Jon, how well whould our A heads work on a 604? At what point should we look at a different head?
with CNC'd A460 head )
You should give Charlie Evans a call, he's going to do my EX514's.Kaase lists his C's with a 2.450" intake at 500cfm @ .800 he doesn't list a flow # for his A's.
There was a thread on this site awhile back about a guy who does a killer A head, I should have book marked it.
hummmmmmmm ??????
I was just kind of thinking out loud, a friend called me two weeks ago about some info. He's building an engine for a guy thought he wanted to do a 565. I think I talked him into a 582" with a 6.800" rod. The engine is only going to rev to 7,000 so I told him " I think you have a tweener" I think that engine could use the best A-460 head he can get and it will do best over-all or a 475 cfm maybe 500 cfm C-460 head. Off the top of my head I'd guess a 500 cfm C-460 will have better numbers from 6,000-7,000, but the A-460's would have a better average from 4,500 - 7,000 ( But I might be full of crap too ) The extra airflow on an engine like that might be like putting a T/R on a 502" that rev's to 6,200 and the T/R with two dommies made better numbers everywhere over a single with an 850 carb with a max of 80 hp gain at 6,200.
It's would be fun to have the money to find out.
Rm your comment about "combination" reminds me of the day I dyno'ed the 565. The guy who owned the dyno shop got a funny look on his face after our first power pull to 6,000 and he saw the numbers. He had more of a grin on his face than a smile I said to him " what are you thinking?" He pointed at a picture of a drag car on his wall and said " The two brothers who own that car think they have the baddest BBF in town. It's a 572", has a bigger cam than yours, more compression and a tunnel ram with two 1,150's. When we're done with your engine I know yours is going to out do theirs" He was right.
High air flow is only a portion of the equation to making hp. You can't forget about velocity and chamber efficiency.
I actually have two friends that are starting BBF projects one guy is building his own for a sand car and the other is building one for a customer. I think they'll both be 582's.
G-
Jon
thanks, but I have a pretty sharp guy who is 16 minutes from my office.You should give Charlie Evans a call, he's going to do my EX514's.