Cat HP Question

most c15 are 475,they can be boosted to 550 butyou have to have the tranny and rears for it or no legit shop will turn it up.i believe you have to have a 18 or 15 speed tanny minimum

 

13 or 18, the 15 doesn't rate high enough.

 

You should be fine turning a c15 to 500hp. but one thing you need to check out is if the rear ends and transmission are rated to go that high. You need to get the serial numbers off both the transmission and rears then call a cat dealer and tell them what you want done. They will tell you if their rated to go that high.

 

I would think nothing about what the trans and rears are rated for. They will take it if you dont pound on it every time you pull out from a light. You have a brain its connected to your foot use it(your brain).
Dont believe all the stories about poor mileage either. I have a 550 cat turned up to 725 and have done nothing to the trans and if I were running otr I would think that 7+ would very easy to attain. I get 6.5 running local and hauling heavy with a heavy foot.

 

A/T, i have a 387 w/ a cat c-15 with a modified ecm, i get 6.7 mpg at present time. dont know if consider that good, but they are capable of it and more if driven right imo. dont be so hard on Detroit's they also can be tuned/finessed for mileage and power as well.

 

There are lots of companies that dont have age limits on the trucks. Matter of fact most of them are better places to be. Dont over look the small places. You can make very good money if you find a small mom and pop place the has a few good customers.

 

I have a c15 435, and was told they can be uprated to 475 safely