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Old 05-16-2008, 05:41 PM
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jmimac351 jmimac351 is offline
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Join Date: Dec 2002
Location: Apopka, FL
Cobra Make, Engine: Building 289 Lemans / FFR mkIV chassis w/ Bruce Chervenak
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Quote:
Originally Posted by BLUE427 View Post
(No more poping during shifts from exhaust leakes. My Cobra sounds great now! Thank You Thank You Thank You!)


SAL,
ARE THE AIR LEAKS IN THE HEADER SEALS WHAT CAUSES THE BACKFIRING, "POPPING" SOUND WHEN DOWN SHIFTING?

I ALSO HAVE THE CARBON DEPOSITS WHERE THE HEADER COLLECTS INTO THE SIDEPIPE. SOME OF THE BOLTS WERE LOOSE BUT I THINK I WILL NEED A GASKET TO SEAL THERE TO.COULD THIS BE THE CAUSE OF THE BACKFIRING? IT DIDNT DO IT WHEN IT WAS NEW. THANKS,
BLUE427
My experience has been that if the car is backfiring then you have an exhaust leak - either at the head or collector. If you found loose bolts then I'd bet that is your problem too. I sent Remflex a 4 into 4 gasket that fit the FFR header / sidepipes and they made them up in their material. Call and speak to Rem Jr.
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