930 (108mm) output flange identification, Two pair with different seal landing dimensions Options

[pcar916]

Anyone know these two 108mm applications?



Both (on the right) are 108mm course-spline flanges. But as the pic below shows, the center flange has the same dimensions as the 914 flange (left) on all turned surfaces.

The 108 flange on the right is the same dimensions (on turned surfaces) as the 100mm SC flanges I use with 944 cv's on my 914.

I can just barely make out what I think may be the part number on the rightmost flange.

915.332.209/01 but this may be incorrect. It's not very distinct.

Anyone run into both at some point? My guess is that the flange on the right is from the SC era and the center one is an earlier turbo, but I'm basing that on the SC dimension match, not from actual fact.

Ideas?

[stewteral]

Anyone know these two 108mm applications?



Both (on the right) are 108mm course-spline flanges. But as the pic below shows, the center flange has the same dimensions as the 914 flange (left) on all turned surfaces.

The 108 flange on the right is the same dimensions (on turned surfaces) as the 100mm SC flanges I use with 944 cv's on my 914.

I can just barely make out what I think may be the part number on the rightmost flange.

915.332.209/01 but this may be incorrect. It's not very distinct.

Anyone run into both at some point? My guess is that the flange on the right is from the SC era and the center one is an earlier turbo, but I'm basing that on the SC dimension match, not from actual fact.

Ideas?

HI Ron,

I've been running an '78 930 trans in my 914 for 8 years on-track using standard
SC half-shafts. It was a pure plug & play deal with no mods. I picked up the 1/2 shafts at a Porsche swap meet for $85 and they are still good.

I happened to have the V8 & 930 "LUMP" out of the car and when I measured the output flanges found the measured 110 mm O.D. with the bolt center-line to the CV joints of 94mm. My output flanges are the later fine-splined version.

My Porsche 911 knowledge is not very deep, but I learned that the 930 box uses the 915 hub carrier as the Quaife TORSEN dif upgrade was the same for 930 & 915 boxes.

I'm guessing that you are also running a STRONG V8 as there is no other reason to put up with the 930,'s terrible gear ratios, except its ability to handle big power. I can atest to the fact that the 930 is bullet-proof handling my 383 Chevy 500+ HP & torque.

If you haven't been inside your 930, the gears are MONSTEROUS with a 9.5" ring gear and individual gears that remind me of a Muncie 4-Spd.

I hope this helps,

Terry