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DDDD DDDD is offline
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Join Date: Jan 2007
Posts: 1,077
Originally Posted by sandgroper View Post
I need to pull my trans and do 2nd and 3rd,Werk can you suggest any ratio changes,part numbers etc as id like to do this while the trans is out,thanks
The 930 tranny comes with 9:38 ring and pinion.

Andial made popular the 8:41 r+pinon.

With everything else stock i.e. the individual gears, my car with 8:41 at 7000 rpms:

1st gear 45 mph stock is 55

2nd gear 78 mph stock 94

3rd gear 115 mph stock 138 mph

4th gear 156 mph stock 189 mph

2nd and 3rd gear are great at 78 and 115 mph, and fourth is really close to perfect except it could use another ten mph on top end, so fourth gear at 165 mph would still be devestating acceleration. I can spin the tires or just about shred them with this second gear and third is UNREAL 60-90mph, fourth is instant launch.

1st gear on my car is too short to be useable, so I would think 52 mph would be about right.

I have bruce anderson's 911 performance book so I can translate any speed into an actual gear number if somebody really needs that info but you are better off getting the book...pages 239 and 240.

You can use either ring and pinion and just pick what speed you want to hit in each gear and there are several ratios available.

I think 52 mph, 84 mph, 124 mph and 166 mph would be perfect for a 350 to 400 horsepower engine. That is a smidge taller than what I have.

Less turbo lag.
Old 02-22-2009, 09:03 AM
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