I ordered a Egay chip today for my PR4 ECU.My question is there anyone that is using an aftermarket Air/Fuel controller for their OBD-0 LS or B20's? If so what are you using and did you notice a difference?

Becareful with them ebay chip or egay as you called it. Those maps aren't always right. You can take two motors with the same mod, but one will perform better. It's better to get your ecu chipped and tune for that motor. As for aftermarket air/fuel controller on pre odo, your not gonna feel any different, you might feel a throttle respond. people usually use the apexi safc and afc neo. I think the controller is a waste of money. Get the ecu chipped and tune.

Yeah I figured the controller wouldnt do much, i'm just tryin to do little things without building the motor right now. I have a chipped 0bd1 ecu that i will be using once i build the mtoor im building for it now though.