[Stan Weiss]

Originally Posted by ponyakr

"... on a stock 670 head I got it to flow 225 to 228 cfm..."

So, you think Randi Lyn's '67 Stocker can run 10.50 or quicker, with no more flow than that ?

OR, do you think the heads have been "massaged" to flow more ? IF so, how much more ?

I understand about Stocker "tricks" & "set-up" to run quick. BUT, the engine still has to make a certain amount of power to run the big numbers.

SO, since this thread is about 670 head flow, there's no better place to include the 670 heads on an NHRA Stocker.

Aprox how much would heads have to flow in order for a 400 Pontiac engine to turn 8000 rpm ? Is that something you guys can calculate ?

Bryan Phillips also has a 10 sec '67 Bird Stocker. So, I assume his 670 heads also flow more than a non-ported factory stock set.

There is no set answer. The more the heads flow the less cam that is needed. The less the heads flow the more cam that is needed.

I will set the over under on HP @ 530 and take the under to run 10.50 with a DA of zero.

Stan