95fbformula

This might be a dumb question but is this the same thing as when people say they have a zero decked block. also what would it be at zero .000 or something like .005 i guess i should know since i had my machine shop deck my block but never thought to ask when i was there. Also i forgot i have 643 casting heads how much milling is evolved in making them 52cc chambers

Joe B

"Piston to block deck height"(like in your thread title) can be "anything" depending on how it is set.........When someone says they have a zero decked block , that means that their piston height is level with their blocks deck surface(IE:with the piston all the way up in the bore)..........and ZERO means ZERO...not anything different.......and if it's -.005, then the piston is -.005 down in the hole(not quite level with the deck).........you can also have a "Piston to deck height" with a positive equasion....for example: On my last engine, we had the block decked down to where the pistons were sticking out of the block 5 thousanths(this is pretty commonly done)............and if I remember correctly (someone please correct me if im mistaken) the LT1 heads milling specs(for a regular flat cut).... around 6-8 thousanths of a cut yields a chamber reduction of about 1 cc...............Joe

The Engineer

If you're actually at "0" deck height, at a minium you should use a .039 head gasket to ensure correct piston clearance with the head.

If you're at a + value (piston above the block, i.e. .005), you'll need an even thicker head gasket.

WD

95fbformula

Thx for the info that cleared up some confusion i had