[Jay S]

You are correct Don, I was using the 67 400 RA rating and forgot to add the 170 lbs on for the driver and min rating weights. But the 120 mph was from when I watched the car go down the track, 120 to 121 was what I watched. From those better numbers you listed I come up with 528 hp, recalculating that is likely at most a 253 cfm head using the .26 super flow number. I doubt though that the .26 is correct, likely .28 or more on a stocker, I am guessing the head flow in the 230s. Can’t really compare stock and SS to other porting that does not have to meet port volume criteria for class rules.

X3 on using mph and not et