> I'm working on an electronic shifting system for a Formula SAE car
> (motorcycle engine/tranny) We want to implement shifting utilizing
> solenoids and (of course) we're trying to do it on the cheap. 

Have a look at places like summit racing for "electric shifters". They are 
solenoids that attach to a ratchet style shifter (B&M, Hurst, etc) for drag 
racing. There are pneumatic versions (air shifters) as well.
They are hooked up to work on engine speed so that they hit the shifter 
with a constant force at when the engine reaches a set rpm. 
It may not be exactly what you need but it will give you an idea of the 
size solenoid and current requirements.

Steve.



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