[REX347]

My 331 made 485hp 6800 rpms at the crank with some serious friction problems (spun Rod bearigs) . We made a few changes after we tore it back. We zero balanced the crank and put a super victor on it. We are expecting to see 550 [email protected]~7200 once the motor is tuned and dialed in. This will be going in a car that weighs 2900 lbs w/driver. I currently have 4.10 gears in the car and will be putting the power through a C-4 with a 5500-5800 stall. Should I try a 4.30 or 4.56 gear or will the 4.10's be right? The math I am doing with all the calculators says the car should run 134 mph (sound high to me) . But if its correct this would put me around 7300 rpms going through the traps.

Whats everyone think?
Whats everyone else using?

Rex

 

[tording]

I think thats gonna be one really really really rediculously good looking err I mean fast car.

 

[GT1990EFI351]

I think you need to say how tall the tire is...first impression is that the gear is too tall, near stock 5.0's use 4.10 with auto succesfully.

 

[REX347]

Man I knew I forgot something .

They are 28x11.5 ET Streets. They are 27.2 inches tall according to summit.

Rex

 

[GT1990EFI351]

final drive x mph x 336/ tire diameter=rpm

merry christmas....final drive is ring and pinion ratio x gear ratio

 

[REX347]

Cool thanks 4.10's say 6800 rpms. But how much is a lose convertor gonna slip? My convertor is gonna be pretty lose.

Thanks

Rex

 

[GT1990EFI351]

what the hell, 7200 rpm with a 27.2 inch tire will to get 134 mph needs a 4.349 final drive