Zero deck pistons? Quench distance

hi there. Just curious what quench distance people are using for race 455s with alum heads?

It seems 28-35 thou should be an optimal distance between the pistons and head from what I have researched.

What have you guys experienced?

 

I've ran .039, just put an engine together with .038. has steel rods.

 

Thanks, I’m at 40 thou in my engine, also steel rods.

 

Mine is not at 0 deck, but .010, I have .050 in mine......
Is it optima . I'm sure not, but I wanted to stay around 12: . Didnt want to be forced to but 12 or 15 dollar a gallon gas that being closer to 14:1 would require

 

Just as important is that the top ring is no more then .185" below the top of the pistion so to have the least amount of crevice volume.
This distance assumes NOS will not be run.

 

Thanks for the info. Mine is a turbo engine. Zero deck pistons with custom dish and valve reliefs. 9.3:1 static compression and 40 thou quench zone.