Headers = resonance?
Title says it all. I had a Flowmaster cat-back and stock manifolds. Sounded great outside and quiet inside. Added headers and random tech cats, now it sounds incredible outside but I picked up a fair amount of resonance around 1800 rpm's. From everything that I ever read, I didn't think headers would make it resonate. Guess I was wrong. Corsa anyone?
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SSW.
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I wonder if a set of corsas would mellow them out some? Your not running a resonator correct?
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The Flowmaster has a resonator built in. When the exhaust shop welded everything up they had to shorten the cats as well as the inlet pipes to the mufflers. I know I'm grasping at straws there but, the whole thing seems strange.
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i ahd a set of flowmasters on my black car with headers and no cats . once i adjusted the hangers (those spring things that hold up the exhaust ). mine were too loose and the muffler tips so that there was a min. of 12mm below rear opening the inside of the car got alot quieter. how i found out was the passenger muffler moved and got real close to the opening which made it very loud inside the car.hope this helps
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I bought a set of Flowmaster mufflers and installed them in place of the stock '90 mufflers.
Resonated like a bad dog at highway speeds in 6th gear. :thumbsdo: The drone would drive you nuts. It also burbled and popped on deceleration (which I didn't mind). I put a complete Flowmaster setup on and the resonance and pop are pretty much gone. Next step will be x-pipe in place of the resonator later when the weather warms a little. Don't want to argue with the Smog Nazi's so no plans for headers or removing/replacing the cats in my near future. |
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