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HeadDoctor · 10-26-2006, 05:16 PM

Thats just engine building 101
The closer the piston is the head the better off you are, so long as you stay within the RPM constraints. At 5K and below you can get by with .017 clearance 5K to 7K you need .021, 7K to 7500 you need .030 beyond that with steel rods you need .039.

Ideally the piston shoud just touch the head at max RPM.

Denny@JDS INduction Products

10-26-2006, 05:16 PM	#2
HeadDoctor Registered Member Join Date: Aug 2006 Location: Hot-Lanta Posts: 48	Re: zero decking Thats just engine building 101 The closer the piston is the head the better off you are, so long as you stay within the RPM constraints. At 5K and below you can get by with .017 clearance 5K to 7K you need .021, 7K to 7500 you need .030 beyond that with steel rods you need .039. Ideally the piston shoud just touch the head at max RPM. Denny@JDS INduction Products __________________ JDS Induction Products Still The Fastest Ford Heads On The Planet