Exhaust help...

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Aug 25, 2009 | 07:33 PM

Go Vette

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Instructor

Joined: Oct 2007

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From: Penfield NY

Exhaust help...

My 75 L82 4 speed was running great but part of the exhaust fell apart due to rust last week. I got a new system with 2.5" pipes and Magnaflows. I have one side on so far and the car drives like a truck. Throttle response is not nearly as good as it was. I didn't realize that the old system was 2" - maybe I should have got that.

Anyway, what can I do to bring back performance with the freer flowing exhaust???

Thanks for any help!

Aug 25, 2009 | 07:38 PM

larryg3

Drifting

Joined: Apr 2008

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From: Antioch IL

i changed mine to 2.5 stainless and mangaflows and they are great. it is possible that the other side you have not changed has a clogged cat. once you are done it will be awesome.

Aug 25, 2009 | 08:21 PM

Go Vette

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From: Penfield NY

Thanks Larry. It already had dual exhaust without cats but hopefully you are right that it will be better once both sides are on.

Aug 25, 2009 | 10:27 PM

FRSTR90

Drifting

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From: Springfield Illinois

Have you tried retuning your engine?

Aug 26, 2009 | 07:43 AM

Go Vette

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From: Penfield NY

Not yet, although not exactly sure what would be needed.

Aug 26, 2009 | 08:17 AM

Attfay Elleybay

Burning Brakes

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From: Sebastian Florida

Doesn't a larger diameter exhaust raise the torque curve? I'm thinking by about 500 rpms.

Aug 26, 2009 | 07:05 PM

SEVNT6

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From: Omaha NE

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Quote:

Originally Posted by Go Vette

I have one side on so far and the car drives like a truck.

If you still have 2" pipe & a stock muffler on one side I bet this is the problem. I had a 2" duel system on mine before I went with the 2 1/2" Magnaflow set-up, and the Vette has never run better. I didn't have to adjust anything........

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