list. My Car is a stock height and the B&B resonator always hit R&R tracks and speed bumps no matter how fast I went over them or the angle of attack to the problem. (Reminded me of my traction bars days on my Camaro’s when I was 17 lol)

My car the previous owner had installed the GEN I B&B system and upon driving the car home from Houston Texas the resonator to my surprise had been almost destroyed by the previous owner under my car as the front input pipes to the resonator were all cracked and barely hanging on at the weld seams and the underside of the unit looked like it was routinely beaten over the course of ten years. I drove it all the way home to Phoenix in this condition and all I could say to my father who joined me on the trip was What??????
:mrgreen:

Corsa is the best touring system handsdown but the best looking tip wise IMHO will alway be the oval tips of the B&B system.

[rhipsher]

That makes sense to me. My car is totally stock minus the borla. When I had it dyno'd at Coreys last month it ran 341.75rwhp 335.50 ft lbs torque. I asked Corey if that was normal for stock. And he said that was a little better than stock. They typically are around 325 for a 375 LT5. Weather those straight pipes that only cost me $30 bucks made a 16hp difference? I just don't know. But the resonator did have a much better sound than the straight pipes. But amazingly the straight pipes don't produce any drone at all which really supprises me.

[jonszr1]

did they put a crossover or x pipe in the system when they did it ? if not there is a few xtra hp in doing that

[jonszr1]

ps on my spin tec set up it has an x pipe and a crossover back behind the rear end . dont know why they did that but all i know is this set up that they built for me makes good hp. i dont think a 3 in would make any more . jmho

[Paul Workman]

That makes sense to me. My car is totally stock minus the borla. When I had it dyno'd at Coreys last month it ran 341.75rwhp 335.50 ft lbs torque. I asked Corey if that was normal for stock. And he said that was a little better than stock. They typically are around 325 for a 375 LT5. Weather those straight pipes that only cost me $30 bucks made a 16hp difference? I just don't know. But the resonator did have a much better sound than the straight pipes. But amazingly the straight pipes don't produce any drone at all which really supprises me.

Mine to is a stock 90 except for a Borla cat-back. Recently it dyno'ed at 339.x rwhp with the resonator, for what it's worth.

Speaking of Borla, w/ the resonator did you get a loud, narrow resonance up around 3300?

P.

[Pete]

so what is petes setup ? i have a 21/2 in set up done by spin tec with a dr gas xpipe i picked up from the flowmaster set up i had , it went from 117.50 best mph to 119.85 best of each system . cars on u tube @ famoso. i wonder if using the factory 23/4 in tubing with 3 in turbo muffler with a 3 in x pipe might be the perfect size. just thought to share

Brad,i have Jeal headers,SW X-pipe, two 3" Dynomax bullits and Gen I B&B mufflers.
This is a full length 3" system.

Pete

[Aurora40]

Weather those straight pipes that only cost me $30 bucks made a 16hp difference?
Well, it could have been any of the exhaust, not just the resonator replacement, right? But anything has got to be better than the 375hp exhaust system. If you look at the stock resonator, it is horrible. It necks down to less than 2" going into it.

[jonszr1]

pete thanx for the info. we have a private track day set for nov 22. i have a desert developement 3 in ,i will try to get a x pipe added to it and ssee if it will make a little more power . will try to have it set up so i can take both and change them between rounds and see how it works on my car .it may be though that i need your wonderfull ported heads to see an improvement . also am going to try some 18 in bfgs against the mt et street radials . will post the results on the 23 rd

[cward]

I doubt if I am the right person to comment on exhaust systems as noise level inside the Z was not a concern to me. Or to my most frequent passenger, Bob. I said BOB. Both of us are deaf so neither of us try to talk to each other when we are in either his Z or mine. This being the case, I went thru 4 iterations of exhaust combinations. Each was louder than the last. The final system was headers, X-pipe and straights in 3" SS. That last system was quite loud when you hit the go pedal. It also produced the highest hp. It also lowered my torque a few lbs. No back pressure moved my rpm range up several hundred rpm. My Z was over 390 rwhp 6000 to 7500. That is a long flat curve for hp which is one of the reasons my Z had some success against higher hp cars. When racing, I was in my power range nearly all the time. Finally, I'll get to the point, it is my opinion that an exhaust system is like BBQ: Everyone has their own idea of "best". Any system that can be driven on the street legally (straight pipes considered not legal :-D) is a compromise when compared to a non-legal straight pipe system. So go listen and ride in Z's with different systems and chose the one you like the most. I imagine that most of the aftermarket systems are all within a few hp of each other unless you have a stroker. So don't worry about a couple of hp and do what you want. If a few more hp is your only consideration, then a few of us ran my type of system on the street. But be warned, when you hit the go pedal, especially at 2 am, you can hear that exhaust for miles (and so can everyone else including the cops). A Cup car was not any louder than mine at full throttle.

Curtis

[cward]

I am sorry, I probably should not have commented on this thread. I was listening to some music: "Radar Love", "Hot Rod Lincoln" and the one my wife thought was most appropriate "Livin' on a Prayer". So I commented without much thought. I was in the mood.

Curtis

[rhipsher]

did they put a crossover or x pipe in the system when they did it ? if not there is a few xtra hp in doing that
No cross over. They look like two side by side 2 1/2 ugly conduit pipes where the resonator use to be. The exhaust leaks were getting on my nerves so for $40 I took it to a muffler shop and had them weld up the leaks. As soon as I can I am going to get jeal headers and a B&B system with X pipe. And if I can't find any jeals I'll get something close. Then do the next most popular mod-port and polish plenun+injector housings. I'm the supervisor/CNC programmer/Machinist/Bosses whipping boy etc at the shop I am at. So I'd like to do my own porting and polishing. But first things first getting the exhaust squared away.

