Corvette Z06 Forum banner
1 - 5 of 5 Posts

·
Registered
Joined
·
9 Posts
Discussion Starter · #1 ·
Whoever has the 3.90 gers in their Z06, I'de like to know what performance enhancements it has afforded you in acceleration, either from a stand still or after downshifting. Does anyone know what mph you are shifting at in 1st, 2nd, 3rd with these 3.90 gears compared to stock 3.42 gears?
 

·
Registered
Joined
·
17,744 Posts
Corvette Z06 with M12 manual and 3.90 gears
Gear Ratio Final MPH @ 6500 RPM

1 11.58 43.6
2 8.07 62.5
3 5.58 90.5
4 3.90 129.4
5 3.28 154.0
6 2.18 231.1 theoretical
 

·
Registered
Joined
·
2,014 Posts
I've had 3.90's on a near stock car for over a year. I do believe the car is funner to drive. The acceleration is better but it is hard to appreciate on F1 tires.With drag radials you will feel the difference more. From a stoplight, it will likely more difficult to launch, and thus hurt your short time. (Will take more finesse). Anyway a great, fun mod just don't want you to think you'll be pulling several car lengths on another z06 with 3.42's.
 

·
Registered
Joined
·
329 Posts
IT L GO`s speeds at 6500 are about right, but the speedo & tach lag so much if you wait for those speeds to shift you will have hit the limiter! I shift at about 38, 58, & 88, The 390`s really wake up an almost stock Z! :cheers:
 
1 - 5 of 5 Posts
Top