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Re: Better friction - flat or gapped surfaces?
Posted to Technical Theory Forum on 12/20/2021 5 Replies

Agreed. When I took the Ford class (oh way back when) on the 4.6L, when it first arrived, the Relative mean smoothness was allegedly 8!

Ford stated early on, that most machine shops could not get the surface that smooth. If such was the case, the head needed... Login to read more.

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