136" track and skid

[v-max600]

i was thinking of putting a 136" track and skid on my vmax 4. how much top speed would it take off? i'd still like to be able to kill all the ac guys around here in drags, would a 121" be better than a 136" for drag racing? any help would be greatly appreciated.
thanks
steve

[Master of Faster]

My experience says you'll loose 4-5mph on the top, some say its more. I lost about 4-5 when I 136ed my RX-1. If your into short to moderate length drags on the snow I think the 136 works awesome, if your looking for a lake racer and racing for a mile+, stick with the 121.