Oddjob

9/35 3.889 S R/P, .829 5TH
8/31 3.875 S2 R/P, .778 5TH

Bigger teeth on the S2 gearset, a lot stronger than the S set. S sets were known to break when used in higher torque applications. Even stock turbos have broken S teeth in DE use.

67King

Thanks for the clarification!

333pg333

Knew you'd chime Jim.

blown 944

Thanks for the clarification.

Guess I'm just going to keep going with the turbo box. Hasn't broken yet. Might have to step up to the six speed.

Unless I can figure out how to adapt this URs4 box I have sitting here to transaxle rather than being aed

333pg333

Don't think the 968 6 speed is going to be better for you Sid? Similar ratios as the 5 speed with the S2 rp. Got charts at home if you want.
Actually curious what you think would be better for you...shorter or taller gearing? I suppose it would depend on whether you could lose a gearshift point with the taller gearing.
Also, if the taller gearing loads the turbo more or is the shorter version just basically better for straightline acceleration?

alxdgr8

The UrS4 5spd 01E has it's problems too unless it's a wide-1st 01E out of a 95.5 UrS6. Although the 968 trans doesn't have the wide-1st either...
Read more here: http://12v.org/urs/charlie_smith/01E/ind5.html
And you'd have to figure out adapting the different bellhousing, adapt the different/shorter input shaft, and weld the center diff. Axles flanges are easy though, they'll swap from the 016.

The 01E that you would want would be a FWD TDI 01E from Europe (if you were wanting to go through the hassle). It has the wide-first gear and flexible mainshaft which is more forgiveable to power.

333pg333

951, 951/S2 and 968 gearcharts.

blown 944

Patrick,

It really depends on a few things. I'm not really worried about loading the turbo. I'll use anti lag if needed.

What you really want is to be at redline at tge end of the track.
However, too much tire spin can cause an over rev situation.

The turbo box should be perfect for the power I should make. But, I'm thinking about limiting the power and focusing on the ET. At least at the beginning of the year.

It's not really about the gearing for what I need. I just need something that I can hit really hard and not worry about breaking. Yeah I know, pipe dream.

KevinGross

The 944S and 944S2 have the same dimensions (and parts except 5th) for their gearsets. The S2 pinion is indeed larger.

People who broke 944S pinions when used in 944 Turbo cars "back in the day" as a rule didn't bother to set up the pinion depth properly. The pinions broke more for this reason that its dimensions and the car's power. Lesson is that you cannot ignore pinion depth (S3 bearing shimming) and you cannot slap transmissions back together with the same shims.

Kevin
Catellus Engineering

blown 944

Sounds like you have a bit of experience building these.

In your opinion, what would be the best starting point and final if I wanted to be able to just thrash on it from a dead stop?

Obviously this is not tge preferred method, but I'd like to test it out and see how much further I can take it. I've had enough MPH to run in the 9's but never pushed the take off too hard.