X-15 Cummins thread

I want the classic body, I have had aero trucks.
I'm looking to make the best possible out of a bad fuel economy situation , no aerodynamics.

There is a wide range in economy with classics from 5-7 mpg depending on motors , trans, gearing.

We know the old S60 Detroit's could get 6.8-7.2 in a older Pete if driven right.

The new motors are efficient if operated , specd correctly. Traditional gearing does not work well with a modern motor..

 

Thanks everyone for the great replies so far !!

 

With a X15 ?

 

I basically have the similar situation the money they wanted for the glider was completely absurd...

 

DEF naturally rots , keep minimal levels needed to operate and if it sits more than a couple months, drain it.

 

That's awesome!!!

You can't beat Peterbilt Steve's trucks..... I guarantee you it will be way way better than a Fitzgerald !!

Nice!!

Did you do the normal 3.36 Rears?


I'm about finished with the spec on mine decided on the 500 horsepower 1850 lb torque with a 18 speed(2k lb-ft rating) 2.85 mt40 rear end , and Canadian spread for a different look....
Peak torque on the efficiency series is at 1000 RPM, truck will Cruise 1200 RPM at 68 miles per hour, similar to my XE Volvo but with slightly more power.