lmatt

Could someone tell me or point me to a web site regarding what CC's of the intake runners are in stock cast GT40 heads? Also, what rockers would be the best for these heads. 1.6 or 1.7 ratio. I currently have way to big windsor jr heads with 1.94/1.60 valves and 1.72 rockers. These heads have been fully ported. From my research, they have about 200-225 cc in take runners. Way to big for a 302. Thanks.

mjr46

your windsor jr's are not way to big, with the right cam and intake , it'd be a stout little runner

Jerome99

im running the Sr. heads no loss in tq or hp motor mad 385 hp with mods in my sig ignition was whatever they were using.

minnow81469

If you want to get rid of those jr heads ill buy them from you

lmatt

Reason I asked the question about the port volume is because of an article I found on Darts web site. Here is part of it. It is a chart that list projected Hp vs port vol min-max. For a projected HP of 350-400., the intake port volume should be 140-160cc. I am making 280 at the rear wheels now. And Im almost positive that the jr's have 200cc port volume. Thats why I feel they are to big.
Just looking for some help.
302, 1.94/1.60 valves, 1.72 roller rockers, e303 cam, 65mm throttle body, 70mm MAF, 30lb injectors, adj fuel regulator, custom tune, large fuel pump-cant remember upgraded size, cold air intake tube, cobra upper and lower intake, 2 1/2 exhaust thru 2 chamber flow masters, shorty headers, 5sp, and the heads mentioned before. And all it runs is on a cold day 13.87, 101mph. Most days 14.00-14.10, 100 mph.
I just need any adivse you can give. Also run either slicks or drag radials. Usually gets best ET with drag radials. Really thinking about buying something with a small block chevy.

calfroper_06

awwwwww.....i know you didnt say that.lol sounds like you need to chunk that e cam and get a custom grind. what part of the country you in, that has a big deal on e/ts