Thanks to Joesoot's 'heads up' I was able to catch the show last night. I read the thread at 10:57 so I caught it just in time!!!
There were only 2 featured bigrigs, one each tandem and single rear axle. The single axle truck spun out part way up so there was not much coverage of it.
The tandem axle Kenworth was awesome to watch. The driver was pusing it to the limit and doing all sorts of all-wheel drifts, and kicking the rearend out powering up the mountain. ESPN didn't give a lot of details (never liked ESPN's coverage of some motor sports) about the truck or engine, other than it was Cat powered backed by a slick ZF transmission. It was like the transmission used on Indy racers, you ratched the shifter back to downshift, forward to upshift. That would be totally awesome to have on our trucks!
This truck made the 12. 4 mile trip in just under 14 minutes, this is a mostly gravel road full of hairpin turns. It is pretty amazing this big rig completed the run at an average of 54mph. Anyone who has driven that road knows it is not for the faint of heart. I drove up there once in 1987.
Another observation was the lack of smoke he made. Even with the driver hammering the throttle off boost he barely made any smoke whatsoever. It responded quickly and was obviously quite powerful. It must have been running propane or at least twin turbos. The race starts at about 9000 feet elevation and ends at 14,110 feet so were talking about very thin air.
Vaughn