hi all, about those dodgey memcals, all they use is a resistor to make the ecu think its getting cooler air yes? well what if i soldered a variable resistor, (the ones with knobs and adjsutable, like hi-fi volume thingies) would that mean ive got controlable a/f ratio from that nob? just something i thought of and wondering if it works, or will it kill my motor?

and what was the difference between bt1 ecus and normal ones?