rich

went to the track friday night the second pass of the night the first on both stages of n2o 175 hp total and it started ticking real loud now it ticks when reved a little off idle till 2000 rpms then it quits checked push rods all ok thinking possible cracked piston? any other ideas are more than welcome. I have everything needed to run that much hp fuel pressure didn't drop too low no kr until it started ticking.

Slowhawk

iTrader: (12)

Could be a piston.You'll have to do a leekdown test.
I had a problem after about 15 bottles of N2O.Loud ticking ended up being a collapsed lifter.