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<gregsdart wrote:>
Jim, why not really test them? 572, 15/1, 283/290 roller with .775 to .825 lift, Terminator on alky. The heads would definately be the choke point !

<fast68plymouth wrote:>

the MW Victors are really pretty efficient for their size, and on a 500-ish cube motor might even be better than a -1 because of the higher velocity.
but on a high effort large cube combo, i think the added area of the -1 would start to pay off.

I am OK with testing any size from 493-572, but IMO 572 is getting too big for either head. The idea of alky injection would eliminate the "carb" restriction from the variables. And the builder can call the cam, as long as it is big enough (280-290 range), and roughly 0.730-0.790" lift.

My initial point was you don't see too many dyno head swaps. Especially if the heads max flow numbers are the same. This would show the "hidden" differences in the heads such as port size/efficiency, chamber shape effectiveness, etc.