L92 Casting Version Exhaust Port Size Differences
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Joined: Apr 2005
Posts: 96
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From: Monterey CA
L92 Casting Version Exhaust Port Size Differences
Why has no one brought up the issue with the major difference in exhaust port sizes between the different L92 head casting versions? There is a significant difference in the size of the exhaust ports between the L92 5364 (smooth die cast) and the 823 (rough sand cast). The 823 exhaust ports are almost 3 tenths of an inch wider in diameter than the 5364 ports. It seems that since the only weak point of these heads is the exhaust flow that the bigger ports of the 823 would be more desirable outweighing the fact that the 5364 has a smoother casting finish.
We need someone to flow bench untouched versions of both on both intake and exhaust sides.
We need someone to flow bench untouched versions of both on both intake and exhaust sides.
