TT C6

I have a bone stock LS2 and I am considering adding untouched L92 heads with the L76 intake.

What compression ratio will I see with what gaskets?
What is the highest and lowest compression ratio that I will see by trying thick/thin head gaskets on untouched heads?

I plan on running a twin turbo system on the stock shortblock in the future;
so I can't mill the heads.
I can only change the compression ration by running a thin head gasket while remaining naturally aspirated and then swapping to a thick head gasket when I add the twin turbos.

Based on compression ratios,
I may just wait until I do the turbos to do the head swap as well.

Anyone have results for running untouched L92/LS7 top end on a bone stock LS2?


I did do a search before posting.
Is anyone running stock L92 stuff on a LS2 on here?

Has anyone tried running the LS7 heads and intake on a stock LS2?
I read the LS2 needs more bore to run LS7 stuff,
but I'd like to know if anyone has tried it.

I appreciate any info that you guys can provide.

macky

Look up LG Motorsport's post in here or the dyno section about their LS2 with cleaned up L92 heads. Also check out the GM High Tech Performance from two months ago. It might be online or I can look for it and let you know. They did a whole article of bone stock L92's on an LS2.

TT C6

Thanks for your reply Macky.

I think all the tests you are referring to feature aftermarket cams and "cleaned up" and possibly milled heads.

Primarily, I want to find out what compression ratios I will see with untouched L92 heads with different gaskets.

Secondly, I want to find out what untouched L92 heads will make at the wheels on a BONE stock LS2 shortblock.

Can anyone answer my questions?
Thanks in advance.

12oh

iTrader: (2)

Anyone????

lilbiotch

check this

https://ls1tech.com/forums/generation-iv-internal-engine/671143-slp-l92-cylinder-head-manifold-package.html

See5

iTrader: (53)

Stock L92s are 69.~8ccc mine were 71cc ported and 63.8 after .040 mill.
With that you can figure your CR specifically.

TT C6

Ok.
I just heard from SLP that untouched L92 heads on a 100% stock LS2 produces 10.27 to 1 compression.

The L92 head package that SLP is selling produces 10.9 to 1 compression on a stock LS2.

The question I have to face now is this:
Is the L92 head swap worth lowering the compression .63 for forced induction.
(and the additional CFM flow)

Can anyone recommend exactly which gaskets I should run on the L92/LS2 for the lowest compression for forced induction?

Any recommended work to do to the heads to lower the compression and who you recommend to do the work?

Thanks.

Richard@WCCH

iTrader: (3)

Our Stage 2 L92 CNC head increases the stock chambers to 75cc. You'll need to use the LS7 heads gaskets or any other 4.125" bore gasket to work with our machined chamber. What is your final c/r goal?

Richard