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Author Topic:   clearance issues
tonym
Journeyman

Posts: 13
From: Bridgeport CT
Registered: Mar 2001

posted 05-31-2001 12:40 AM     Click Here to See the Profile for tonym   Click Here to Email tonym     Edit/Delete Message   Reply w/Quote
hey all,,

got a problem, got a 90 gt and i want to put GT40 alum turbo swirl heads (Y not X heads). the heads were shaved to 59cc chambers. i have 1.7 rockers and the exhaust is an *** hair too close. can i switch to 1.6 rockers and a thicker head gasket and have enough clearance?? thanks

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jimb
Gearhead

Posts: 133
From: s. holland, il usa
Registered: Nov 99

posted 05-31-2001 01:59 PM     Click Here to See the Profile for jimb   Click Here to Email jimb     Edit/Delete Message   Reply w/Quote
I have a similar set up but with the 'X' head and 64cc chambers. I planned on going to the FMC 'B' cam and had to deepened the valve releifs. I did this with the engine in the car. I use a 90 deg. air grinder with a 2 inch dia. sanding disc to enlarge and deepened the releifs. It was a bit of work but I was able to get plenty of clearence with that cam and 1.7s. It had .510 lift.

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richard bohm
Gearhead

Posts: 195
From:
Registered: May 2001

posted 06-03-2001 01:46 AM     Click Here to See the Profile for richard bohm   Click Here to Email richard bohm     Edit/Delete Message   Reply w/Quote
how close is a **** hair too close?? if you are talking .002 or .003(you should have .100) then a thicker head gasket will do fine. otherwise you need to flycut the pistons or go to the 1.6 rocker.

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tonym
Journeyman

Posts: 13
From: Bridgeport CT
Registered: Mar 2001

posted 06-03-2001 09:48 AM     Click Here to See the Profile for tonym   Click Here to Email tonym     Edit/Delete Message   Reply w/Quote
thanks for the replies. i decided to have them flycut for the 1.7s.

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