Important if you run D-H/S or SA

[James L Miller]

Originally Posted by Mark Yacavone

Kinda wondering about the LD4B manifold now on the 273 4bbls. Same basic manifold as the one in question here.
No gain on that one either?

I can't comment on ET, but my preliminary flow testing resulted in a loss of several CFM with the LD4B on over the bare head. The ports in the manifold were wider and taller than the ports in my 920 casting head. I suppose there are methods to fix that. I just bought some 302 castings from Terry Dye so maybe they have bigger ports that fit better? They are still in plastic bags from my trip to Detroit.