2.56 vs 273 gears
Thread Starter
Instructor
Joined: Jul 2017
Posts: 134
Likes: 8
2.56 vs 273 gears
I noticed that going from a 27" stock tire with the 2.56 gears to a 25.5" tire equals a 2.73 rear ratio same as the z51 performance gear. I just happen to have a pair of 315/35/17 nto5r's on 17x11 TT2's for my trans am.
Anybody think they will fit?
I'm getting a 1.85 60 ft. What should the improvement be? Any guesses?
C6 car has an A6.
Anybody think they will fit?
I'm getting a 1.85 60 ft. What should the improvement be? Any guesses?
C6 car has an A6.
Melting Slicks
Joined: Jun 2006
Posts: 2,497
Likes: 261
From: Miami Florida
Smaller tire heck yeah!!! it will you have very tall gear ratio so will notice improvement you will appreciate, not sure about the 315 mm in a base car but the shorter tires will allow for spacer if needed bolt pattern is the same.
Lift up the car put em on and try em that's how I ended up using my '06 gto drag pack on my GS.
Lift up the car put em on and try em that's how I ended up using my '06 gto drag pack on my GS.
Race Director
Joined: Sep 2007
Posts: 16,557
Likes: 2,108
From: Peoria/Phoenix AZ
C6 of Year Finalist (performance mods) 2019
A 1.85 on a stock converter is the best I ever did with DR's, so doing it with stock/street tires is kicking butt. Going from stock size street tires to a 275/40/17 DR didn't change the 60' much (maybe .01), but sure improved the consistency.
If that tire/wheel fits, then use it.
If that tire/wheel fits, then use it.
Thread Starter
Instructor
Joined: Jul 2017
Posts: 134
Likes: 8
A 1.85 on a stock converter is the best I ever did with DR's, so doing it with stock/street tires is kicking butt. Going from stock size street tires to a 275/40/17 DR didn't change the 60' much (maybe .01), but sure improved the consistency.
If that tire/wheel fits, then use it.
If that tire/wheel fits, then use it.
Last edited by handyandy1496; Feb 11, 2018 at 05:49 PM.
