I just rechipped my p28 with a vision chip so I can actually make it to 8000 before I shift (b16a eg). but I havent sprayed it yet because these chips are supposed to advance timing right? any way I bought an msd ignition retard that turns on with the nitrous solenoid to compensate for the chips timing but I dont know how much to retard it. Any suggestion for a 50 shot or a 75 shot dry.

 

I don't think Vision makes chips for ECU's. Where'd you get this?