[Aurora40]

I am sorry, I probably should not have commented on this thread. I was listening to some music: "Radar Love", "Hot Rod Lincoln" and the one my wife thought was most appropriate "Livin' on a Prayer". So I commented without much thought. I was in the mood.

Curtis
I'm glad you did, and you make some good points!

I just wanted to provide my opinion of the Corsa, and how it differed from what I had previously. Certainly there are different strokes for different folks though!

[Jeffvette]

Since we are on the subject of exhaust I have a question that I have still not had a good answere for. I have a Borla system. And almost a year ago late one night I went over some railraod tracks and could kiss my resonater goodbye. You want to talk about drone! My Z sounded like a Southern Pacific frieght train comming down the road. So I measured the lenth of the res and went to midas and had them cut me two 2 1/2 inch pipes and flared one end just as a temporarely fix until I get another resonator. So my question is does running straight pipes instead of a resonator make for better breathability?


What you will find is the Borla resonator necks down to a 2.5 on the inside. Not exactly great. Adding straight pipes to the system will definitely help the flow, but you will pick up some horrible harmonics with the straight pipes.

[-=Jeff=-]

What you will find is the Borla resonator necks down to a 2.5 on the inside. Not exactly great. Adding straight pipes to the system will definitely help the flow, but you will pick up some horrible harmonics with the straight pipes.

Actually more like 2.25 or smaller and that is on the Challenge system as well

[blackjack]

Actually more like 2.25 or smaller and that is on the Challenge system as well

exact...i got rid of the bottleneck sections on my borla system,and put an x-pipe in place of the resonator...what a difference
bj

[-=Jeff=-]

exact...i got rid of the bottleneck sections on my borla system,and put an x-pipe in place of the resonator...what a difference
bj

So I have to ask, which X pipe did you use and how much did the resonance increase?. Also are you running headers?

[rhipsher]

The straight pipes are pretty quiet. But I do notice at about 2000rpm's the little round plunger you have to pull up on to put it in reverse buzzes. But it always buzzes. A little lithium grease should take care of that.

[Jeffvette]

The straight pipes are pretty quiet. But I do notice at about 2000rpm's the little round plunger you have to pull up on to put it in reverse buzzes. But it always buzzes. A little lithium grease should take care of that.


Tighten the set screw.

[Paul Workman]

exact...i got rid of the bottleneck sections on my borla system,and put an x-pipe in place of the resonator...what a difference
bj

"Splain, Lucy!" "What a difference"... in what way, zackly?:) (Also considering an X pipe fm SW = my reason for asking.)

P.

[blackjack]

ill try to explain what i did-pardon my english-apart from the bottleneck section close to the resonator,early borla systems have a sort of ring inside the pipe,about 4-5 inches in front the resonator,supposedly to cut the resonance in the car...the ring is almost an eight of an inch thick,so that cuts down the pipe to about 2.125''...i got rid of that too...i dont remember the brand of the x-pipe(2.500''),but removing the resonator,bottleneck section and the ring inside the pipe made the car a lot more responsive(seat of the pants...no dyno),still NO resonance(im half deaf!),and not loud at all(i could stand more noise)...i have stock exh. manifolds for now,but the ssw are on the shelf,waiting for winter(soon:(),along with ported heads,and hi-flow cats.
bj
91/1735

[blackjack]

almost forgot...thanks to alain rondeau for the tip on borla restrictions
bj

[Chris_32212]

i know this thread is mostly about the corsa system but i talked to the guys at EES and they told be the bought the B&B tri flow and X-pipe makes the most power on the dyno so thats why i went that route. also had SSW headers and a fidanza light weight flywheel isntalled at the same time as the B&B. i can see the difference on the tach because the needle moves faster. lol. there is some resonance around 1500-2000RPMs but i fully expected it and to me, its actually appealing. i can still have a conversation with a passenger with out rasing my voice at those RPMs which i was a little afraid of. The thing sounds ROOTHLESS when you put the hammer down and i love it. i could actually stand it to be a little louder. but im 25years old and as the saying goes, if its too loud - your too old. lol. i LOVE this exhaust system. it adds that third dimension to the driving experience. See it, Feel it, and now you definately Hear it. :thumbsup:

Chris

[Aurora40]

Just figured I'd post an update. So I do miss my old system a little. I miss the ground shaking vibration at idle. And the old-school sound of it.

From outside with the Corsa, the idle sounds a bit, ehh, metallic. More like a boat than a car. And I hate that on cold days the Corsa only blows vapor from the inboard tips. After only a week the difference in tip soot was noticeable.

Also the old system was brutal at 1000-2000 revs, and really got quiet above 2000. The Corsa is quiet in the 1-2000 rpm range. But if you cruise above, it's pretty burbly, you feel like you really should upshift.

Oddly I seem to be getting better economy. Averaging low 17's vs mid to low 16's normally. And it seems to idle smoother when cold, start up quicker, and shut down quicker. Possibly that's just a trick of the sound, and what I clue in on subconsciously.

The sound is great though. And my wife says it's much quieter in the house when I start the car up. I also love the popping burble on just about any lift-throttle situation.

[GOLDCYLON]

I also love the popping burble on just about any lift-throttle situation.


You love her too? :mrgreen:

[tomtom72]

:thumbsup: Thanks for putting a period on your Corsa system thread, Bob. I found this thread to be very helpful. Good luck with the new system & enjoy!:thumbsup:

:cheers:
Tom