Flowmaster and Chip Installed

[Hammer]

Hey everyone,

I installed the Flowmaster #17115 Cat Back and a Haibeck standard chip this weekend. I am quite happy with the performance and am looking forward to hitting the strip to see what he'll do now. Seat of the pants tells me the car drives better and is a little crisper on the throttle now. There is no resonance from the exhaust except way low in the power band, around 1200 rpm when climbing a small hill is all I noticed. There is a real nice sound when on the throttle and it is quiet at idle.

The system cost $569.95 @ Summit Racing and there is an extra $6.00 shipping fee along with a $10.95 handling fee. I took advantage of those fees and also ordered a new serpentine belt and exhaust wrapping for the system.

[We Gone]

:cheers: Same set-up here..going to the dyno on Sat to see what the gains are...Was 326rwhp bone stock @ about 18K miles in 02 now has 43K miles should be about broken in now :mrgreen:

Steve

[blackjack]

cant wait to see your results:-D
bj

[DaveK]

Congratulations John, glad you can see some improvement. :dancing

I plan on getting the chip from Haibecks too when I can, so its nice to get some feedback from someone who's done it. According to the previous owner mine has a Corsa exhaust which presumably is similar to the Flowmaster set up.

Lots planned, will have to take my time though. :)

[tccrab]

I just put a Haibeck prom and flowmaster mufflers on my '90 and I'm *VERY* happy.
My seat 'o pants dyno tells me the car is a bazillion times cooler and maybe smidge faster.
The prom was by far the best investment. My idle was never anywhere near 650, in fact it was all over the board, and it had cold start issues. I used to have to feather the throttle on cold start to keep it from loading up and dieing. Not any more. Turn the key, vrroom, 650 rpms. :-D Pull up to a stoplight, 650rpms. :-D:-D It used to idle around 850-1100 at a stoplight.

The flows just add to the cool factor, not loud, definately deeper tone, maybe just a itsy bitsy, teeny tiny amount of resonance at about 1500 rpm, but heck, who runs a LT5 at 1500 rpm? From the back at idle it sounds kinda like a Ferrarri, kind of a "burbly" sound.

:thumbsup::thumbsup:
TomC

[guinnessdood]

Hey everyone,

I installed the Flowmaster #17115 Cat Back and a Haibeck standard chip this weekend. I am quite happy with the operformance and am looking forward to hitting the strip to see what he'll do now. Seat of the pants tells me the car drives better and is a little crisper on the throttle now. There is no resonance from the exhaust except way low in the power band, around 1200 rpm when climbing a small hill is all I noticed. There is a real nice sound when on the throttle and it is quiet at idle.

The system cost $569.95 @ Summit Racing and there is an extra $6.00 shipping fee along with a $10.95 handling fee. I took advantage of those fees and also ordered a new serpentine belt and exhaust wrapping for the system.Wanna race?:cheers: :mrgreen: Much schweeter sound I'm sure...!

Uly

[FU]

The MOD bug commeth.
Lift iff the plenum and injector housings and get them done too :D

[Demps]

About time. Weather is getting better! Bet Firebird will be crowded on the first night. Ted

[Hammer]

About time. Weather is getting better! Bet Firebird will be crowded on the first night. Ted

I just sent an iCalender to you. I am thinking that will be the first time I'll get out there. Long ways away, but I can't see going on the T & T earlier that month. We'll talk before then.

[Hammer]

:cheers: Same set-up here..going to the dyno on Sat to see what the gains are...Was 326rwhp bone stock @ about 18K miles in 02 now has 43K miles should be about broken in now :mrgreen:

Steve

Please be sure to post your results or send me a PM or email. I am quite anxious to see what they actually might have picked up. I am thinking, based on Marc's and Hib's posted numbers, that around 22 HP would be what we are shooting for. The TQ and HP curves should be way better though.

[jonszr1]

how many pkgs of wrap did you get ? tell us how it changed things when you get it done.

