Originally Posted by Sharif@Forged

IMOH, 430-450whp is the safe, but aggresive stock limit on the non-rev-up block, assuming people keep their revs at 6500rpm or less. We are convinced that these rods/rod bolts are tearing themselves apart at higher revs and higher power levels. We still need more time with the rev-up engines, but we have one customer running 470whp (rev-up motor) on our dyno and he's been beating the crap out of his car...still running strong. But I think its too early to declare a higher limit on the rev-up motors. Only time will tell.