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What is the normal operating EGT of these trucks and what is the max sustained EGT before getting too hot and damaging the motor? I have the gauges, just need to install them.

Mine rolls at 60 at WOT fully loaded, it is just slow as molasses on a cold winter morning on hills. I really want to just be able to run 65 with a 70 sprint. Honestly, my goal is not only to get to where I am going faster but to hug the rear of another truck and let them push the wind and...

Even with fuel turned up?

The brakes on the M939's in my opinion are excellent especially with air brakes on the M322 trailer. I have locked them up before even with the abs going for a tad bit. Honestly, braking is the least of my concerns. I just need some more Go Go juice out of my pump. I am going to adjust the...

Would the 16.00's give much more speed with the Allison?

I am getting ready to install the pyro and boost gauges on my M925A2. I want to get some baseline numbers before turning it up a tad. My question is this. What is the actual top safe speed for these trucks mechanically. Yes, I know it says 63 MPH on the yellow sign. I am not wanting 128 MPH...