This is on my automatic '06 GTO with a D1-SC(~6-8psi), 1 3/4 LT headers, 60lb injectors, walbro 255, and KB BAP. I had the car professionally tuned a number of years ago and it always ran fine. I was never happy with 1/4 mile times but never had the chance to change anything back then. I do not have the stock tune for the car so my as found tune is whatever the tuner originally wrote in. I recently had the time to start getting back into the car and I was comparing this to a number of tunes from the repository and elsewhere. I noticed not much was changed from the stock tune examples I found. I have attached the as found as well as a long scan of the as found tune.
My first change was to find the injector information. I have done that and input it following the DVD. From what I read I needed to re-calibrate the MAF/VE tables if my original injector data was not input correctly. So that is were I am at now. I've gone through a few iterations of MAF adjustment (Err% x 1/2). I am looking to see if I am on the right track and wondering why my MAF curve is slowly starting to resemble the original curve. If you look at the as found there is a odd move around 3,250Hz that I have not been able to find information on. I smoothed this out but it comes back each time I adjust. It also does not look like the main VE table was touched at all so I would like to get the MAF dialed in correctly and attempt to generate the GMVE from the data as a starting point.
I am logging with a AEM 03-0300 WB placed a few inches after the front O2 sensor. I did not use heavily filtered scan data to this point but going forward I plan to filter on throttle position following the HPtuners guide example to filter out the transitional errors I am picking up.
Any help or suggestions are welcome. Trying to learn step by step so I don't really know the exact questions to ask yet.