How much compression on 93
Thread Starter
Instructor
Joined: Jan 2015
Posts: 140
Likes: 9
How much compression on 93
How much compression can these. Ars get away with on 93 pump
car currently has ls7 heads milled .020 with a 68cc chamber factory head gaskets I’m thinking g around 11.3-11.5:1 compression ?!?!?
running 700 lift springs and a HPC hulk cam which they won’t give the specs just 680ish intake and 660ish exhaust.
could I mill the heads down a little more or would piston to valve clearance really come into play?
I’m bored and curious
car currently has ls7 heads milled .020 with a 68cc chamber factory head gaskets I’m thinking g around 11.3-11.5:1 compression ?!?!?
running 700 lift springs and a HPC hulk cam which they won’t give the specs just 680ish intake and 660ish exhaust.
could I mill the heads down a little more or would piston to valve clearance really come into play?
I’m bored and curious
Burning Brakes
Joined: Sep 2018
Posts: 1,023
Likes: 174
From: Auburn Al
11.5-1 LS2 no issues, use a CR calculator if you have those heads on an ls3 I don't think your as high as you think, and if it is a LS7 you should have taken 10 thou off the head gaskets, My LS2 I milled 25 and used .044 HG
