Running E47 and love this tune. Stock wheels and tires. Don’t love the lack of traction so I picked up a set of 17” G5 alloys 17x7 +42. Im set on running Nankang NS2r’s and am wondering if I should increase my diameter from 25” or lower it or stay the same? Here’s my dyno run. Thanks!

 

Some guys go down, I went to the Hoosier 26x8 slicks and they worked well but I was already running 4.45 gears. Only time my car ever hooked off the line running a 2 step, leaving at 5lbs boost at around 4800 rpm but I still slipped the clutch coming out of the hole.