low octane table being used and dont know why

went to dyno today just to get some numbers and tune was stuck on low octane table. cant figure out what is causing it.

truck is a 6.0l with 799 heads, ported and polished, comp cam, ls9 valve springs, vortech v1 centrifcal only runing 4 psi (for now). 4l80 swap, 2200 stall torque.
truck weighs 6500 lbs and is setup for sled pulling once i get the bugs out.

tried 3 good pulls. iat were super high but dont think that is what is pulling all the timing out. looked at knock and burst nock- they are zero. best i can tell is when it entered pe mode it went to low octane table. short of coping high octane to low octane im not sure how to fix it. it is a 2 bar operating system with maf failed. (not even one installed on truck)

You have 7 degrees of timing being removed because of the IAT temps.

So it's turning that 9 degrees of timing into 2 degrees of timing plus you have a IAT multipler that is 1.40 which makes the timing pull even greater. So it's taking away another 1-3 degrees of timing. If it was running off the low octane timing table it would be 1 degree of timing minus 7 giving you -6 degrees of timing plus the multipler.

You are over looking the simple stuff here.



I see some other big problems with this tune. It says you are running 30lb/hr injectors and those are way way way too small. The VE table is showing that you are compensating for something with how high those values are and the log shows it's way out of injector. It hit over 118% duty cylce.

You are going to hurt something if you don't fix this injector issue and those IAT temps. And remove the 1 bar MAP channel, there can't be more than one MAP channel in the logs as it skew the data in the charts/graphs.

IAT + Multiplier = -8.4*, so its not running off the low octane running off high octane just with modifiers.