Change RPM limit

[mbeach]

I've seen similar devices in dragsters (bracket racers) but they require an aftermarket ignition system.

Why not go with a larger pulley on your alternator instead?

[patrick_dyson]

We need the alternator to have high output when the engine is idle so we needed a smaller pulley - the alternator that we chose will do 100A@24v@1900 (alternator shaft RPM).

With the Vehicross idling at 750, we needed about 2.5:1 ratio.