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what head gaskets are you all using for your forged builds?


loner

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they compress down to around 1.37mm

As quoted from Rosssub, knew I'd seen it somewhere

 Rosssub said:
Got the new head gaskets today, cameras playing up but they are OEM p/n 11044AA463. They are version 1/4 STI MLS gaskets.

I've read plenty of threads claiming these HG to be 1.6mm thick (1.58mm compressed), which would of set my compression ration at 7.842:1, a bit lower than I want. But read a few threads stating them to be 1.37mm compressed which would set me at 7.979:1. Took the gamble and they are spot on 1.385mm thick, so will be 1.37mm crushed. So:

92.25mm bore

75mm stroke

48.8cc combustion chamber (version 6 STI heads/machined)

17cc piston dish

-0.5mm clearance to deck/CTD (piston head above block 0.5mm at TDC)

93.3mm HG bore diameter

1.37mm HG thickness crushed

CR - 7.979:1, with a 0.87mm quench.

Perfection. :)

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