ECMlink DSMlink V3 knock problems

[gixxer6]

I am fairly new to tuning. I'm having trouble with knock. I'm not sure if it's phantom knock? Can someone a little more experienced take a look at my log and see if I am missing something?

I just installed a new OEM knock sensor. The lifters don't tick, I'm running a full tank of 93 (my area has 10% ethanol)

Any advice is greatly appreciated!

 

[GSLENK]

I'm going after a similar problem.

From my searches, it looks like phantom knock. There are steps you should take to verify this. (race gas, playing with timing fuel lower+richer, to see if it can be eliminated) If neither remedy it is likely phantom.

I am under the impression that knock does no exist at that low rpm and boost level (vac level) unless something is terribly wrong with timing/afr.

For starters, a lot of people just turn up the ALS/Knock tab limits to about 30-60% TPS and 2500-4000 RPM.

The main idea that any knock under 0-1 lbs of boost is negligible or non-existent. Also at a that low of a TPS it should be ignored or else coming out of park can be a nightmare.

Look for rattling stuff at your own anguish, a lot of people fruitlessly chase PK to seemingly no end.

What are your mods? I do not see a logged boost Gauge but based on Boost Est (which IS inaccurate a lot) it seems like you are still in vacuum.

 

[gixxer6]

I have not tried race fuel yet, but I have been playing with the timing and afr. From what I read, my timing is relatively low, and my afr's are in the low 11's. I don't have my boost logged, but I am running 20psi on my evo3 16g. With my stock engine the VE should make the estimated boost correct at around 5000rpm. My mods are listed in my profile.

From what I read, I don't need to be too concerned with the off boost/low load knock. What I am worried about is the performance robbing, engine damaging knock shown during the 3rd gear pull.

I have been under the hood looking for rattles without success. My next step is race fuel, but I was hoping that someone would look at my log and could see something that I am missing.

 

[GSLENK]

I didn't look at your WOT section. Now I did. It looks like the first round of knock is triggered by phantom knock.

The second round is clearly triggered again by something. It seems reasonable to require 5-6* at (first) full spool boost (its what your ecu nets you in this case) It may be on the low side but seems ok. Lower your map to get a timing curve that falls a little faster, to 6* perhaps, then slowly ramps up to 12* at the very very end.

First try adding fuel, if you cross 11 or 10.5 then adding more fuel shouldn't help, leave it as lean as you are comfortable, without knocking.

Your timing table could use some smoothing.

If dropping 2 psi lets you save 2 degrees of timing, I would probably try that route. only a dyno or your butt dyno or track can make that decision.

At my novice glance it looks like you are on the right track. afrs line up. I never did maf comp, so I hate seeing the sliders being used, but I don't think you have a choice.

Based on searches in these forums, that probably the most free advice you are gonna get...

 

[gixxer6]

afrs line up. I never did maf comp, so I hate seeing the sliders being used, but I don't think you have a choice.

Based on searches in these forums, that probably the most free advice you are gonna get...

I'm not sure what you mean about using the sliders? Which sliders? The maf comp?

Thanks for the advice.

 

[WES_393]

I agree that the knock settings should be adjusted. With your setup I would have it set to 3K RPM and 50% throttle. I'd also try pulling 1-2 degrees of timing right at 3k-4k RPM. With just those two things done you should see a difference.

At my novice glance it looks like you are on the right track. afrs line up. I never did maf comp, so I hate seeing the sliders being used, but I don't think you have a choice.

MAFComp is being used correctly here. That's why the AFR and AFR Est line up so well.

 

[gixxer6]

I agree that the knock settings should be adjusted. With your setup I would have it set to 3K RPM and 50% throttle. I'd also try pulling 1-2 degrees of timing right at 3k-4k RPM. With just those two things done you should see a difference.

I will give this a try and report back.

I agree that the knock settings should be adjusted. With your setup I would have it set to 3K RPM and 50% throttle. I'd also try pulling 1-2 degrees of timing right at 3k-4k RPM. With just those two things done you should see a difference.

Here is the log file after these changes. I think I am the right track now. I am a little surprised that I need to run this low of timing. From all of the reading I have done about others running setups similar to mine that run 20* of timing...