Mack MP505C

Nope 505 iirc is the max the MP8 was able to go upto. If your lacking on power you can see if the torque can be turned to 1860 if its set at say 1650. Or grab a regear. Otherwise there MAY be aftermarket upgrades but pushing a little 13 liter past the max rateing is likely to do bad things to its longevity.

 

Wouldn't do it. Same exact motor as the volvo D13. People that have em deleted and turned up find out the hard way they don't last. Some crappy tune will be put in and egr disabled and they don't compensate for the extra fresh air being introduced. It will run hot and next thing you know you have a fresh hole in a piston.

 

It's already at 1860. Leave well enough alone. If you need 2050 go with a 15 or 16L

 

They say 550hp can be done but it won't be a dealer tune.