Join Date: Nov 1999
Location: Central California, USA
The formula is supposed to be best when using speed, less accurate for ET as it's more dependant on off the line traction.
It's interesting that using your mph of 103 and a car weight of 3400lbs weight (including driver) the calculator came up with 290hp!
They don't say, but I take it that the hp is what the engine is actually making in the car. While driving the fan, waterpump, and other accesories, breathing thru the stock exhaust manifolds, muffler, and stock ignition timing and curve.
In the times you quoted, what mods are allowed?
Open exhaust? Headers? Can they select thru a box of stock rocker arms to get the highest ratio? Is the camshaft stock or can they run a special "cheater" grind to get more power?
I'm thinking NHRA allows enough mods of that kind that any car running under those rules is not really "stock" anymore. It's really blueprinted under the rules and has many select fitted parts in it to take advantage of the rules. So you are really seeing what the cars POTENTIAL is. Not what they might have performed like off the showroom floor.
Years ago (too many) I street raced a couple of stock 302 Camaros, I had a 67 RS 327/275 with only an ignition re curve, Saginaw 4 speed and 3.08 gears. Our cars had the California smog pump on em. My 327 ran fairly close to them thru the gears. I got left a little off the line, but would hold on pretty good from there. I'd think if those 302's really had a hundred horsepower more than me I'd have gotten left in the dust really bad!
Anyway, I think the 302 has the highest hp per cube potential of almost any engine out there. So I'm not suprised NHRA factored it up.
The older I get, the faster I was!