Originally Posted by Jumperalex

I understand that the general reason to turn off lean spool is to get more consistent and thus tunable AFRs. I also noticed that a lot of people also like the less spiky boost response during spool up.

But what I've been wondering is why not adjust lean spool RPM such that it only happens where we aren't quiet worried about AFR yet and where boost tends to struggle the most to build. I am thinking allow lean spool up to about 3500 rpm. That way you get the faster spool in cases where you might not want to downshift but then after 3500 spool-up isn't too fsat to overshoot and AFRs aren't impacted.

Thoughts?

Originally Posted by Jumperalex

I'm sure you are understanding me I guess I would respond with the question that don't I still want to tune the fuel table for more general driving. Then allow lean spool to kick in to lean things out further for better spool. I mean that IS the original intent and if it works it would seem worth it to keep it where we don't mind the ecu mucking about with the AFR ... under 3500 rpm.

Originally Posted by Pd1

Here are the lean spool tables for the Evo 8 94170008:

------------
<table name="Lean Spool Start RPM" category="Misc" address="1680" type="1D" level="1" scaling="RPMStatLimit"/>

<table name="Lean Spool Stop RPM" category="Misc" address="1684" type="1D" level="1" scaling="RPMStatLimit"/>

<table name="Lean Spool Load Threshold" category="Misc" address="39A2" type="2D" level="1" scaling="Load8">
<table name="input value" address="63DA" type="X Axis" elements="14" scaling="RPM"/>
</table>

<table name="Lean Spool Trailing Time (Rich Side)" category="Misc" address="397A" type="2D" level="1" scaling="uint8">
<table name="input value" address="63DA" type="X Axis" elements="14" scaling="RPM"/>
</table>

<table name="Lean Spool Trailing Time (Lean Side)" category="Misc" address="398E" type="2D" level="1" scaling="uint8">
<table name="input value" address="63DA" type="X Axis" elements="14" scaling="RPM"/>
</table>

<table name="Min Temp for Lean Spool" category="Misc" address="167E" type="1D" level="1" scaling="Temp"/>

<table name="Lean Spool Enable Load Hysteresis" category="Misc" address="167C" type="1D" level="1" scaling="Load16"/>

<table name="Lean Spool AFR Mapping" category="Misc" address="39B6" type="2D" level="1" scaling="AFR">
<table name="base AFR" address="6400" type="X Axis" elements="7" scaling="AFR16"/>
</table>

<table name="Lean Spool AFR below Enable" category="Misc" address="1682" type="1D" level="1" scaling="AFR16"/>

<table name="Lean Spool Clip Value" category="Misc" address="1686" type="1D" level="1" scaling="AFR16"/>
------------

You'll also need to add this line to the "evo7base.xml" file:

------------
<scaling name="AFR16" units="AFR" toexpr="14.7*128/x" frexpr="14.7*128/x" format="%.1f" min="8" max="20" inc="0.1" storagetype="uint16" endian="little"/>

Originally Posted by nj1266

I did add the sacling as per Pd1's instructions. I selected "uint8" from the scaling drop down menu.

Are you saying that the defined tables should read in rpm rather than 224 and 80 if I change something else?

Originally Posted by mrfred

ok. That is one scaling that can be used, but its not the one the will display the data in RPM. Try adding these entries to your 88590015.xml file:

<table name="Lean Spool Start RPM" category="Misc" address="1680" type="1D" level="1" scaling="RPMStatLimit"/>

<table name="Lean Spool Stop RPM" category="Misc" address="1684" type="1D" level="1" scaling="RPMStatLimit"/>

Restart ECUFlash after you add the entries.

Originally Posted by Mr. Evo IX

Ok, havent been in this thread in a long time and another thread brought me back in here. Now I'm confused as ever. These quotes are from page 6.

This is the way that was first defined to disable Lean Spool, most people have changed both the 224 and 80 to 48 as per page 1 of this thread. Also could someone clarify how 80 and 224 = 2500 and 7000?



Then I see this post by mrfred saying we can view it in rpm scaling, sounds good to me. Also KevinD mentioned that having the same values for start / stop causes a sputtering issue. I've had a little misfire issue for a long time that I can't figure out so I was very interested in what he had to say.



However, I opened a stock 88590015 rom (Actually a Tephra-Mod rom) and with the scaling above the values are Start RPM 3250 and Stop RPM 1250 which doesnt seem right at all as they are supposed to be 2500 and 7000. Running ECU Flash version 1.30.