LPE LS1 heads millied .055
09-15-2007, 10:40 PM
#1
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LPE LS1 heads milled .055 Looking at a set of Lingenfelter heads that are milled .055. Was wondering what kind of issues I could have with these. I wanted more compression, something around 11:1 so I can run 93 octane. Also any fitment issues with the manifold with it being milled, and could I counter that with a little thicker gaskets. And anything else that might come up.
The cam that it will be matched to wold be the LPE GT2-3 with the only other mod being a lpe intake that is on my car now.
Thanks,
Mike
The cam that it will be matched to wold be the LPE GT2-3 with the only other mod being a lpe intake that is on my car now.
Thanks,
Mike
Last edited by RMH_GTO04; 09-15-2007 at 11:04 PM.
09-20-2007, 03:43 PM
#3
There was an old post a few years back where someone, a shop I think, said that the mid .050's is where they started having manifold fitment problems. That includes thinner gaskets as well as milled heads and/or block.
It's a long story, but my 5.3l heads were milled .040, I switched to Cometic .040 gaskets (another .014 off OEM), and I also had to deck the block .020 (wrong piston/rod combo). So that's .074. I had to use new gaskets and remove the manifold guide holes which sit in the heads to make my intake seal.
I shimmed the rockers .020 to try to get a good wipe pattern and ended up using 7.4 pushrods.
It's a long story, but my 5.3l heads were milled .040, I switched to Cometic .040 gaskets (another .014 off OEM), and I also had to deck the block .020 (wrong piston/rod combo). So that's .074. I had to use new gaskets and remove the manifold guide holes which sit in the heads to make my intake seal.
I shimmed the rockers .020 to try to get a good wipe pattern and ended up using 7.4 pushrods.
