ZZ42Fast

iTrader: (2)

Just replaced all my gaskets, (header and collector pipe) and my gerabox mount to pollyutherane (sp?) and now the exhaust is hitting my passenger side subframe.. I have had to smash my pipe just as it starts going under the passenger side so it clears, but why would it have changed now?

Thanks

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'86 Iroc ZZ4
Best Run 13.8 @ 100mph
I told you to blow the bloody doors off!
The British Firebird/Camaro Site

Jza

Try loosening all the bolts in the exhaust again, and setting a wood block between the pipe and the SFC, then tightening the bolts again. What kind of headers do you have, out of curiosity?

ZZ42Fast

iTrader: (2)

They are Shorty I think they are Hedmann? Will try and do that thanks!



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'86 Iroc ZZ4
Best Run 13.8 @ 100mph
I told you to blow the bloody doors off!
The British Firebird/Camaro Site

calroc

It's the poly trans mount. It raised the engine/trans, thus raising your exhaust closer to your sfc.

Jza

btw, don't forget to remove the block after tightening! you don't want a fire.

ZZ42Fast

iTrader: (2)

Damn poly mount, I did wonder. Thing is the intermediate pipe has already been squashed slightly for clearance if I do any more, I'll probably loose some power. Is ut worth trimming the subframe connector on that side?

Thanks

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'86 Iroc ZZ4
Best Run 13.8 @ 100mph
I told you to blow the bloody doors off!
The British Firebird/Camaro Site

calroc

Trimming the subframe connector may weaken what you have spent money to strengthen. You could replace the poly mount with a new stock one, unless they are repeatedly failing on you.
PS. Don't leave your exhaust pipe dented.

ZZ42Fast

iTrader: (2)

I really need to keep the poly one, I have a bit of a problem with stock ones So the sfc's stay as they are. The only thing that can change is the exhaust. What's wrong with a dented exhaust? Frustrating problem this.

calroc

Depending on how badly it is dented, it can restrict flow.