SWOLN

iTrader: (6)

Hi, I do not have a lot of experience with either EcuFlash, or EvoScan, but I have been trying to read some about both over the last few days. 2 byte this, and jdm 3 bar, that, and text editor, this and map 1,2, and 3 that. It's all pretty confusing to me, and to top it off, I'm even scared to download my current map that was custom tuned via a dyno and tuner. ...You get the picture. Anyway, I have seemed to be able to log two different pulls within about 5 minutes of each other without turning the car off. The first pull has some 6 counts of knock and tappers to 5,4,3, meaning(I think) the ECU is pulling timing, (yay ECU, my car loves you). The next pull I make shows only a 2 count knock sum, and that may not even be in the same area that, the previous knocks were. So, did it change the map? By reading I learned that there are 3 maps, and that some people change them all, and some change just 1. Can someone please look at these logs and give me an opinion.

EVO8LTW

iTrader: (41)

Your timing around 4500 at full boost is overly aggressive (9-10 degrees) in my opinion and is most likely responsible for the knock.

SWOLN

iTrader: (6)

Thank you for taking a look. I understand the above. Now, what happened on the 2nd log, why did the knock sum appear as harsh.

nj1266

iTrader: (6)

Youe tuner either left the stock timing tables unchanged or even advanced the timing more than stock. You can only tell what he did if you download your map from the ECU and take a look @ it. That is the only way to tell for sure.

I also suspect that your boost is stockish since your loadcalc (though not as accurate as 2 byte load) is around 250. That is what my car did with loadcalc when it was stock.

We need to know what your AFR looks like, but since you do not have a wideband there is no way to tell. Next time log the narrowband O2 voltage. While not very accurate, it will give us an idea about where your AFR is. But do not use it for tuning, just for information.

One last thing, on the Evo 9 the majority of tuner make the three high octane ignition maps the same. We do this because we do not know the interpolation mechanism that the ECU uses to move between the three maps. If you do not make them the same, then your timing will jump around and it will be inconsistent.

fastrob691

iTrader: (9)

Log your octane value, you can see when it is pulling timing if it goes below 100, to 99, 98ish, then it will come back up and give timing back, its interesting to watch over a long hard log.

SWOLN

iTrader: (6)

Thanks guys, I'll try to get a log this weekend with those parameters. ... grow a set, and download my map too.

Mr. Evo IX

iTrader: (5)

Perform (3) 3rd gear pulls in a row and see where your knock is on the 3rd run. Also try to start logging at or around 2500 every time if you've got the stock turbo. You might also try to get a 4th gear pull so you know where you stand there.

EVO8LTW

iTrader: (41)

There can be a lot of reasons for the car knocking on one pull and not the next. The idea is for the tune to be not so aggressive that you are in that zone where it frequently pulls timing. If it does it occasionally, then no big deal, but if it does it a lot then the tune needs to be tamed a bit.

I noticed that your intake air temps are over 100. That alone can cause a much higher risk of knock. I would just continue to log it and see how frequently it knocks and under what conditions.

fastrob691

iTrader: (9)

I just noticed your intake temps and compared them to my logs, my intake temps keep going down as speed increases even though its high 90's humid as heck out here in NM, but they usually get down to around ambient-4-5 degrees but ive never seen mine climb unless idling, low speed etc, but they always drop on pulls.

SWOLN

iTrader: (6)

Yeah, it was about 95 degrees out and humidity was about 60 % the day of the run, if I'm not mistaken. What's interesting is I have the ETS 3.5 IC , and I too expected it to be cooler than it was. My first thought was that maybe EvoScan didn't log it correctly. I don't know.

Mr. Evo IX

iTrader: (5)

Evoscan measures temp pre intercooler/turbo.. at the MAF.

fastrob691

iTrader: (9)

I just logged again this morning about 88-89 degrees, prob 60% humidity, and my IAT start around 108 and after wot by the end of the run are down to 96, and this was on high boost, 25.5-26.0 psi tapering to 19.6 at 7200 rpm. I can email you a log if you give me your adress, so you can compare load/timing/temps etc.