Max horsepower with EQ heads?
Maybe this will help, from Muscle Motors...... .257 x no. of cylinders x flow @ 28"
example-- .257 x 8 x 410 = 843 hp.
I don't know who cooked up that formula, but i have done better, and others have done better yet.
528 cube wedge, Indy 440-1 heads, single four intake, 15/1 compression, max flow of the heads was 368 at .750 lift, which was the net lift of the cam. This motor has pushed a 3065 lb car to 8.77 at 153 mph, and the 60 ft was slow by .05 on that pass. That was in about 2,000 da air to boot. So the dyno hp should be about 880? For corrected hp. From the experiances of a very well known engine builder, there is another 30 hp at least if I go to a tunnelram intake. That works out to over 900hp with an improved version of a "stock" NON RACE (what ever that means!) Head that has too little cross sectional area for the rpm it runs. The data logger shows 7450 rpm on the shifts and 7500 in the lights. Peak hp is at 6900, by the way. The car slowed .03 when i tried to drop the shift points to 7250.
I see that some don't get the idea behind this post- the point is, what could be had for power out of these EQs without major expense beyond big valves and a full port?
Sure, this combo i cooked up in my head won't make max power at 7200. That is my safety margin. I would expect peak power at maybe 6700, and with a TR intake the motor would probably like a 7,000 shift point.
When i first data logged my car, i was surprised to see the true shift rpm of 7450. I have the airshifter set at 7200, it takes another 250 to complete the shift! So things often aren't as they appear, aand we never know as much as we think we do!
Someone mentioned something about the combo doing better with less stroke? I have run the same basic heads on 475, 499, and 528 cubes, and picked up power everytime i went bigger, all with heads that are "too small". I doubt it is much different with these heads.
