piston to head clearance
 

on a steel rod big block chevy what is the minimum piston to head clearance?

We, JE, Reccomend min .040 between the piston and head

Wouldn't you need to know how big the bore is to give a solid answer on this? Piston rock could come into play depending on just how big of and engine he is building right?

Curtis

piston to head clearance
 

engine is 468 4.310 bore.

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

Zip.