cam question
i run ported and matched 302s with 1.60 exhaust valves on my 360, it keeps pulling til i back off at 6000, with the 284/484 in a 318 with these heads it would wind up to 7000 no problem. with present cam ,489 lift from bullet racing and previous MP cam i ran comp 901s as per engine shop recommendation.these heads will flow with good velocity, never mind the number crunchers, try things out for yourself and see what happens
7k?
901 springs, 484 cam & 318 heads..
In neutral? floating'em. Lol
There are too many people that hung up on the 302 head... it's just a closed chamber 318 head.. it flows 170's cfm intake and 120's exhaust. All as cast 318 heads are great for stock cams up to 340 spec, after that they need work or your power return from a bigger cam will be drastically reduced.
Random food for thought...
Did you know a #675 318 head is around 68 cc?
Did you know that a #302 is 64cc?
If you were to mill down a 360 head to 68cc...it would be the same as a 675 open chambered 318 head....and flow 25cfm or so better.
If you milled a 360 to 56-57cc... it would be closed now like a 302, and flow 25+ cfm more.
The 302 head is just about 4 cc smaller than a 675 open chamber head from the factory. I have them both off low mileage bone stock motors, wire wheeled the carbon off and cc'd them. No sunk valves.
The bolt on power increase is tiny till you incorporate a tight quench with the right piston, then it goes from tiny to small..add a cam and port them and maybe you will then see....it is about air flow! Ultimately the power is gained by getting more in and out.
Given a choice, unless it's a mild stock rebuild, if it is going to make power over 5000 rpm... I will never use a 318 head, period.
273 cid is the only exception.
