eletronic shift tranny

[Pablo2]

About sequential design in general? No, I imagine that the internet would be your best bet. Insert sequential "drum" to pinpoint true internal sequential. I have break down pages for the Porsche units, but they don't really educate one very well.

The OP asked about electronic shift, which had me remembering a kit offered perhaps 8 or 9 years ago that could be added to any H-pattern gear box. We figured this would be a natural add-on for our dog boxes, as sort of a poor mans sequential. Unfortunately, they just wouldn't shift quickly enough for our dog box (although they may have worked fine for standard synchronized boxes). This would have allowed the steering wheel paddle as a direct option, rather than having to insert an additional selenoid system.

Gary Peloquin once showed me a VERY complicated multi selenoid system he was developing for his race car with standard VW transaxle. Too much stuff going on for my taste, but certainly showed how Gary has always thought "out of the box".

[Pablo2]

On the bikes, they have electric shift. What they do is cut either the ignition(carbed bike) or fuel(FI bike) for a split second, thats all it takes to "unload" the transmission, then an electric cylinder moves the shifter up or down. I dont think it would be that easy for a standard transmission car(different shift pattern than up or down) but i dont think its un-doable either. Would just take a little bit more work and a seperate cylinder for each gear.

On the 993 sequentials (which we had years before the more modern GT3), we had a rod coming off the standard shifter, which activated a micro switch, which in turn sent a simple signal to the Motec engine management. The Motec would retard ignition timing for .08 second, which would unload the mainshaft just long enough. This was more practical than a complete ignition cut-off, which would have had unburned fuel flowing through the heads.