Thoughts on Straub/Yates headgaskets?
TECH Fanatic
Joined: Feb 2015
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Not aware of any issues with gasket bore size on iron block. I wouldn't use them on an alum block since fire ring on edge of sleeve and block. Theory/thought - The larger bore fire ring is closer to head bolt circle providing more stable clamping force and cylinder seal under higher boost (>20 - 25psi). No data to prove theory.
Thread Starter
Joined: May 2012
Posts: 1,796
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From: Elm Creek, NE
i know on the Facebook post people voiced this concern and they said it wasn’t a problem, it is a big concern of mine.
ive been running ls9 gaskets on a 3.908 bore l33 block for a couple years now at 700whp with no issue. We have a couple blown big blocks running 50-54# of boost, and we were having headgasket issues running a bigger dia headgasket. No other changes other than Shrinking the dia of the head gasket bore and that problem went away, so I try and run as close to correct center as I can. Obviously the ls9 work, for people making a lot more power than me. The idea of more meat around each cylinder is appealing to me, but your theory is interesting also.
Not aware of any issues with gasket bore size on iron block. I wouldn't use them on an alum block since fire ring on edge of sleeve and block. Theory/thought - The larger bore fire ring is closer to head bolt circle providing more stable clamping force and cylinder seal under higher boost (>20 - 25psi). No data to prove theory.
