When I was on Nitto's with similar IRS mods I would rarely cut under a 2.0 60 ft. Switched to Viking DA shocks front and rear and Mickey Thompson ET street 2 18's and it cuts low 1.6 60 ft's on stock clutch and race weight of 4000lbs+ in my vert. I think it has 1.5's in it with a better clutch. Shocks and tire switch were the best mods I did to get this thing moving out.