C4 Exhaust thread
Instructor
Joined: Dec 2009
Posts: 100
Likes: 0
From: Flushing Michigan
Resonance??
Newbie here and am wondering what is resonance?
Also I am looking to dress up the rear of my 91 Coupe, it looks to have stock mufflers on am interested in something a bit nicer to replace them with. Having a high performance boat with BBC engine, I am very familiar with Corsa products and would recommend them for anyone in the boating world. How are they on automotive products? Second question, where is the best place to purchase exhaust products....is there a Forum Sponsor?
Also I am looking to dress up the rear of my 91 Coupe, it looks to have stock mufflers on am interested in something a bit nicer to replace them with. Having a high performance boat with BBC engine, I am very familiar with Corsa products and would recommend them for anyone in the boating world. How are they on automotive products? Second question, where is the best place to purchase exhaust products....is there a Forum Sponsor?
Safety Car
Joined: Dec 2008
Posts: 3,588
Likes: 10
From: North New Jersey
Resonance- Acoustics Intensification and prolongation of sound, especially of a musical tone, produced by sympathetic vibration.
Pretty much it is the drone noise that you hear in the interior of your car that can give you a headache. It is a certain frequency of noise that is usually found around 2000-3000 rpm range. Hard to explain, easy to recognize! Pretty much, Corsa is the only exhaust that will give you no (minimal) drone. All the others will give you some drone; some worse than others. The resonator is supposed to limit the amount of drone/resonance in your Vette, and it does work to a certain degree.
Hope this clarifies what resonance is...
Pretty much it is the drone noise that you hear in the interior of your car that can give you a headache. It is a certain frequency of noise that is usually found around 2000-3000 rpm range. Hard to explain, easy to recognize! Pretty much, Corsa is the only exhaust that will give you no (minimal) drone. All the others will give you some drone; some worse than others. The resonator is supposed to limit the amount of drone/resonance in your Vette, and it does work to a certain degree.
Hope this clarifies what resonance is...
Burning Brakes
Joined: Nov 2009
Posts: 813
Likes: 0
From: Fort Worth TX
I really like the sound of the chambered corvette central exhaust video posted in the OP. I think I'm going to go to the local shop and have 2.75 straight pipe welded in place of the mufflers and I'm not sure if I want just an x pipe or a magnaflow center res w/ x pipe. Any suggestions?
Drifting
Joined: Feb 2008
Posts: 1,682
Likes: 3
From: Coatesville PA
I got a kinda out there question. I bought the magnaflow muffler set on my 94(part 15623 i think?) and had the exhaust shop make me a cat back to connect with it. Horrible resonance honestly considering i drive it literally everyday. Then had an x pipe installed and it quieted it down a bit and cut resonance a little. Just worried if i installed full headers and bullet cats its gonna be way too loud. So anyone have any experience switching from an x pipe to magnaflows dual in/out resonator/xpipe? with or without headers?
Burning Brakes
Joined: Nov 2009
Posts: 813
Likes: 0
From: Fort Worth TX
I was getting the c4 aligned the other day, and I asked the guy about what he thought of my exhaust plans. I told him that I wanted to replace the mufflers with straight pipe and replace the center res with an x pipe. He said it would sound awful and that I should put flowmasters on. Any comments?
Le Mans Master
Joined: Feb 2000
Posts: 9,600
Likes: 88
From: Springfield PA
Philly 'Burbs Events Coordinator
I was getting the c4 aligned the other day, and I asked the guy about what he thought of my exhaust plans. I told him that I wanted to replace the mufflers with straight pipe and replace the center res with an x pipe. He said it would sound awful and that I should put flowmasters on. Any comments?
That is exactly what I have on my ZR1 and it is outstanding
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Drifting
Joined: Feb 2008
Posts: 1,682
Likes: 3
From: Coatesville PA
I think alot of exhausts are stereo typed (but true) to certain cars. AKA flowmaster=mustangs, SLP=camaro/transam, corsca/magnaflow=C4. Though certain random combinations of headers, midpipes or resonators, and mufflers do sound amazing.
