specRX7_22

at last weekends race, my dad and i noticed a sound which sounded like a small exhaust leak. with the help of our buddy Bret DePedro, we pulled the manifold off and sure enough, there was an obvious leak at the manifold judging by the gasket. so we set a new gasket in place and had an extremely hard time fitting the manifold back onto those studs. and then my dad started the car and we still heard it. my question..... has anyone ever heard of the stock manifolds warping? i wasnt sure if these big cast iron things warped easily.

hornbm

i suppose if when the cat is clogged the manifolds glow orange, then i'm sure they can warp. Never heard of it before though.

I'd just get a new manifold from a junkyard, or get a header.

specRX7_22

no cats... straight-pipe after the manifold. we have a friend who is parting out an automatic FB and can get one.

j9fd3s

iTrader: (3)

ive never seen one either, if you can get an 84-85 one its a little better

mike

hornbm

I didnt mean that... i meant that if under cirtian conditions our exaust manifolds can glow orange, then I'm sure there's cases where they'll warp.

Fennix_sr

did you sand and file the ports and the area the gasket is on and same with the mani.? if you havent thats probly why you have a leak.

specRX7_22

we went over it with a razor blade to get excess gasket off.

Fennix_sr

if the sound is commin from the area around the mani then take it of again and sand it smooth, just dont miss any spots. sand both the man and the area around the ports.

Amagi82

header time!!! Throw that godaweful heavy and poor flowing piece of crap into the nearest trash can

specRX7_22

i wish i could raptor.... but the rules say "exhaust is free AFTER the manifold" meaning it has to stay o well

RacerX7fb

Hey at least SPEC RX-7s dont have to run with cats on anymore ...those are the real power robbers on the stock car.

specRX7_22

actually manifold is the big power robber, but cats were just another complictation also.... now were up at 98,99 decibals and wow are they loud.