I'm not nearly as technical as most of you, and this EcuFlash/EvoScan business is very confusing to me, so take it easy.

We did some EvoScan pulls the other day and some timing readings were extremely high, i'm talking 41 degrees at the highest, and high 30's throughout. Not only that but in some points it did some like -10 deg timing while at normal cruising, not WOT. WOT never showed any negative.

Yet when we tested another mildly modded Evo with the same CPU/Program/Cable etc. It seemed to show normal average timing readings.

Also after doing the pulls in my car and the other we both found 0 counts of knock throughout. Is this normal? We were thinking we had to preset the knock values in volts or something beforehand for it to work, but we had no idea.

Let me know what we're doing wrong here. I will post the files when i get them Emailed to me.

Edit: I guess my timing tables are correct for normal cruising.
Edit: For some reason directly after the pull we couldn't see any knock counts, but now looking at the logs i see them, thanks for everybody's help.
Edit: Everything looked good with the tune, the tuner asked that the logs be removed, so they are no longer in the thread, sorry.

 

You are saying you offset timing -10* and didn't see a change on the EVOSCAN?

I see 40* timing at cruise.
I see 20* timing at redline WOT on pump gas.

I'm not sure how your ECUTEK adjusts timing but with the XEDE that I use the overall timing number is unaffected by what I tell the XEDE to retard. If I enter -10* the overal timing from the OBD2 port will still read the same number it read before because the xede ulters the "known possition" of the crank and adjusts it prior to entering the ECU.

 

^No i didn't touch the timing. I'm just saying that durring cruise i showed -10* of timing in the EvoScan log, and i'm just wondering if that means my ECU is pulling timing? Which would be weird considering i showed 0 counts of knock... And as long as that 40* of timing is normal then i'm not worried, i just always thought at most timing was advanced into the teens.

Also FYI i'm not sure if this has been covered already, but EvoScan works just fine with an EcuTek ECU, even without unlocking it with MalibuJacks software.

Thanks guys .

 

looked at your logs.. thats normal..
instance where you go 40* is when you lift off on your throttle.. thost are low load high rpms region.. nothing to worry about..

your -10 means you hit a region down low rpms which has not been modified..meaning your car is capable of higher loads than what was tuned.. or not tuned

 

Your knocking at peak, you likely need to add some fuel and put it out or you got bad gas.

Log looks normal just a little on the detonating side. Turn down the boost if its too high also

 

C6C6CH3vo: huh? I only saw a max of 3 knock counts at peak boost. Do you really consider that to be detonating??

I always thought that was more like random noise than real detonation. His tune seems fine to me.

 

I looked at your 2nd log. You need to do a legitimate 3rd or 4th gear WOT run. Start at 2500 rpm and end at 7400. You started at 3200 rom (tps=100) and ended at 6968 rpm. IMO, this is not adequate. You need a longer rpm range to get better quality data.

You are getting 1-3 knock sum from 4500 rpm to 6900 rpm. Had gone all the way to 7500 rpm, you probably would have had more knock sum. Some say that a knock sum of 3-7 is ok. Some others disagree and say that your knock sum should not exceed 2. No one knows for sure what X knock sum would lead to Y pulled timing. Most people speculate about this based on their past experience with DSMs.

What is your AFR in the 4500-6900 area? You can either richen your AFR in this area or slightly back off the timing.

 

Sorry, I guess I'm too conservative, I consider at least consecutive 1 counts at 100 TPS with no less than 1/2 sec worth of logs with evoscan knocking.

 

I really wish we could get the final word on this! I am pretty sure at one point it was said if its less than 10 its negligible.

 

I have doen about 17 logs with Evoscan and I have seen so many different variations of knock sum pulling and not pulling timing. There is no pattern to what I have logged. In some cases I get 5 knock sum and no timing pull and in other cases I get 1 knock sum with 1* timing pull. The highest knock sum I recorded is 10 and a corresponding pull of 5*. I have also logged 5 and 3 knock sum with no timing pull.

No one really knows the real relationship between ks and timing pull. There must be other variables involved that we do not know about.

 

Well boys, i dont understand why it showed 0 knock counts when i looked at it, but you guys are finding them.

Anyway, i'm not sure of my AFR's, i haven't got a chance to check yet, but it looks like i probably should.

To me, i dont like to see any knock counts, so this tune worries me a little but, but in the end it is very good for a mail-in.

This tune was a mail-in from a not as popular as some others tuner, and i highly doubt he had a preset tune for my mod combo, so i'm actually surprised he did as well as he did.

Thanks though guys, your help was much appreciated. Now if only someone can teach me how to read these .

 

2627373736272829110111112314214215216117118121
The left colum is knock and right is your timing. Knock is under knock sum and your car is running steep timing (16 degrees at 6600rpm while being pulled) thats actually impressive for al gore-****-fuel - about the same as me with 93 oct and mthanol

 

you're always going to see the occasional knock sum, even in a 100% stock unmodified car. it concerned me at first too, now i just accept it LOL.

 

I understand that, but stock Evo's see less then 2 counts, i'm more then doubling that.

Where are you guys seeing knock sums? Which colum? Also do you guys see any timing being pulled due to detonation on there?

 

Who says a stock EVO will only make 2 counts? All cars are different.. some make 2.. some make 10.