Prostar and Volvo

[Magard]

This is a Cummins forum mostly.... If you go for the d13 get the taller gears. The engines are built for lower rpm than Cummins. The main problem with d13 is injector cups. Not a big deal but it’s a cost something like $4K-$5k. Most of them get a lot of miles (million plus) and never have the head off. Cummins in its stock form can not make this claim especially when geared taller than 3.55.
Cummins is the only viable platform for a demandate. If you are gonna run the demandate then either one. They both have similar sensors and all to deal with. Volvo might run a little cleaner and has better liner design and no high pressure pump to grenade. But there is a wealth of knowledge here to help keep it going. Look over on Facebook at the “Volvo Truck Masters” group. There is some solid guys on there also but not as deep into the computer and tuning as the knowledge here. Software to tune Volvo is none existent as far as I can tell.