I've been seriously considering 4.10's as well, my only question is for the quarter mile (with nothing more than mild bolt-ons, etc) are you guys able to keep it out of 5th gear? I was doing some mental math and at 3.27's, the top of 4th (I'm saying 5500 rpm) would be about 135-140 (based on 37 mph at 1500 rpm in 4th), so with 4.10's it would be about 110 or so, which could be close to the trap speed after 4.10's and a few small mods, correct?
What are you guys actually seeing?
2002 Mustang GT: 5-spd, 96k: CAI, IAC restrictor plate, Mac Prochamber O/R, Borla Stingers
268 rwhp / 312 lb-ft
2015 Chevy Colorado 4cyl, 6-spd manual
1972 Yamaha CT2 175cc