[Hammer]

how many pkgs of wrap did you get ? tell us how it changed things when you get it done.

I got the DEI kit that includes 2 50' rolls of the wrap, 1 can of high heat paint (choice of colors) 4-14" SS ties and 8-9" SS ties. The 9" ties don't fit around the pipes so I was forced to use one wrap at each side of the resonator and just use the 14" ties at the starting and ending points. Started at one end by a muffler and crossed to the other side and back to the other muffler, then started at one of the head pipes and crossed to the other side and back to the opposite head pipe. I used 1 roll (50 ft) of the DEI wrap with about a foot left over. Then I painted everything that wasn't wrapped, even though the DEI instructions said to paint the wrap. I didn't have enough paint to do the wrap and the pipes too.

If I was to do it again I would get the following:
1 - 50' x 2" roll DEI Wrap $39.88
1 - 15' x 2" roll DEI Wrap $13.88
2 - Cans DEI Hi Temp Silicon Paint $6.95 EA
8 - 14" SS Ties (4 /pk or 2 pks) $7.95 EA

Total would be $83.56, just slightly more than the DEI kit of $79.95, but this would be a much better way to go as you would have plenty of material and wouldn't have to push it like I did. I did get the job done and that is what matters. Hib did an article on this, Corvette Action Center, I think it was called Silent Power or Quiet Power. He has some good pics of the wrapping on there and recommended the DEI as an alternative to the Thermo-Tec. Don't use the Summit wrap, it is cheaper but is only rated to 1250d, the DEI is rated to 2000d.
http://www.corvetteactioncenter.com/kb/question.php?qstId=534

As far as changing things, I never paid any attention to the heat generated so I can't comment on that. From the inside, the common faint howl that is emitted from the stock exhaust has been intensified. I like it and I don't have the resonance everyone talks of. All in all it was a very nice mod and I can't wait for the Dyno test results from Steve.

With the addition of the chip the car idles better, is crisper and you don't have to worry about remembering to turn the GD key on. Of course I am sure I am the only one to forget that right :sign10:.

I will post when I have driven the car more and gotten some track times to see if it helped there. That will be just after mid April.

[We Gone]

Please be sure to post your results or send me a PM or email. I am quite anxious to see what they actually might have picked up. I am thinking, based on Marc's and Hib's posted numbers, that around 22 HP would be what we are shooting for. The TQ and HP curves should be way better though.

Will do Marc guessed at about the same gains when I talked with him. I will be happy if I pick up a solid 20HP :mrgreen:

:hello: Ted (Demps)....Ted ran the right foot for me on my first dyno at SGC back in 02 :cheers:

[Peaven]

All of this talk has got the mod bug biting me hard....must..resist...(until bank account can support it).:-({|=

As for mine, I've got the Haibeck prom and 3" straight exhaust on mine. I hope to make it to BG and get her on the dyno there.:cheers:

[GrayZ]

All of this talk has got the mod bug biting me hard....must..resist...(until back account can support it).:-({|=

As for mine, I've got the Haibeck prom and 3" straight exhaust on mine. I hope to make it to BG and get her on the dyno there.:cheers:

life's short..peav's...don't eat for a week....with the money you save
on food in just one week...you should be able to go to BG and Back,
a couple of times...:mrgreen:

here's what it looks like at Dyno..@ Bowling Green

http://i76.photobucket.com/albums/j9/kmoudy/My%20zr1%20photos/Picture068.jpg

[Peaven]

life's short..peav's...don't eat for a week....with the money you save
on food in just one week...you should be able to go to BG and Back,
a couple of times...:mrgreen:

here's what it looks like at Dyno..@ Bowling Green

http://i76.photobucket.com/albums/j9/kmoudy/My%20zr1%20photos/Picture068.jpg

That's easy for you to say Keith, with the mods I want I'd have to permanently go on Stalin's Gulag diet....however....I'm 60% sure I'm BG bound, will know for sure within the next week.:dancing

BTW, what did your black beast dyno at last year? You can pm me if you're too embarrassed to post it here.:mrgreen:

[ralph92ZR1]

I have some Xmas money burning a hole in my pocket; am considering the Flowmasters. Was this a pretty simple bolt-on or is cutting and / or welding needed.

