Do you guys think that a scat 9000 series can handle 600hp....around 450hp on motor and a 150sht....it in a 383 stroker....iam not going to be spraying it all the time...its a weekend car....

 

We build a lot of engines at our shop and so far we don't use any cast cranks in the engines we build but we do a lot of balancing for some other shops that have used them and when we have to drill a cast crank compared to a 4340 it's night and day differance between the 2.

And we have seen some cast cranks that have been run and taken out for rebuilds and with the soft journals they don't seem to stand up to a 4340 cranks that are nitrided.

 

It might live. My last Eagle cast crank lived okay for 3 seasons of racing and about 5,000 street miles. It's in how hard you beat on it, and how well the motor is built. Limits are put on things for a reason, but it's not uncommon to see people do things with parts that shouldn't hold up to it.

I guess the question to you is:

Would you feel safe/at ease spraying 600 hp through a part only designed for 100 hp less, when you can upgrade for only a few hundred bucks more?

Derek

 

The Scat 9000 series crankshaft is rated to 650 HP @ 6500 rpm. They are just about as strong as your older GM forged crankshafts. I wouldn't be worried about the crankshaft, I would be more worried about what connecting rods you are going to use.
I have seen alot of these crankshafts run without problems. I sell most of these style cranks to the local circle track guy's for their IMCA modifieds. So far I have not seen any of them break.