383 Wicked build up

[Mopar-Man]

Well being a 440 guy I don't know much about 383's. My buddy has his shortblock done and it has 11.5:1 forged pistons with a stock crank. he just got a killer deal on some Mopar Stage VI aluminum heads that came off of a 451 low-deck motor than ran 10.3 N/A. He is going to pair them with a very agressive solid roller cam. I told him be prepared to shift at 7,500rpm and I don't know if the crank will last. He is going to run a 5,000-5,200 stall converter. Sounds like a time bomb to me. What do you guys think?

 

[demon seed]

Well being a 440 guy I don't know much about 383's. My buddy has his shortblock done and it has 11.5:1 forged pistons with a stock crank. he just got a killer deal on some Mopar Stage VI aluminum heads that came off of a 451 low-deck motor than ran 10.3 N/A. He is going to pair them with a very agressive solid roller cam. I told him be prepared to shift at 7,500rpm and I don't know if the crank will last. He is going to run a 5,000-5,200 stall converter. Sounds like a time bomb to me. What do you guys think?

7500 on a stock crank and stock bottom end, don't stand to close. Needs an upgraded crank and rods and stud girdle at least that's what I'd do.

 

[Plik]

Crank will probably be ok,I would worry about the valve train and bearings. I've heard of people taking stock rod/crank 383 past 7k no problem. Remember your piston velocity is lower in a 383 when compared to a 440 at the same RPM due to shorter stroke.