farmo83

How many RPM's is the 500hp rotating assembly take reliably? I'm ordering a kit that calls for turning up to 5800 but I don't want to be going through the bottom end a season or two.

Black Baja

iTrader: (2)

I think you will be fine. Unless you hold it at 5800 rpm for miles and miles. I will say this I don't think the stock oil system will be up to the task as far as cooling goes.

MILD THUNDER

iTrader: (3)

You should be fine. Guys use to spin the chit out of those stock Chevy cranks and 7/16 rods for many years.

14 apache

iTrader: (1)

If the crank and bearings are good and the oil don't get to hot you will be fine.

Rattlesnake Jake

iTrader: (2)

I had a built 500EFi (575hp) Stock crank & Rods in a 271 fastech. Ran 17 miles @ 5400 no problems.
A guy named Saris put it together & dynoed it.