Looking at Corvette forums should answer your question, but since Datsun nutters are all fairly intelligent and knowledgable folk, I can guees the switching you talk about is the valet switch used to control power when loaning the car to your kids or getting it parked. The Lotus designed engine is not like a VTEC Honda as has already been written, all the cams are driven all the time. Power is cut controlling the injector pulses I think, though I could be wrong as it's been a while since I was in the Corvette forums Oh and Phunk your holiness can you please hurry up and infest my bosses arsehole with boils, as I have been asking nicely for some time now...thank you God...