[andyl]

Great find 750hp, very interesting indeed.

The figure that wasn't there but easy to calculate is the peak torque per ci. Torque vs HP is often discussed and which is more relevant in each situation. Dividing the this case yields 1.461 ft-lb/ci for the F1 and 1.454ft-lb/ci for the Cup car. I cant say I say I possess any deep or profound understanding of what that implies beyond something woolly like "implies they probably both have similar VE" but I find it curiously close none the less in 2 very different engines. I thought it might be an interesting measure to apply to your own engines as a potential level playfield comparison that would indicate some level of efficiency that could cross compare say a 289 and an LS7 for efficiency and still be talking apples and apples for relative performance. In my case its 0.931 for the stock 350 chev and 1.152 for the 347 both a long way behind the F1 & Cup figures as would be expected -Andy