JohnBradley

iTrader: (30)

So I have been chasing my tail trying to figure out why I have knock in the high 5 low 6K region of my map occasionally. Then I decide to pay really close attention to my fuel map and what the AFR should be and what it was. I logged a full point lean ALL OF THE SUDDEN (switched back to a wideband for this...reason why narrowband cant be trusted as it barely moved) in this region and couldnt explain it. It hadnt been there before but there it was unexplained and unwanted.

Then it dawned on me. I added the Lean spool enable/disable definition and thought I wanted to drop it from its "stock" location. I had never changed it before that point and it had been set at 6000. I had lowered it 5750. Guess where my 1 point lean started? I had upped the disable per JC's reccomendation from 7000 to where I thought it would do the most good.

Remove that function entirely, setting it at 1500 enable/disable. Fueling issues are now completely normal and the knock is suppressed and I am adding timing back in. Has anyone else logged this or I am the first to notice it here?

jcsbanks

The lean spool stuff seems to work on timers and load thresholds as well. We might be better off entirely without it so we know where we are.

I think you've moved the lean spool enable/disable around a lot more than most though. My understanding is that below lean spool enable RPM it runs a leaner value (fixed - not off the fuel map, hence the problem on JDM when it is at 3500 RPM), then it scales it about 1 AFR leaner (according to a map), then it returns to the underlying fuel map at lean spool disable. Does this explain what you're seeing then?

coolguycooz

Wait there is a rpm range from enable to disable?

jcsbanks

3500-7000 on JDM GSR IX, usually 2500-7000 on others.

JohnBradley

iTrader: (30)

John, thats exactly what I saw as well as some others I know. At the engage point it went from 11:1 to 12:1 everytime. I hadnt logged with a wideband in awhile and the narrowband logging hadnt really showed much of a change (not that much volts to be sure). My tune is set for use without it, so thats why I set the enable/disable so low and the same rpm.

AutoXer

iTrader: (1)

Curious... Is this what causes the plateau in the spoolup region as seen here:

https://www.evolutionm.net/forums/sh...d.php?t=217264

coolguycooz

so on that graph it looks like its enabled at 2800 or so. So you can disable that and tune without it, also why did they set it up that way, why is it set to lean out right before spool?

tabio42

iTrader: (15)

I think I have only one number for lean spool. Does that mean it is activated before this number and disabled after?

JohnBradley

iTrader: (30)

1281 is the enable hex, 1285 is the disable. IF you want to tune without either set the numbers the same if you have both hex inputted or set the one you have (if its disable, 1285) at 0.

Evo_Jay

iTrader: (17)

Is the parameter you talk bout "boost enhancement (anit-lag)" or a different parameter?

JohnBradley

iTrader: (30)

Different, this is something that doesnt appear in any of the normal .xml's. You have to add these definitions, then add scaling, then adjust. I spose you dont actually have to add the scaling function, but it makes for an easier interface.

PVD04

iTrader: (23)

Has anyone checked if this setting exists on the Evo8 Rom, or is it just on the 9?

-Paul

AutoXer

iTrader: (1)

The graph was with stock Evo 8 lean spool settings. I'm not sure what they are set to.

JohnBradley

iTrader: (30)

2500-7000 as well. I looked at it last night, but dont have it in front of me right now. If I remember the hex values are the same; 1281 and 1285, respectively.

PVD04

iTrader: (23)

In my Evo 8 ROM address 1281 is 7969 and address 1285 is 1992. That would make my enable 7969 and my disable 1992. Is it possible they are reversed in the Evo8 ROM, or do those addresses represent something entirely different in the Evo8 ROM?

Thanks,

Paul