Thanks :handshak:

[1990 quasar blue]

I have some Xmas money burning a hole in my pocket; am considering the Flowmasters. Was this a pretty simple bolt-on or is cutting and / or welding needed.

Thanks :handshak:

The kit is a straight forward bolt on. Just get some better clamps such as http://www.jegs.com/webapp/wcs/stores/servlet/product_10001_10002_753274_-1_11527 remember you'll need one in 2.75" and the rest in 2.5".

[jonszr1]

also before you buy ck summit their price about 570 alot of others 750 and up :mrgreen:

[Hammer]

What Quasar and Jon said. It took about 6 hours but I installed it, tightened the clamps, removed it, wrapped it, painted it and reinstalled it. I tightened the clamps with air and broke only one clamp. The fit at the back of the :o radiator :o (I meant) resonator was a little loose but there was no leak. Nice deal for the price and combined with the Haibeck chip, should add about 20 to 25 horses.


If you do this exhaust and want part numbers let me know, I would be happy to help. Order the chip from Marc on Monday and it should be there by Thursday at the latest.

[1990 quasar blue]

should add about 20 to 25 horses.
I hope your right as that would be a nice gain. The above plus ported plenum and injector housings gave me 35 at the wheels. However, there might be a bit more in the tune. It's tough to get a tune spot on from another time zone.

[jonszr1]

have you cked around to see if there is a tuner in your area. ithink he should be able to modd your chip. aren't the vet doctors in your area?

[1990 quasar blue]

Yeah the Docs are only a few hours from me but I'm almost positive that they log the info and send the chip out to someone else to make the changes. At least thats what I was told. I will know soon enough as the car is going to them for a few things anyway.

[jonszr1]

I have C.R.S. don,t you have ported inj housings and plenum plus headers &flowmaster ex. If so those are the same mods as I have . you could call corey @ H.P.T. (830)620 1117 and ask him to copy my tune put it on a prom and send it to you My car came out @ 409.9 hp & 373 tq. I'll bet the tune would be pretty darn good . Might be cheaper too in the long run . just tell him you want the 409.9 hp tune . tease him and tell him you want a full 410:mrgreen:

[thxalot]

Anybody got pics of the Flowmaster tips? What do they look like? Any trouble in getting them lined up with the body work. I hear that alignment is one of the tricky parts of adding an exhaust system.

Who does custom PROM burns out here in So Cal? Anyone know?

Thanks,

-Burt

[jonszr1]

I do know a guy but its 300 for the prom and 200-300 for the dyno time . If you have headers & flowmasterex & ported inj and plenum . then your mods are the exact the same as mine .I would just have corey burn you a prom with my programming in it i would bet it would be within 3-5 hp of max for your car . he put mine on the dyno so it isnt a generic prom. but if you really want the so cal guy pm me and ill give you his info .he does have the soft ware to do zr1s. hope this helps.

[ralph92ZR1]

Thanks, I will order the kit and the clamps. What is the story on the wrap? and the reason for painting a system that is aluminized??

Thanks guys for the advice...

[thxalot]

As I read it the reason for the wrap and paint is to keep the exhaust heat from getting inside the cabin (or too close to melty parts on our plastic fantastics).

That's a good idea to use Corey's cal. I wasn't planning to go with headers though. Like Hib, I was thinking about sticking with the factory manifolds.

[jonszr1]

Corey is really talented in the tuning area. plus his pricing is very fair. if you let him know everything i will bet he can come really close on the tune . he was the first one to be able to tune out a knock event my car had on the dyno. he may allready have a tune in his computer with your modds . just tell him that lone pine guy sent ya.:mrgreen:

[Hammer]

Anybody got pics of the Flowmaster tips? What do they look like? Any trouble in getting them lined up with the body work. I hear that alignment is one of the tricky parts of adding an exhaust system.

