Another Cometic 0.40 question...
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12 Second Club
Joined: Jun 2005
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From: Kansas City, MO
Another Cometic 0.40 question... My car is tuned with GM graphite head gaskets installed, but I pulled the heads to find that they were blown, so my question is if I switch to cometic .40 gasket, will I NEED to get the car retuned and how much power should I pick up? Car has Torquer2 cam, prc ported ls6 heads, fast 90, numbers in sig.
with that cam, youll want to make sure your PtoV clearance is ok running a .040 HG. whats the chamber volume on those heads? im assuming you have a stock bottom end, so you dont have valve reliefs. if its going to be tight, then you might want to look into a .045-.053 MLS gasket. but you have to do your calculations and check PtoV to be 100% sure of everything.
and you will make alil more power if your up'ing your compression. what youll really see/feel is a boost in low end torque. I dont know the compressed thickness of a graphite gasket, but say its .053 and you go to a .040 then yes, i would look into getting the tune looked at to optimized your setup.
and you will make alil more power if your up'ing your compression. what youll really see/feel is a boost in low end torque. I dont know the compressed thickness of a graphite gasket, but say its .053 and you go to a .040 then yes, i would look into getting the tune looked at to optimized your setup.
Last edited by ProjecT 9; Feb 22, 2007 at 08:07 AM.
