We are making right around 700hp at 512 cubes with ours and we see slight cap walk....We run a girdle, and would highly recommend it at +600hp....We limit rpm and keep a close eye on everything.

We have 335 passes on our combo, and the light cap walk has shown no change from any of the freshen ups. Its been very light, and the rotating assembly still looks like new.

In my mind, rpm is the big killer..so we keep it down at 6400rpm...Granted one day it will let go, but its our race engine and if you race, its just a matter of time until something lets go..