.030" quench: too tight?

[rumblebox]

I'm trying to get as much compression and as little ping as possible out of my 473 with flat tops and 781 heads. Instead of having the machine shop zero the deck, i want to go down another .010 so i can have a .030 quench without having to pay extra for thinner gaskets.

It will make about 560hp/540tq and spin about 5500-6000.

I ran a .036 quench on my 6.0 with LS3 heads spinning 7k with no issues, but I'm still learning about big blocks.

 

[MikeB]

From what I've read, .035" is the absolute safe minimum, except for aluminum rods which need lots more. I know you have a big block, but I usually shoot for .040"-.050" in a small block. John Lingenfelter said a .038" gasket with the piston down the hole .005" (.043" total) is perfect for a small block.

 

[68post]

A bigger bore piston will have more rock in it's bore. .030 is way too tight !