a map clamp? dont think so, from I understand it just intercepts signals going to the injector grounds, using the tach signal as a base...I wasnt aware it even tapped into the map sensor signal, but then I could have a skewed view...maybe it really intercepts signals from the MAP/IAT and TPS sensors...in which case I can see it working as a sort of map clamp...can anyone verify this? if it does...what voltage range can it clamp? 4.3-4.8v perhaps? if so I can see other uses for a SAFC...interesting possibilities, and then it might be useful for tuning after all, hmm