Weird timing during log?

[fox4]

So I did 3 logs the other night, and need addvice in which direction to go wtih the SAFC. I'm running 23 psi with an E3 16g. Sorry I can't post the actual log. And I did a BLT right before I made the logs

From 3000 to 5750 my timing was between 8-11 degrees. Then at 6000 my timing jumped up to 16 degrees. I was running the same percent correction all the way across the high throtle rpm settings on the SAFC.

From reading some other threads, it sounds like when timing is consistently low through out the rpm range it is a sign that the car is running a little too rich. Could this be my deal from 3000-6000? Do I just need to lean it out? There were no apparent dips in timing. Just the huge jump right at 6000rpm.

 

[twdorris]

It's probably a case where knock retard was active prior to 6000 RPM. At 6000 RPM is probably where it all diminished to zero and you got full timing again. Hard to say without a log, though.

Thomas Dorris
ECMTuning, Inc.

 

[fox4]

It's probably a case where knock retard was active prior to 6000 RPM. At 6000 RPM is probably where it all diminished to zero and you got full timing again. Hard to say without a log, though.

Thomas Dorris
ECMTuning, Inc.

I figured that knock was playing a role in it, but on the 2nd and 3rd logs I added fuel and the timing stayed the same (very low). I guess I just don't get how it could be due to knock when my timing is low from 3000-6000 and then right at 6000 the timing jumps to 16 degrees and the car takes off.

 

[twdorris]

I guess I just don't get how it could be due to knock when my timing is low from 3000-6000 and then right at 6000 the timing jumps to 16 degrees and the car takes off.

Me either. It "should" be about 9° at 4500, 11° at 5000, 13° at 5500 and then 16° at 6000. That's the lowest you should get without knock retard. Well, it could be slightly lower depending on coolant temps and/or IAT, but in that case, it should be lower across the board. The only explanation I can come up with for timing "jumping up" would be from knock retard.

Thomas Dorris

 

[fox4]

I don't know if this will help at all, but I was logging 26lbs/min at the max for my air flow. That seems very low for an E3 16g.

 

[habitatguy187]

Me either. It "should" be about 9° at 4500, 11° at 5000, 13° at 5500 and then 16° at 6000. That's the lowest you should get without knock retard. Well, it could be slightly lower depending on coolant temps and/or IAT, but in that case, it should be lower across the board. The only explanation I can come up with for timing "jumping up" would be from knock retard.

Thomas Dorris

I've never heard of that. Does this apply to 1G's also?

 

[knochgoon24]

Why don't you log knock and AFR and see what those are doing?

 

[fox4]

Why don't you log knock and AFR and see what those are doing?

I have no way that I know of to log knock on my 2g besides link which I do not have, and my wideband is not hocked up to where it will read out on my logger.

 

[habitatguy187]

MHI Scan logs knock, plus it's inexpensive. But I think we can see that it's pretty obvious that it's knocking with such a timing retardation, unless it's like twdorris said and it's supposed to be that way

I'd like for someone to explain that to me.