Brief rundown.
2006 C6 Corvette.
Vararam intake
MS4 Cam / Supporting Valvetrain
American Racing Headers / Full Exhaust
M6
Owned the car for about a year, work already done to the motor. Tuned by previous owner's installer as well.
Purchased HP Tuners Pro w/LM-1 wideband, licensed the PCM last week. Been trying to read into the basic processes since.
I am finding a lot of information on version 2.24, literature everywhere for the basics. I sat awhile confused as to where some of these mentioned tables are at in v3.0. Until just today I assumed that v3.0 renamed some things and I would have to search pretty deep to find what they have been changed to. Today I pulled up a sample tune from an LS2 GTO. It seems as if the GTO in v3.0 has the Primary VE table i was looking for, whereas my E38 processor does not. It has MAF calibration tables, but no Primary VE / Main VE table that most of the previous literature I had read about had mentioned.
I did however take the car out for a scan yesterday and on this "tuned" Corvette, saw KR popping up after 4800rpm. (This is without any modification to the tune at all. Pure scanning). This pushed me to go ahead and start the basic VE tuning procedure, basing my understanding from those two MAF calibration tables (Low and High). I also created a couple graphs in the scanner based on the MAF frequency. Single line graphs Airflow vs. Hz. This was prompted from an online guide to 3.0 basics.
Using the existing cam tune, I disabled the MAF, copied the octane tables, and flashed the PCM. Pulled the scanner up and reset the LTFT's. Started scanning and took it for a decent drive. Filled up the created graphs pretty well with numbers ranging from -23 in the low Hz range to +9 up top. Saved the file and brought my laptop in to evaluate. Now if I haven't already started doing things wrong, I believe it took quite the wrong turn here. From what I had read, from here I would take those numbers and pull up my editor to those same graphs. With - numbers I would add that value to the existing number in that cell. With + numbers, I would subtract that number from the corresponding cell. Finish, flash PCM, repeat process until I start seeing -5 - 0 - +5 in all cells hit. Sounds basic. Sounds a lot like the DHP tuner I worked with years ago on my GTP. The followup scan revealed that those minor modifications did not really affect anything at all. May have even made some cells farther from 0. Thats where i began digging for information again.
Correct me if I am wrong, but it seems as if this LS2 is quite different than other processors in regards to what I am trying to do, thus the lack of that Primary VE table? I believe the numbers in the tune are represented as raw numbers rather than a percentage, opposite of what the scanner is presenting me? So editing them from scanner graphs like i was doing is somewhat correct, but rather than adding/subtracting what i was seeing, I should be multiplying by those percentages? Please someone help me out with defining this for me.
I am in no way near editing past the VE tables yet, but with the wisdom of this board, I hope to have these zero'd out and begin moving on to logging with the wideband and moving forward to eliminating this KR I am seeing.
So if anyone can clear some of this up for me, I would greatly appreciate it. It seems as if every other sample tune I pull up has these Primary VE tables easy to find and pull up. Which would make it much easier to follow some of these tutorial's directions...
Included the base Cam tune I got the car with and the first couple of graphs i created for VE tuning purposes as per the 3.0 tutorial I have been studying.