I have used 1600cc with resistor box. You should run richer Air Fuel / ratios. I would prefer, using and injector driver instead of resistor box, to have a better IDLE.
I know it's going to idle super rich and not be a good choice for street driving but it's my weekend track car . Even my precision 1000's idle bad. I was just wondering how rich they need to be to idle. Are they as bad as the pte 1000's or worse. I know Evans-tuning has an article about them being better then pte 1600's