Originally Posted by jrthone
But a well ported BP BB3xtra-O will flow more than 500cfm as well. Is it really worth the expense in say a 1200hp big block.Maybe up around the higer mark but surly there nothing wrong with running the BP BB3 XtraOs on a 1200hp Big Block.
I don't know who told you a bb3 will flow more then 500 cfm, but that is total BS, .
460 maybe 465 cfm max on an honest bench, . .. plus the head is too small
for a large cube engine.
Can't get the area for a 600" engine out of an oval port conventional head , ..
If you're on a budget yes it's a fine head but won't make 1200 hp.
There's a hand full of good conventional heads for a 600" engine.
Dart's big M is a 410 cc port conventional and when well ported with a big
valve will flow over 470, .. and has made great power for years.
We do a large port version of the Victor that flows over 470.
BMF has a 400 cc head that will make good power with some work.
Keep in mind peak flow isn't the only thing that makes power.
Curtis