M915 real world MPG and top cruising speed

[velociT]

Hey guys...

I searched but didn't really find an answer to either the real world MPG and top cruising speed of a M915.

Also wondering if anyone has run/is running bigger tires and the result?

Thanks!

 

[docfarmall]

I am running 11.00x20's 7mpg and cruse around 70 to 75 .

 

[Kalashnikov]

Is that with the Cat or the Allison?

 

[M1075]

Is that with the Cat or the Allison?

Has to be Cat. The Allision is direct so max speed should be about 60, unless you add larger tires like I did. When the FMTV wheels and tires, I can run 70 constant and sometimes up to 75.

 

[Hammer]

How much power did you loose with those larger tires?
And what kind of mileage did you end up with with them as well?
I would like to setup one of my trucks with either those tires, or the stock tires off of a M920 (should be the same diameter)

 

[docfarmall]

Cummins with 5 spd allison . No loss in power runns better with the 11.00 x 20's