virus77 wrote:set the injector correction to whatever your injectors are and you're good to go. The car will drive like stock, just dont get onto any boost, its not that hard. I drove about 20 miles like that till I got the car home and started the tuning process. I had my wideband at the time and the cruising A/F's are fine.
When I had a KAT with e-manage, I ran it strictly on the injector correction and a light timing retard at the higher end of flow and RPM. But I would probably avoid doing this at moderate to high boost levels...or at least anything that you are still using the Stock MAF for. With the MAF flow signal altered, the ECU thinks you have less load and advances the timing to take advantage of a 'lighter load'. Also since you can boost at part throttle, the ECU will use the O2 sensor for feedback and try to adjust the A/F. Tuning at WOT will generally be fine, but boosting too much at part throttle may cause a leaner mixture than is safe for the motor.
The E-Manage Ultimate(from what I've read) would be a solution for this as it drives the injectors entirely instead of allowing the ECU to do it. The ECU could no longer fight the piggy-back, which has long been the problem with piggybacks.