piston to head clearance
#3
Originally Posted by ARUSSELL
We, JE, Reccomend min .040 between the piston and head
Curtis
#5
Senior Member
RACING JUNKIE
Join Date: Jan 2006
Location: La.
Posts: 2,890
I think doorracer is right if you run a good forged piston you need atleast .005/.006 clearance and you have to consider the rock of the piston. JE's recommendation of .040 is a safe one with "0" deck ht., the last 468" i put together i used .039 Felpro gaskets and it has 2618 flattop forged pistons with .0065 clearance. I put that much clearance in the motor because the owner wanted to be able to spray a 250 shot of nitrous. It's a pump gas motor and runs 6.80's 1/8 mi. no spray in a 3700lb street car.
JMO
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