just made the changes and will flash before i drive home from work, hopefully will get enough driving in to datalog...

okay so here's a pull with the 91 octane tune and still the same tank of 93 as all my previous logs

http://www.datazap.me/u/silver-ignit...g=0&data=1-2-5

I think it looks pretty good, what do you guys think?

already a lot better! (i think!)
but maybe between 6000 and 7000 you could remove a degree of advance, since your flkc is a between -1 and around -2 ?

Agree with @Walla Walla needs a bit more pulled 6000-7000 maybe -1,

seems strange to have to remove so much on 93 USA, maybe you got a bad batch, happend to a mate of mine a couple of weeks ago, tune was fine then filled up at normal supplier outlet (98RON OZ fuel)) and soon after knocks like crazy IAM about 0.6 where its usually solid at 1. Suspect station had filled tank with lower octane fuel (he checked his receipt and was correct octane), after he filled up again a couple of days later at different outlet all ok same fuel.



http://www.datazap.me/u/silver-ignit...7-12&solo=6-12

So between 6000-7000 I want to subtract a degree of advance from the Ignition Timing - Advance folder in the Base Timing B map, correct?

Yes correct,

unless you want to wait and try different fuel or octane booster ?
its strange 93 octane should be better than that

I've had the same spot, running 94 octane in canada, now i don't have my BPB installed yet so i don't if that's anything but our gas has a bad reputation.

I might just switch to the 91 rom just cause our gas sucks and i cant get 94 everywhere i might end up.

Running A01C 93octage Stage 2 UEL

This log has 4 3rd gear pulls each had the same area of knock,

http://www.datazap.me/u/hagbard/aug3...om=15553-16183

http://www.datazap.me/u/hagbard/aug3...om=14039-14594

http://www.datazap.me/u/hagbard/aug3...om=12709-12874

http://www.datazap.me/u/hagbard/aug3...om=11037-11289

Pulled some timing and got this now.

http://www.datazap.me/u/hagbard/aug-...zoom=5427-5808

http://www.datazap.me/u/hagbard/aug-...zoom=6997-7287

just the od -.65 in the lower rpm

http://datazap.me/u/silver-ignition/...=0&data=1-4-12

there's a lot of knock correction happening now...

how much km/miles since you flashed?

there is a lot, but it seems like small correction, as @steve99 said, under -.07 you should not really worry about it. The correction is bigger than the knock itself as i understand, (to be sure to "stop" the knocking situation, that it wont knock multiple times)

i'm doing a long term datalog to see the evolution of those knock, and also to spot tendency of know (where and how strong) and it's seems that, with time, your short term and long term fuel trim seems to developp, and produce less knock. i'll post my results in a few days. maybe it will help to build some kind of guideline, of what is normal, and what is not!

it's really better, you've worked at the right spot!
how much timing did you remove?

for the gas, if it's 94 petro can, it really have a bad reputation. it contain ethanol, and it seems to produce more knock. but, there are some debate on this...

But the negitive amount is less than before, its a bummer to have to remove the timing. That area is where the new tune added timing over the old one 2 or 3 degrees in places. We have same issue here in OZ our fuel just not as good as where shiv is. But we do find that different brands of fuel can effect knock even though it same octane rating and with no ethanol content.

I rearly would try a different brand of fuel then if no luck, pull a bit more at the effected load/rpm points where the knock is try just over half of what the ecu is removing. The fuel trim and knock learning is pretty quick usually minutes unless you have big fuel trims which you dont.

this was shortly after the adjustments and re-flash…maybe more miles on the flash will smooth it over a bit? I'll drive to work tomorrow and do a pull on the way home to see

I'm on a new tank now…that last tank was Shell V-Power 93 which I understand is a favorite among sports car tuners. This tank is from Valero, 93 octane. Still on the 91 tune with a degree pulled from the 1.10 and 1.20 load columns between 6000 and 6800

I'll put a few more miles on it and try another log. Wish the almighty @Shiv@Openflash would chime in and tell me if I'm on the right track...

i don't know, but from what i've logged, 2 days after flash (yesterday), on a 20 min drive (home to work, 8 km highway, 9 km downtown with light traffic) i had 13 knock reccorded.

today, same drive, 4 knock issue.... so it seems that it could get better with time... but still, not a lot of data to back this up!

with @steve99 comment, i'm starting to think I should try this long run log with different gas brand each week, just to see!