WOT Tuning, Timing/AFR DA Tables Ecmlink

[dankboiwonder]

Running into small amounts of knock when my turbo spools up. It hits about 24psi and then drops and stabilizes at 19. I am trying to get my MAP to match my boostest, and get my AFR to match the AFRest (and the DA table) I was looking at my timing table to get the little knock to go away. Can you make it too low? Is it more of a transition thing? What is a good AFR during spool up? How much should the timing drop in that area?

EvoIII16g, 9.2:1 CR motor, 680cc etc..

Thanks for looking

 

[snowborder714]

1. Did you know you have a DTC code being thrown?

2. I assume you're trying to dial in the MAF to use to dial in the SD table?

3. Your AFRatioEst/wideband and BoostEst/MAP lines look really good

4. In regards to the knock, I'd just try and lower timing a degree or two. Shouldn't have any issues then.

5. Looks like you can use some MAF Comp adjustment just before full boost.

 

[dankboiwonder]

The DTC is from when I broke the tach wire off fixing some boost leaks near the PCV valve and the car wouldn't start. I meant to clear it, just forgot.

I do want to dial the maf in good to get a real nice SD table built.

When my boostest and actual are all lined up nice I think the car is still too rich (compared to the afrest and the DA table) So I was gonna lower the global a little more.

This link is a log from this morning, take note to my intake temps, that is supposed to have an effect on my boostest.

ECMTuning User Support Forums

Thanks again,
Mike

 

[snowborder714]

When my boostest and actual are all lined up nice I think the car is still too rich (compared to the afrest and the DA table) So I was gonna lower the global a little more.

Once you get the lined up, do your AFR's match what the MaxOct DA table shows (use track datalog when reviewing this table with the log)? If so, then that's a good thing. All you need to do then to lean it out is to change the DA table values that will be affected, as well as surrounding cells to smooth it out. Since your airflow is calibrated correctly, it will target the new AFR's you just set.

 

[dankboiwonder]

If the DA table is at 10.8 and they are aligned (boostest&map) its at about 10.5 actual. I did not know I had to factor in the intake air temps for boostest when I was doing this so after work I am gonna try to get them back on track and see where my AFR is and what the DA table (which I think is a direct relation of the new AFRest value) says as well. There was a variance before, but I wasn't paying attention to the actual temp of the air when making adjustments to my mafcomp to get the boostest in line with the map.

 

[dankboiwonder]

Can I get a log of a WOT pull that is all dialed in and that has the DA tables all set up? I am not sure what my target AFR should be while building boost. As well as the timing. 99% of the time when I get knock, it is from doing a pull from 2500-7k but it happens right when my boost kicks in and my timing is doing a nosedive. I pulled some timing and tried to transition it good but I just wanted some examples to see if I am on the right track. I didn't have a good piece of road last night to do a good pull but I will get one in an hour or so on the way to work.

Also, my AFR matches the DA table at parts of the WOT but not the beginning or a couple of parts near the end

Thanks for your help man, much appreciated.



-this log does not hit the load tables that I did most of the adjustments to because it was 2nd gear and I rolled into it late, but I just attached it for reference

5. Looks like you can use some MAF Comp adjustment just before full boost.

The only problem I see is that when the two are so different, its about the same HZ as when they are aligned. (2400)

Here are 2 3rd gear pulls from this morning, seems like I have the knock pretty much eliminated. Seems good to me, the AFR does get a little rich towards the end. Let me know what you think.

 

[snowborder714]

I'd say both of those pulls look pretty good.

 

[dankboiwonder]

I noticed that when I go WOT in 2nd I get 2 or 3 little burps, or misses. I thought it might of been some knock or something but then when I duplicated the behavior and caught it on a log, there is no knock. Maybe a minor misfire, but I don't see anything on the log. It was just like a little misfire or burp type feeling. Can you see it on this log at all? I'm thinking about checking my plugs and wires, but like I said, I don't see it on the log. Its not a major misfire or anything, just 2 or 3 little pops that are real quick, not in succession. I felt it after right after the boost was full on and once more towards the end.

 

[snowborder714]

I don't see anything abnormal in the log.

I'd do a boost leak test, check the turbo for any shaft play, and check the plugs/wires/coil pack.