Safety Car
Joined: Sep 2006
Posts: 4,129
Likes: 1
From: Pasadena CA
Here's a couple of short flybys of my LT4 with muffler elims and the stock resonator. Also stock headers and cats. So you can get an idea of the sound in normal driving, if you're thinking about doing it
Melting Slicks
Joined: Jan 2003
Posts: 2,813
Likes: 1
From: JOPPA MD
This is a great thread, with many great response's / opin's. This should open up a lot of minds when trying to figure out cost vs sound produced / wanted.
I have had both the Billy Boat's and the Corsa systems. Both systems were on ZR-1's (no headers). I prefer the Corsa's....the sound is unmistakable and are indeed fully functional. They have the more European raspy sound (Ferrari /Lambo) to them as opposed the low drone of the B&B's. I felt my B&B's made my car sound more like a boat, than a car, no pun intended. Both are nice systems, I guess its what the owner is really after, performance / sound quality or both, that will detemine his purchase. As for the home made systems on here, they are definitely an option if you have the shop or can do most of the work yourself....and definitely worth the monies!
I do have one question....Somewhere on another thread, I read that Corsa does not produce the stamped outlet's (the exhaust tip with Corsa on the top) any longer. Is this true and if, it is, when did they stop?
Stay in tune....
I have had both the Billy Boat's and the Corsa systems. Both systems were on ZR-1's (no headers). I prefer the Corsa's....the sound is unmistakable and are indeed fully functional. They have the more European raspy sound (Ferrari /Lambo) to them as opposed the low drone of the B&B's. I felt my B&B's made my car sound more like a boat, than a car, no pun intended. Both are nice systems, I guess its what the owner is really after, performance / sound quality or both, that will detemine his purchase. As for the home made systems on here, they are definitely an option if you have the shop or can do most of the work yourself....and definitely worth the monies!
I do have one question....Somewhere on another thread, I read that Corsa does not produce the stamped outlet's (the exhaust tip with Corsa on the top) any longer. Is this true and if, it is, when did they stop?
Stay in tune....
Burning Brakes
Joined: Aug 2004
Posts: 771
Likes: 0
From: Washington District of Columbia
Questions??
Informative thread. I've been wanting an aftermarket exhaust for a while. Most interested in a Corsa system. My question: How do you select the pipe size? I've seen sizes from 1 7/8" to 3"s. I have a stock LT1. Strickly street-no racing. What size is suitable for me. Also, cat or no cat? Is the word "cat", as its refered to, the catalytic converter or a
muffler of some sort or something totally different? I need to know if I
need this as I reside in D. C. THANKS
muffler of some sort or something totally different? I need to know if I
need this as I reside in D. C. THANKS
Team Owner
Joined: Jan 2009
Posts: 73,568
Likes: 33
From: Somewhere in Mo
St. Jude Donor '09-'10, '14
Informative thread. I've been wanting an aftermarket exhaust for a while. Most interested in a Corsa system. My question: How do you select the pipe size? I've seen sizes from 1 7/8" to 3"s. I have a stock LT1. Strickly street-no racing. What size is suitable for me. Also, cat or no cat? Is the word "cat", as its refered to, the catalytic converter or a
muffler of some sort or something totally different? I need to know if I
need this as I reside in D. C. THANKS
muffler of some sort or something totally different? I need to know if I
need this as I reside in D. C. THANKS
Corsa sells their systems as a complete system, for the C4 and probably most vettes, from the cats back. This is from Corvette Central just select the appropriate system for your car. I am not promoting CC, just using them as an example.
I don't know if you can purchase just part of the system or not. I know I haven't found just the mufflers for my L98. It's the complete system or nothing. magnaflow does sell just the mufflers for the LT1 for $415.00. And IMO just as good in both looks and quality of the Corsa. I have listened to video after video of every muffler I can find on youtube and I always go back to the Magnaflows for the sound I like.
something else I might add is that from my research on an LT1 your only going to get a a fraction of performance increase if any. Seems the LT1 and beyond had a pretty good stock system.
