Dual Exhaust
Thread Starter
Racer
Joined: Nov 2003
Posts: 386
Likes: 1
From: Grafton WV
Dual Exhaust
Just got this article out of Corvette Chevy Trader March 2004:::
All engines will perform better if they can breathe better, but in the real world your Corvette will gain little or no additional performance from a genuine dual exhaust system. In general, engines with radical camshaft profiles and other super high performance characteristics will benefit from a larger exhaust system far more than more mundane engines. Some of the outrageous engines from the 1960s, such as the L88, or a custom racing spec engine, really do need true dual exhaust, but your 1980 does not and you will feel no difference between that and a high quality, low restriction system that feeds into a single catalytic converter...
Now do you all think this is a True Statement ????
:steering:
All engines will perform better if they can breathe better, but in the real world your Corvette will gain little or no additional performance from a genuine dual exhaust system. In general, engines with radical camshaft profiles and other super high performance characteristics will benefit from a larger exhaust system far more than more mundane engines. Some of the outrageous engines from the 1960s, such as the L88, or a custom racing spec engine, really do need true dual exhaust, but your 1980 does not and you will feel no difference between that and a high quality, low restriction system that feeds into a single catalytic converter...
Now do you all think this is a True Statement ????
:steering:
Le Mans Master
Joined: Jan 2003
Posts: 6,575
Likes: 1
From: Tuttle OK
Cruise-In VIII Veteran
Re: Dual Exhaust (Yeller81USNRet)
It's their story, they can tell it however they want...However, I disagree. Might be in my own mind, but when I got rid of the cat and went true dual, I experienced a noticable difference...
Racer
Joined: May 2003
Posts: 477
Likes: 0
From: KS
Re: Dual Exhaust (Yeller81USNRet)
I'd ask them to define "high quality, low restriction system that feeds into a single catalytic converter..." If it's the OEM setup for the '81, I'd say they're smoking something, because the OEM pipes aren't mandrel bent.
Drifting
Joined: Apr 2003
Posts: 1,323
Likes: 2
From: Castle Hills Texas
Re: Dual Exhaust (Yeller81USNRet)
I just had my 2-1-2 system on my '80 converted for a grand total of $80.00 bucks and I can't really tell a huge difference other than it sounds a ton better. It actually sounds like I have Flowmasters on my car where as before my Flowmasters were a bit more subdued sounding. Of course, I don't get on my car to often. It is 24 years old in May and I am trying to make the parts on it last as long as I can. The one thing I did notice is that it does not seem to slow down as fast when I get off the gas, like there is not as much backpressure to cause engine braking. The sound difference alone was worth the $80 bones it cost to do the pipes.
Melting Slicks
Joined: May 2003
Posts: 2,253
Likes: 1
From: Rochester Kent
Re: Dual Exhaust (Yeller81USNRet)
Well , all I can say is that when I installed true duals on my '81, I noticed a significant difference and it sounded a whole lot better. I think that this is a must mod for anyone that has a 2-1-2 system. Only my $0.02 worth
Race Director
Joined: Apr 1999
Posts: 11,520
Likes: 13
From: CORVETTE 77 385 C.I. TEXAS
Re: Dual Exhaust (Yeller81USNRet)
See Why Exhaust is problem for HP on 75-81
Many refer to it as my Exhaust topic. http://www.corvettefaq.com/c3/ganeyexhaust.htm
Later cars like a 86-88 SS Monte Carlo have a large oval into & out of the cat. which would help those retaining the basic stock type setup.
The topic above was written for guys that want to seriously increase power. The first thing one would do w/ a L-88 is headers & better exhaust.
:cool:
Many refer to it as my Exhaust topic. http://www.corvettefaq.com/c3/ganeyexhaust.htm
Later cars like a 86-88 SS Monte Carlo have a large oval into & out of the cat. which would help those retaining the basic stock type setup.
The topic above was written for guys that want to seriously increase power. The first thing one would do w/ a L-88 is headers & better exhaust.
:cool:
Safety Car
Joined: Mar 2000
Posts: 4,078
Likes: 27
From: Northeast South Dakota
Re: Dual Exhaust
Whoever wrote that article obviously spent too long standing in the smoke. :rolleyes: Engines that breath better make more power. I think they should have said that heads and cam make more results than true duals, but any one of the three help.
-Justin
[Modified by Dalannex, 11:16 AM 2/26/2004]
-Justin
[Modified by Dalannex, 11:16 AM 2/26/2004]
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Melting Slicks
Joined: Aug 2003
Posts: 2,135
Likes: 2
From: Dayton Oh
Re: Dual Exhaust (Yeller81USNRet)
Ditched mine and went with true duals. Mine are chambered w/o H or X pipe. I'm thinking about converting to the H or X to mellow out the sound a little. Anyway, for me sounding fast is almost equally important to running fast. :cheers:
Pro
Joined: Nov 2003
Posts: 543
Likes: 3
From: Camden AR
Re: Dual Exhaust (Dalannex)
I think when you think about all the mods we do that increase power by 1-5hp...when you look at exhaust...the price to benefit ratio is unbelievable...even if it's nowhere as good as everyone says...
my true dual exhaust cost:
hedman headers $450
pipes (installed) $100
you just can't beat that!
my true dual exhaust cost:
hedman headers $450
pipes (installed) $100
you just can't beat that!
Burning Brakes
Joined: Aug 2000
Posts: 1,143
Likes: 0
From: Charlotte NC
Re: Dual Exhaust (Ganey)
See Why Exhaust is problem for HP on 75-81
Many refer to it as my Exhaust topic. http://www.corvettefaq.com/c3/ganeyexhaust.htm
Later cars like a 86-88 SS Monte Carlo have a large oval into & out of the cat. which would help those retaining the basic stock type setup.
The topic above was written for guys that want to seriously increase power. The first thing one would do w/ a L-88 is headers & better exhaust.
I couldn't agree more. I installed the chambered MAD duels on my 76 and although I don't have dino numbers, I have no doubt there was a noticable improvement (SOP) which I attribute mostly to the removal of the cat, and secondly to the duals.
:cool:
Many refer to it as my Exhaust topic. http://www.corvettefaq.com/c3/ganeyexhaust.htm
Later cars like a 86-88 SS Monte Carlo have a large oval into & out of the cat. which would help those retaining the basic stock type setup.
The topic above was written for guys that want to seriously increase power. The first thing one would do w/ a L-88 is headers & better exhaust.
I couldn't agree more. I installed the chambered MAD duels on my 76 and although I don't have dino numbers, I have no doubt there was a noticable improvement (SOP) which I attribute mostly to the removal of the cat, and secondly to the duals.
:cool:
[Modified by Fang S-289, 6:05 PM 2/26/2004]