 

[Archer Fabrications]

I noticed that when I go WOT in 2nd I get 2 or 3 little burps, or misses. I thought it might of been some knock or something but then when I duplicated the behavior and caught it on a log, there is no knock. Maybe a minor misfire, but I don't see anything on the log. It was just like a little misfire or burp type feeling. Can you see it on this log at all? I'm thinking about checking my plugs and wires, but like I said, I don't see it on the log. Its not a major misfire or anything, just 2 or 3 little pops that are real quick, not in succession. I felt it after right after the boost was full on and once more towards the end.

i get this exact same thing!!!!!! little misfires and pops when in full boost.... i enabled my DTC for random misfire and sure enough the CEL came on.... im trying to battle that as well but i have some other issues.. how are you guys dialing in the MAF clamp for speed density.. snowboarder i havent been able to plug in the MAF yet because im using 2 wires for my GM IAT.. not sure if that will affect the working order of the MAF itself.... how do you get rid of misfires? is it an indication of running too rich?

 

[snowborder714]

Utilizing the IAT wires for the IAT will cause issues if you want to run the MAS again without flipping the wires back to normal.

I can't say I'd really know how to get rid of misfires. It could be a host of various issues anywhere from AFR to a bad knock sensor (and some stuff in between). I haven't seen any misfire CEL's since I got link (out of sight, out of mind)

 

[Archer Fabrications]

Utilizing the IAT wires for the IAT will cause issues if you want to run the MAS again without flipping the wires back to normal.

I can't say I'd really know how to get rid of misfires. It could be a host of various issues anywhere from AFR to a bad knock sensor (and some stuff in between). I haven't seen any misfire CEL's since I got link (out of sight, out of mind)

yeah i disabled the CEL check for random misfires cause the damn 1g CAS i can tell you i have a brand new knock sensor haha how do you adjust the MAF clamp? my boost est is way off from my omni at lower boost and vacuum but seems to be pretty dead on at full boost... is there a way to adjust it similar to how i adjusted lin wideband? my biggest issue with everything right now is calibrating airflow perfectly. my fuel trims are decent right now and ill post another log in my thread. but im getting a consistent - or + 5% Comb FT and STFT LTFT low is around -2.90 ( sorry dont mean to thread jack was just looking for info on the maf clamp dealio.

 

[snowborder714]

Have you read the help file in link about MAF Clamp? Go to that tab and click on the little ? bubble in the bottom right corner.

 

[Archer Fabrications]

Have you read the help file in link about MAF Clamp? Go to that tab and click on the little ? bubble in the bottom right corner.

i did, but ill get out of this thread since i have my own

 

[dankboiwonder]

So I took care of my little misfire situation. I am ready to switch over to SD so I grabbed a log on a long drive to use the SDratio tool. When I used the tool I get some numbers that I think I should ignore, and a good amount of areas that were not reached. I plan on using a smoothed out version of this table and do some SD VE adjust (combinedft) to get it in the areas that were not used. And to hopefully get it all dialed in right. I am not sure how much the numbers are allowed to vary from cell to cell and was hoping you could help me smooth out the results of the SDratio adjustments. I was going to then play with the boost to hit different cells in WOT. I watched a video and saw an excel spreadsheet that you had made to dial in WOT also. Is this still your preferred method? Should I be using air to get my wideband to match the DA table or fuel? What would be a good way to smooth out the table, and what numbers should I ignore?

Thanks,
Mike

My log is too big to attach

 

[snowborder714]

I am not sure how much the numbers are allowed to vary from cell to cell and was hoping you could help me smooth out the results of the SDratio adjustments.

I tend to try and keep things below a 10% variance from cell to cell.

Is this still your preferred method?

Yes, but that will only work once you have switched over to SD and are doing WOT tuning only.

Should I be using air to get my wideband to match the DA table or fuel?

You'll be adjusting the SD table once you switch to get the AFRatioEst value to line up with your wideband. You'll know you've got it when they both match what is in the MaxOct DA table.

What would be a good way to smooth out the table, and what numbers should I ignore?

Just go at it by hand and make some adjustments.

I wouldn't ignore any numbers unless it's ridiculously high or low. At that point, you may have another problem to address (e.g. if you get 120%+ SD values, you need to adjust global to bring them down).