I have a all forged 383 (heads and cam) The cam specs are 240/240 595/595 112. I know this cam is supposed to be reved kinda high in order to make some good power. What is a safe limit to be reeving the car to? The car right now has never seen anymore than 6k. I am just trying to prevent a spun bearing. Thanks guys!

 

Since you have a forged rotating assembly 6500 would be safe as long as the springs are in good shape. I have a cast steel crank and I rev to 6500 pretty regularly.(hyp pistons as well)

 

springs are rated to .625 lift so i guess they are ok..

 

Your spring PRESSURE not max lift.With a forged bottom end,set up right you can turn 9000RPM's if you want.(Computer won't let you go that high-7000 limit)

 

Your bottom end doesnt mean much. It's all about your bearings, and the BALANCE job. With 4 bolt mains and a good balance, you should be able to turn 7,000+ without issue. I turn my balanced stock bottomed end to 6800 (2-bolt)

 

its all balanced and blueprinted, built by a Chevrolet Dealership. Not that I chose to get it built there, just that when I bought it from a friend he had gotten it built there. Not because they are better in any means, but because he knew someone that worked there. The thing I am scared about is that it is only a 2 bolt main.

 

2bolt will be fine up to 600+FWHP if you are not running a butt load of NO or 25PSI blower,and if it is set up right.