PRE-Z06

1.74 to a 1.63, so a tenth was a gain in 60' launching at the same rpm. Gained 3mph in the 1/8 as I was now at the top of third instead of just shifting to 3rd. The 1/4 mph was the same as I had to shift to 4th instead of being in the top of 3rd, so the 3mph was negated with the extra shift in the back half. Keep in mind this is with a base trans ratio, so the C5Z trans is already in 4th in the 1/4 and should see the mph gains.

blackula 99

Light wheel spin after a heavy burnout.. with Nitto 305/35/18's. 60ft time,{1.78 w/ 390}{1.88/2.00 with 345's.} Et's, 390 gears, 118.04 /345 gears 119.78.

craig04c5

If done properly you should not have any noise from the rear. I have DTE's 4:10's and no noise.