increasing the ZL402 CR
Thread Starter
Teching In
Joined: Jun 2006
Posts: 11
Likes: 0
increasing the ZL402 CR hi guys...
Could some one please tell me the best simple way to increase the CR in my Engine to get 10.5
the engine is
LS1 Low Compression Features -
Built entirely from brand-new parts.
Sold outright, no cores required!
GM LQ9 iron 6.0 liter block (includes block plugs)
4.000" Eagle 4340 forged steel crankshaft, balanced to rotating assembly
4.000" Ross 2618 forged alloy pistons with -28.50cc dish (includes new rings and full-float pins)
402-CID displacement
Eagle 6.125" H-beam rods
Includes new, factory-installed cam bearings; Clevite rod and main bearings
9:1 compression ratio (nominal; ultimate compression ratio will depend upon heads and gaskets used)
Could some one please tell me the best simple way to increase the CR in my Engine to get 10.5
the engine is
LS1 Low Compression Features -
Built entirely from brand-new parts.
Sold outright, no cores required!
GM LQ9 iron 6.0 liter block (includes block plugs)
4.000" Eagle 4340 forged steel crankshaft, balanced to rotating assembly
4.000" Ross 2618 forged alloy pistons with -28.50cc dish (includes new rings and full-float pins)
402-CID displacement
Eagle 6.125" H-beam rods
Includes new, factory-installed cam bearings; Clevite rod and main bearings
9:1 compression ratio (nominal; ultimate compression ratio will depend upon heads and gaskets used)
On The Tree
Joined: Jun 2007
Posts: 181
Likes: 0
From: 29 Palms, CA&Lebanon, IN
what heads are you using? is there a specific reason you want 10.5:1? i would contact one of the vendors and tell them what you have so they can match you heads and pistons accordingly
