no i wouldnt go smaller...mines a d16z6, i have a 57 trim t3/t04e....i love it..mine spools fine....it doesnt spool until like 6000rpms in 1st gear....no complaints there from me..why would i want the bitch to spin in 1st....haha...but as far as alot of lagg....soon as i shift outa first....into 2nd....mines fully boosted. no lagg here..and if you doing a roll start..Brake Boost that bitch. http://www.youtube.com/watch?v=7QJfZPOpBII there is mine....spoolin fine, and that was with slippin clutch, couldnt slam her into gear.