John ,
my ported d-ports 252 @ .550 ,flowed 238 with a T2 and a RPM
my e-heads flowed 281 @ .600 , flowed 259 with a T2 and 266 with a Victor(not port matched ,stock out of the box
that was on my friends flow bench ,time was limited so no playing around ,only did one runner
the other ports must be blocked so the vac doesn't draw from the other ports only the plenum,
300 on a 325 head maybe what he is coming up with ,
my buddy uses Bill for alot of Dyno and machine work .he flows all the same heads on the his bench and comes up with same numbers that Bill does .
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