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I have a 99 Corvette with 416 stroker, mild East Texas Musclecar cam. FITech intake and 55lb FITech injectors. Throttle body is from 09 G6. Stock ECM. I paid for someone to come tune it at the shop. Since that time it has severe cold start and running issues until it reaches operating temp. I'm not sure if i want to revisit the same person with it. I would rather have other input at the moment. Any help would be appreciated.
Injector data came from...?
Fitech sent me data for the injectors. The data in the tune I assume was edited by the guy who tuned it. I'm attaching the file sent by fitech.
So the entire Offset vs Volts vs Vac table is a wild guess. I do not envy you trying to tune this thing.
The same customer who owns the corvette put a fitech system on a 383 and it was nothing but a nightmare. He finally let me remove it and put a carb on it. Before this he was convinced by Jegs Fitech was good for the corvette. And was direct fit, It came with 3 BAR MAP sensor and a drive by cable throttle body, not to mention his Ebay throttle body after that. Nothing about this trip is could be enviable. Now here we are. I found a thread about converting Fitech to GM but never got my mind wrapped around just exactly how it works.
Why not just use equivalent-sized GM injectors that you can pull all the genuine data for out of a stock tune file for a vehicle that used those injectors? Injectors without data are fine for aftermarket controllers where it's all pre-loaded in the aftermarket software and you just pick the ones you have from a dropdown menu.