piston to valve clearance?

[Suicidal Racing]

i'm doing a stock lq4 short block with some L92 heads that i'm going to port my self..

i would like to get comp up to like 10.5-1 or 11-1 on the engine vs i just bolt the heads on and run a .006 smaller gasket i will be only 9.77-1

so for me to get that i would have to run a .006 smaller gasket and the chambers would have to be 62cc or 58cc.

the cam i'm doing is 246/253 630/630 with either a 110 or 112 lobe

would i smack a valve into my pistons with this setup..the L92s are a 15 degree head also right..if i roll the head to 12 degrees i know it would help me out some.

[NOS-Nelson]

i'm doing a stock lq4 short block with some L92 heads that i'm going to port my self..

i would like to get comp up to like 10.5-1 or 11-1 on the engine vs i just bolt the heads on and run a .006 smaller gasket i will be only 9.77-1

so for me to get that i would have to run a .006 smaller gasket and the chambers would have to be 62cc or 58cc.

the cam i'm doing is 246/253 630/630 with either a 110 or 112 lobe

would i smack a valve into my pistons with this setup..the L92s are a 15 degree head also right..if i roll the head to 12 degrees i know it would help me out some.

You should mock it up and check. Plus angle milling the heads is going to reduce your P/V clearance unless the VR's are cut for 12 degrees.

[Collinsautomotive]

the deck on the head is far to thin to do anything of the sort.

i'm doing a stock lq4 short block with some L92 heads that i'm going to port my self..

i would like to get comp up to like 10.5-1 or 11-1 on the engine vs i just bolt the heads on and run a .006 smaller gasket i will be only 9.77-1

so for me to get that i would have to run a .006 smaller gasket and the chambers would have to be 62cc or 58cc.

the cam i'm doing is 246/253 630/630 with either a 110 or 112 lobe

would i smack a valve into my pistons with this setup..the L92s are a 15 degree head also right..if i roll the head to 12 degrees i know it would help me out some.

[Suicidal Racing]

alright so no rolling the heads then

and from what i understand i will smack the piston with the 10.5-1 or 11-1 comp so i guess i'm stuck with 9.77-1 comp then with that cam.

collin that is the cam i'm going to have ground for my setup that i posted in the other thread.


if i had the parts here i would mock them up nelson but i dont have any parts yet..hopefuly in the next week or 2 i will get the short block and bare heads.

[NOS-Nelson]

alright so no rolling the heads then

and from what i understand i will smack the piston with the 10.5-1 or 11-1 comp so i guess i'm stuck with 9.77-1 comp then with that cam.

collin that is the cam i'm going to have ground for my setup that i posted in the other thread.


if i had the parts here i would mock them up nelson but i dont have any parts yet..hopefuly in the next week or 2 i will get the short block and bare heads.

Eagle stroker kit with a flat top will be 11.5:1 or so. I sell them all day long.:cool:

[Suicidal Racing]

lol the stock lq4 short blocks can take 800hp..u just got to change tod bolts..my buddys ls1 made 700rwhp on juice and it ran like that for 2 years and that was with a 200 shot.just got to put a safe tune in them

i am plaining on rebuilding the short block,rod bolts and a better set of rings to handle the 200 shot i'm going to throw at it..once it blows i will then get diff rods and pistons and go to a 88mm turbo.