The numbers dont lie. Best running 318's I had were 71,74. Pre 302 head.
They would run with 350's easy, pull on the 2 bros even.
Who has a factory 302 head 318 that's a bad ***.. No body.. because they were low power. 120 hp if you look it up.
If you think that head is a power adder, so are small carburetors. I have 2 pair and one add ball, 2 are cracked. I'm playing with them off n on now. Flowed them. They are terrible to say the least. If this is just the worst port, so be it... but I've taken that port to impressive places-with a lot of work.
The 302 heads intake flow reflects the power.
Cfm
48
87
131
153 cfm.400 lift where they lived.
...175cfm peak intake flow over .500
120 hp...not 230 like the older teens.
675 heads flows more, and do it .100 earlier. It's the open chamber.
Just check the 318 porting for the average joe. #675
[email protected] & ...bigger .200/.300 lift numbers as cast .
302 head suffers from shrouding.
Dont get me wrong, it can be made good.
I know. But it's a ton of work work and still falls short in flow .100-.200 when comparing w/1.78 valve.
They all can be made to hit 199cfm by .400 and 205-215 peak, the 302 needs work most wont or cant do, or have the tools to do. You need stones to do it right.
You wont gain anything other than some compression, which is what people mostly feel.. throttle response...but it wont hp/rev like it should.
I spend more time trying to basically say... it's a good head... BUT.. only when modified. Know one ever looked at the flow numbers it seems like, just the 2.02 Hughes and Bj racing crap. It's lacking. Don't be chamber blinded!