LT 1 350 valve to piston clearance

[Paul Precht]

The piston is chasing the exhaust as it's closing, if it's a little tardy it gets smacked. The intake is chasing the piston as it's heading down, if the valvetrain is tight you can run .010" on the intake and it'll never hit.

[randy wilson]

Originally Posted by Paul Precht

The piston is chasing the exhaust as it's closing, if it's a little tardy it gets smacked. The intake is chasing the piston as it's heading down, if the valvetrain is tight you can run .010" on the intake and it'll never hit.

I agree with this. I've ran em so tight that at zero lash on the intake, the motor would not turn over by hand. Set the valves, and turn 10,000 with no problems. The exhaust, high 70's is as close as I've ever dared. And you'd better have good springs.