Heres the link
http://www.corvettecentralexhaust.co...ance_corsa.php
Oh, you can also listen to magnaflows on CC's website.
Last edited by RetiredSFC 97; Jan 7, 2010 at 10:12 AM.
Burning Brakes
Joined: May 2009
Posts: 787
Likes: 1
From: Hialeah Florida
I just want to make it clear that the Billy Boat Exhaust systems do not sound good on camera! There tone is too deep for a camera to accuratly produce. I have the 3 inch Billy Boat Exhaust without a resonator and it sounds amazing. It has a deep muscular tone at idle and at WOT it stays deep. Without a resonator I get no resonance. Which is wierd when I had the stock resonator the system was quieter and had resonance from 1700 rpm to like 2500 rpm. I love my Exhaust and the sounds turn heads everywhere I go.
Burning Brakes
Joined: May 2009
Posts: 787
Likes: 1
From: Hialeah Florida
But, the Corsas and Billy Boats really caught my eye when I was looking for exhaust systems.
I ended up going with the Billy Boats because they seemed to have a lower "muscle car" sound to them. The Corsas seemed a bit louder.
Now that I have my Billy Boats - I'm kind of sad that they aren't louder. I kind of expected a bigger sound out of them.
Anyway, I love the looks of the Billy Boats and I went stainless - so I'm going to have these puppies for awhile.
This thread is looong overdue and a great start. I agree with above. I searched and searched and ended up going with the B&B 3" for my 95 vert and overall I am very satisfied. Yes they do have drone around the 1500 range but only and only when there's a low strain on the trans. If you switch to D vs OD (auto) there's barely any noise inside. Looks and stainless is why I went with the B&B and was happy to see the quality of the build when they came. Fit perfectly with no mod needed.
I was happy with the new lower old school muscle car sound but was surprised that they weren't louder outside (not much more than stock). The deep tone is a thing of beauty though and what an American car should sound like.
One of peeves about most of these exhaust discussions is about the resonance. If you don't want to hear your exhaust, save your money and stick with the more than adequate stock system. If you want power, put that money into your engine. I personally love the look and sound of the B&B and got it on sale from MidAm for 900 shipped.
I ended up going with the Billy Boats because they seemed to have a lower "muscle car" sound to them. The Corsas seemed a bit louder.
Now that I have my Billy Boats - I'm kind of sad that they aren't louder. I kind of expected a bigger sound out of them.
Anyway, I love the looks of the Billy Boats and I went stainless - so I'm going to have these puppies for awhile.
This thread is looong overdue and a great start. I agree with above. I searched and searched and ended up going with the B&B 3" for my 95 vert and overall I am very satisfied. Yes they do have drone around the 1500 range but only and only when there's a low strain on the trans. If you switch to D vs OD (auto) there's barely any noise inside. Looks and stainless is why I went with the B&B and was happy to see the quality of the build when they came. Fit perfectly with no mod needed.
I was happy with the new lower old school muscle car sound but was surprised that they weren't louder outside (not much more than stock). The deep tone is a thing of beauty though and what an American car should sound like.
One of peeves about most of these exhaust discussions is about the resonance. If you don't want to hear your exhaust, save your money and stick with the more than adequate stock system. If you want power, put that money into your engine. I personally love the look and sound of the B&B and got it on sale from MidAm for 900 shipped.
Le Mans Master
Joined: Dec 2003
Posts: 5,768
Likes: 33
From: Van Steel Corvettes
St. Jude Donor '12-'13
A cat back system bolts from BEHIND the cats and replaces everything from there to the tips. Other systems will just replace mufflers and may not be bolt on. Most cat-backs are a bolt on affair.
Team Owner
Joined: Jan 2009
Posts: 73,568
Likes: 33
From: Somewhere in Mo
St. Jude Donor '09-'10, '14
On the early C4 it is this
http://www.parts123.com/parts123/yb.dll?parta~partsort
On the 92 to 96 it is this
http://www.parts123.com/parts123/yb.dll?parta~partsort