Westech....not exactly sure how in the world I would shift when I'm pulling something like that, plus they would flag your run when the tires stopped spinning.
12V: first attempted to start in 3rd low, clutch wouldn't hold it, dropped to second, didn't want to spin, so I threw it in first and went with it. Next time I'll run hi range, first gear. That track was VERY hard, almost like fresh asphalt.
I know I needed a lot more wheel speed and I wish I would have pulled in high range, first gear. It would have put a little more load on the motor and let the boost come up some more. I was only hitting 20 lbs which is 10 lbs shy of what it'll do. I'm pretty sure with 30lbs and a crapload more wheel speed, I would have taken the trophy. Of course, it's hard to get four 40" tires to spin under a 6000lb truck....even though they were still at 40psi. Makes me feel better about deciding not to swap my 39x15 Swampers back on for the pull! With front and rear lockers, I'm almost certain I would have broke something!
Maybe I need to throw the 11Rs back on it and give it a shot.....they're nice and skinny.