Who does custom PROM burns out here in So Cal? Anyone know?

Thanks,

-Burt

I'll post some pics tomorow morning.

[1990 quasar blue]

I have C.R.S. don,t you have ported inj housings and plenum plus headers &flowmaster ex. If so those are the same mods as I have . you could call corey @ H.P.T. (830)620 1117 and ask him to copy my tune put it on a prom and send it to you My car came out @ 409.9 hp & 373 tq. I'll bet the tune would be pretty darn good . Might be cheaper too in the long run . just tell him you want the 409.9 hp tune . tease him and tell him you want a full 410:mrgreen:

I have all of the above except headers and the car made 355 @the wheels. (320/320 stock) I have been in contact with Corey about a few things, I think I should inquire about that specific tune as well. 409.9 is a great number. How much do you think the Fidanza is worth? Maybe 10-15? Thanks Jon.

[Hammer]

Anybody got pics of the Flowmaster tips? What do they look like? -Burt

http://i85.photobucket.com/albums/k60/HammerZR1/ZR-1%20Pics/IM000198.jpg
http://i85.photobucket.com/albums/k60/HammerZR1/ZR-1%20Pics/IM000199.jpg
http://i85.photobucket.com/albums/k60/HammerZR1/ZR-1%20Pics/IM000200.jpg
http://i85.photobucket.com/albums/k60/HammerZR1/ZR-1%20Pics/IM000202.jpg
http://i85.photobucket.com/albums/k60/HammerZR1/ZR-1%20Pics/IM000203.jpg

[jonszr1]

on the fidenza i would gues 5 to 10 . if your calling corey he would know better than me . the cool thing is how fast it revs up . takeing 35 lbs of the end of the crank really changes stuff . the 410 are cool to but ya gotta watch first gear you can blow the tires off real easy.:mrgreen:

[1990 quasar blue]

on the fidenza i would gues 5 to 10 . if your calling corey he would know better than me . the cool thing is how fast it revs up . takeing 35 lbs of the end of the crank really changes stuff . the 410 are cool to but ya gotta watch first gear you can blow the tires off real easy.:mrgreen:

I wish that you still had the 3.45's. Then I could get your opinion on launching as well as overall drivability with the Fidanza. Everytime I start leaning towards it I read where someone says it's the worst thing they've ever done. They say it's tough taking off easy without revving it up and launching also becomes more difficult, nevermind the noise. Granted, the guys that dislike it are usually driving an LT1 or LT4. I'm not sure how different it would be with an LT5. I don't imagine much.

[jonszr1]

oh i should have told you that I put the fidanza in 11/2 years ago . i put 25 k miles on the car with 3.45s in it.The key i feel is making sure you use a sprung disc ( one with springs ) I could start the car moving from a stop with out using the gas unless I popped the clutch. I also love the ceramic disc. to me the best set up would be 3.73 gears if you go beyond headers and ex. when the porting gets done 1st gear is a joke you can't keep from blowing the tires off the car. others may not like the aluminum flywheel but to me that is one of the first things i would do. the car really revs so much faster.It also has to be easier on the bearings with out that 45lb flywheel on the end of the crank:mrgreen: hope that helps

[4DSZR1]

http://i85.photobucket.com/albums/k60/HammerZR1/ZR-1%20Pics/IM000198.jpg
http://i85.photobucket.com/albums/k60/HammerZR1/ZR-1%20Pics/IM000199.jpg
http://i85.photobucket.com/albums/k60/HammerZR1/ZR-1%20Pics/IM000200.jpg
http://i85.photobucket.com/albums/k60/HammerZR1/ZR-1%20Pics/IM000202.jpg
http://i85.photobucket.com/albums/k60/HammerZR1/ZR-1%20Pics/IM000203.jpg



Hey John, I was admiring the pictures and noticed you've wrapped the exhaust pipes....how come?

