Right now you need a 2.5 pulley and slicks for 12’s because of our Heaton M62 and traction problems. I should be mid 13’s on street tires and stock blower with a 2.8 pulley. The problem is the M62 “baisic roots blower” gets very inefficient and a 2.8 pulley is the smallest you can go without overspinning it. But there are some people who have 2.5 pulleys and but meth kits on to help with the heat generated from that crappy blower. But with a pulley that size you are cutting the life of the blower in half anyways. There are turbo swap balts running well over 300whp, there is also a twinscrew swap being fabbed as well as a procharger swap. We have to much heat and parasitic loss to make any HUGE numbers withe the stock blower.
sorry for the long rant, thats just some info about our setups for you guys