Originally Posted by
hotshot boy
Hey guys, looks like a few of the ARCR crew including myself will be coming up for this event (heard its worth the trip.. ;-) but I was just wondering what the difference is between 2WD 540/21.5 class and 2WD stock is..?? I thought they were much the same thing...???
Stock is for 17,5T motors, no boost timing, open gearing.
540 / 21.5 is the entry level class, for 540 (silvercan brushed motors), or 21.5T brushless motors. The 21.5T motors are limited to 6.0:1 gearing and must be from the list published by VORTEC.
Ray