Piston to valve clearance.

fishmens67 said

I bet the OP has a mile of clearance with the cam dialed in.
besides you're not making any power if the valves aren't taken the carbon off the pistons. lol

Click to expand...

I’m dusting the carbon off on the exhaust side. I’m going to give myself an extra .010 clearance because I’m not 25 years old any more lol.

But yes, dusting the carbon off the piston is the most power.