Thanks
Rick

[jonszr1]

unforunatly that pretty red car isn't mine. but the reason behind it is 2 fold . 1 less heat into the interior of the car and 2 ,by keeping the heat in the pipe helps keep the exhaust moving faster. from what I understand heat kept in helps the velosity. hope that helps others more than likely know a bunch more about this than I.hope that helps:cheers:

[Hammer]

Hey John, I was admiring the pictures and noticed you've wrapped the exhaust pipes....how come?

Thanks
Rick

Cause Hib did his that way...! Actually Jon's description above is the reason. There's an article on CAC about how Hib did his exhaust and this all made sense to me. It is the one on Quiet HP.

You're welcome.
John

[thxalot]

John,

Thanks for the excellent pics. Very illuminating!

[4DSZR1]

Great info,

Thanks

[Jeffvette]

I have all of the above except headers

Headers are going to make the biggest difference. The amazing thing is you won't see full potential of porting or headers until you do them both.

[1990 quasar blue]

Thanks Jeff, do you think I might gain more than the typical 20 hp since the porting is already done? I know way back when you went from ~350 to ~390 Also were you still running the stock flywheel then?

[Jeffvette]

Actually went from 339 to 391 (58mm TB) with just porting and headers. I know 400 was there with tuning. Was still running the stock flywheel.

Combined they are worth roughly 50 RWHP. Seperately the porting alone may give you 15-20 and then the headers make up the rest and vice versa.

[jonszr1]

I agree with jeff 100% if you got the porting done . YOUHAVE TO DO HEADERS:mrgreen: . IF you do that ., all we will see is that smiley face. your car will go nuts with headers. otherwise its like taking a shower with a raincoat on. you think it sounds nice up high wait till you do headers she goes right to the rev limiter without laying over . downside is you might not ever want to get out of the car again. jmho

[bobbyhi]

My '90 is going down to Marc's in April for headers. The top end has been P&P already. I have Power Effect exhaust. Is there any advantage (HP) to taking out the resenator and going with piping? Will the car be too loud?? (I guess that is one's preference). I also have 409 gears. According to the other posts that this makes 1st gear useless. I don't race my car except for a little street racing. Also, will a Fidanza flywheel make much difference other than more noise??

[jonszr1]

the light weight flywheel lets her rev alot quicker:mrgreen: . i replaced my flowmaster resonator withan ultra flow x pipe muff. got the 3 in .I like it sneeky fast . makes it more fun and the boys in blue don't look at you so much. i had one exhaust without the res with an x pipe instead and I had to by excedrin before I want anywhere . but thats just me . once you get used to feathering the gas first gear is ok but its an aquired feel. but if ya stomp on her in first gear tires seem to just melt away .

[ArcticZR1]

.

[ArcticZR1]

OK I'm getting scared now...I just bought a B&B with the X pipe and they refused to throw in ANY aspirin for free! It's due at the end of the month. I actually got a pretty good deal. $975.00 Drop shipped brand new to my house with the X pipe. This is the first MOD my car has seen since 91'...but not the last! There is another guy on the Corvette Forum selling a flowmaster for a ZR1 used but the whole system for like $200 or something if anybody was interested.:icon_scra

"i want to sell a hardly used flowmaster cat back system complete for a 91 zr1
lloyd 973-256-1031 asking 175.00"

I called him a week ago and he still had it for sale but I went with the B&B.

[jonszr1]

Welcometo brain pain. I felt like the resonance would never leave my head . but really if you like a loud exhaust b&b is a great flowing system enjoy

[thxalot]

Lloyd is out in NJ and won't ship the Flowmaster setup. It's a great deal for any of you East Coasters.

Jon, is the Ultra Flow X-pipe + muffler even quieter than the original Flowmaster setup?