Cummins Big Cam upgrades

hello did u find out how much for the aux section for the convert 9-13 speed

 

i have a 9speed rto and want to put it into 13 speed rtoo

 

i have a 9speed rto and want to put it into 13 speed making it rtoo

 

i need the .62 last gear to go with my 5.38 rears at 1700rpm 65mph

 

im using a 425b 2150 rpm 1989 with 160000 miles

 

im sure lowering the diffs is better but more expensive

 

this way 9-13 rtoo will give me the same ratio and have 4 extra gear split in high

 

I drove a 444XT that the Boss rebuilt for me with Pittsburg power Parts. I can tell you this we Snapped a 720 HP Dyno like it was a Twig when I still had Fuel and Turbo Pressure LEFT TO FEED THE INJECTORS. That engine was a BEast yet would get decent Fuel economy as long as you kept your foot out of it around 6 MPG on the highway. It had a RTLOO with a .5 final drive do not ask me how it had that gertar in it I do not know boss with 3.55 rears and 24.5 Tall Rubber. Truck was an 88 International 9300 that loved to fly. I had to cruise in 11th gear across Ohio to avoid lugging the motor. Max Fuel Pressure on that motor was over 450LBS flow well she had enough to drain a 30 gallon container as a test in less than 5 mins. Injectors IIRC were 3 sizes larger than stock. Yet the Turbo never got above 900 could have been the fact I never had to really push it also.

Truck is still out there local farmer owns it hauls his grain with it and loves the fact he can haul more faster than anyone else. While they are trying to get their trucks wound up he is already at the elevator and then coming back.

 

How many HP can you get out of a Big Cam Cummins?

 

Mine was rebuilt to be at least 850 and I think she had it. When you break a 720 HP Chassis Dyno like it is a Twig and your not Maxed out in Rail or Boost you know you got a beast on your hands. The guy who had the Dyno was like I have NEVER seen a truck break this thing with pressure to spare.

Funny Story about that truck after it was Rebuilt Shop Foreman who liked to Hotrod things in and out of the Shop well he tried doing that with this one. I needed a new Driveshaft after he was done.