my engine l77 ( ls2 6.0 / 823 heads )

i heard ls2 with 823 ( 70cc ) 10:4cr

i want to milling 823 to got more C.R

what about milling to down 64cc

how much cr i got ?

notice : with Titan King LS3 Camshaft (232/244-112.5+3) from cammotion

 

Hello LS1 trex,

When milling LS3 heads for a stock bottom end build, piston-to-valve clearance is always a concern. While some Gen 4 engines have exhaust valve reliefs to provide additional piston-to-valve clearance for the VVT feature, they do not have an intake valve relief in the pistons.

In your case, using the Titan King LS3 camshaft, there is not much piston-to-valve clearance room for milling of the heads. In fact, I would only recommend cutting a maximum of .010" from a stock, unmodified cylinder head. Or, you can cut some valve reliefs in the pistons to afford additional clearance.

Sometimes, depending on the desired RPM range, it can be a good choice to mill the heads and run a smaller camshaft, but that would depend on the application. Feel free to email me: Steven at CamMotion.com and I can help you in the right direction for your build.

 

thank you so much

 

you will not be able to run that cam if you mill the LS3 heads to 64cc. I doubt you may be able to mill at all other than just a mild mill "cleaning" with that cam.