You guys think these cams are to big for this setup?
Je 85mm 12.5:1 comp
full port job on gsr head
oversized valves.5
ported skunk manifold
bbk 70mm
rc 310cc
smsp 2.0l header
I was thinking of down grading to skunk stage 2 because of the problems i've had with the motor.Also is 4 degrees advance on the exhaust cam too much too run with these pistons I noticed the valve reliefs on the exaust side isn't as much as the intake side.When I pulled my head I noticed marks on the pistons on the exaust reliefs could this be from the 4 degrees adv on the cam also i'am using 30' cometic gasket.
Thanks guys

 

cant use oversized valves even on the stage 2 cams sorry.

but with regular valves, i think theyd rip.

if you need to have someone open up the reliefs a bit.

 

I know skunk say's not to use oversized valves but I've been using them for some time now with different motor combinations.

 

Advancing the exhaust cam increases piston to valve clearance-the exhaust valves close sooner in relation to the piston's upward motion during the exhaust stroke.
And you need bigger injectors for that setup-hope you have some form of programmable engine management.

 

always follow manufacturers warnings.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hybridvteceg &raquo;</TD></TR><TR><TD CLASS="quote">always follow manufacturers warnings. </TD></TR></TABLE>

yup..its there for a reason