915 Tranny Conversion Options Options

[Coloradocurt]

I've already done a good bit of searching and have yet to find what I'm looking for, so here goes-
Is there a good, comprehensive thread which explores/discusses the tradeoffs (functional performance, prices, availability) of the various options for converting a 915 tranny for adaptation to a 914-6 conversion project.
Thanks.

[naro914]

We have both:
In our 3.2 'street' engine car (Huey) we've run a totally stock 901 for many years with no problems. It gets used for spirited mountain/street driving, autocross, track time trials, and the occasional club/vintage race. We beefed up the CV's to 930 turbo (I think) but that's it. We use first gear all the time from stop lights/signs, around the paddock, starts on autocross, etc... It's no less useless than the 1st gear in the GT3...

In the race car with 360-ish hp (Papa Smurf), we have a 915 with modified Vellios side shift. Modified meaning it was 're-engineered' to work right, and it works great. We also have a recirculating pump and cooler on it. But I can't tell you about longevity since we have only driven on the track with it once now.

As Sixaddict said, the thing about 901's is you can have a garage full of spare 901's for the cost of a 915 side shift. I used to keep 2 spare transmissions for the track when Papa Smurf had a 901. I don't have a spare 915 because I have about $8k into this one and can't justify another $8k sitting in the trailer.

If/when someone (Clay??) comes up with a reliable and cost effective set up to use a Boxster/Boxster S trans with an air cooled engine, I may go that route with Papa Smurf. Until then, we'll keep everything as is.

Curt, my advice: keep the 901 in it. It should be fine unless you get into hard core racing...