Why 2650rpm max?

[m16ty]

You can build a multifuel to turn some crazy RPMs and HP if you throw enough money at it but at the end of the day it would be cheaper and easier just to throw a 5.9 Cummins or a DT466 IH in there and be done with it.

 

[welldigger]

You can build a multifuel to turn some crazy RPMs and HP if you throw enough money at it but at the end of the day it would be cheaper and easier just to throw a 5.9 Cummins or a DT466 IH in there and be done with it.

Exactly. Along with the added bonus of parts being available at any large truck parts store.