How much gain?
Thread Starter
Race Director
Joined: Feb 2006
Posts: 13,138
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From: Inside the woods living my passion
St. Jude Donor '07-'08
How much gain?
Going to true dual exhaust from factory on a 82 ? Also all of you that did where did you get it and what mufflers sound the best??
Safety Car
Joined: Jun 2004
Posts: 4,652
Likes: 80
From: Lakeland Florida
Hello,
You should check on the smog laws in your state before you undertake this type of change. I think that removing the catalytic converters is against the law in most of the states.
But IF.....this is for off road use only ( disclaimer ) then you can probably look up what is needed for a 1968 -1974 corvette exhaust system to find out what pipes and cross overs are needed to convert your car. I am looking at several catalogs that say a 10 - 25 hp increase can be realized with various muffler systems. The price of a dual exhaust pipe system from a catalog is only $300 without mufflers and hangers.
kdf
You should check on the smog laws in your state before you undertake this type of change. I think that removing the catalytic converters is against the law in most of the states.
But IF.....this is for off road use only ( disclaimer ) then you can probably look up what is needed for a 1968 -1974 corvette exhaust system to find out what pipes and cross overs are needed to convert your car. I am looking at several catalogs that say a 10 - 25 hp increase can be realized with various muffler systems. The price of a dual exhaust pipe system from a catalog is only $300 without mufflers and hangers.
kdf
Race Director
Joined: Nov 2000
Posts: 16,416
Likes: 1
From: NC,USA
If its an 82 305 Cali motor it'll help... but, it'll still be what it is.
All the rest will bump it back up to what the same displacement, similar compression engines of previous years did.
Dont be suprized if it sounds a bit more like a lawn mower than a high perf car though. 80-82 the general was still using tiny cams.
All the rest will bump it back up to what the same displacement, similar compression engines of previous years did.
Dont be suprized if it sounds a bit more like a lawn mower than a high perf car though. 80-82 the general was still using tiny cams.
Race Director
Joined: Aug 2002
Posts: 17,198
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From: Boone NC home of 3peat National Champs ASU Mountaineers
St. Jude Contributor
I put super turbos from Dynamax on my Vette. Ordered them from Summit racing.com. True duals from Mid American, had to get a muffler shop to weld it together. It sounds pretty good not much roar in the cockpit.
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Racer
Joined: Dec 2004
Posts: 379
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From: Fairfield Texas
Just put the true duals system from Mid America on My 79 L48 auto
and I noticed a increase in performance even with this low horsepower
combo. The original exhaust system with the front Y pipe and the rear
Y pipe and the old heavy not very efficient cat really choked the 75-
82 cars down. I installed the whole setup from Mid America including
mufflers and they dont sound all that great.Would recommend some other type of muffler.
and I noticed a increase in performance even with this low horsepower
combo. The original exhaust system with the front Y pipe and the rear
Y pipe and the old heavy not very efficient cat really choked the 75-
82 cars down. I installed the whole setup from Mid America including
mufflers and they dont sound all that great.Would recommend some other type of muffler.