Then how come so many 500+ ci motors can't get into the 9.70's? I have LOTS of customers that wish they were faster but run much slower than my lowly 470 and they have real heads and max wedge ports with much more volume compared to my rpm's. There has to be something said about short strokes and rpm's and one guy I did a pr. of super trick 850's with BLP NASCAR thinned blades and shafts goes 5.20's so far at 331 cubes and he shifts at 9700+ rpm's.......One thing I think helps some cars especially traction/tire limited stuff is not torque but the ability to rev the snot out of em and not have em hit the tires so hard that they spin off the line........