Ignition Retard Limit
#62
#63
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And did you change only one address?
88590015 is 133E, stock value 00CB
Not sure if address is universal or different in other ROMs.
Have you tried lower then -20?
The maximum possible retard should be -27, but not sure if there are additional checks that would limit it before that.
Sorry for so many questions, I don't have an Evo to test on.
Thanks.
#65
I have not tried to lose timming -20 in the map, I'll try another day ...
My ecu took 88840617 ALS (88840013 stock) max retard 1 and 2 = 233
The explosions are very strong!
My ecu took 88840617 ALS (88840013 stock) max retard 1 and 2 = 233
The explosions are very strong!
#72
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So are we going to get a table to be able to make this adjustment? If we get a table, I am willing to test the heck out of it. I am not keen on going into the MUT to make change.
#74
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I've been sniffing around the subroutine that sets the ignition retard limit, and it appears that in the newer ROMs, there are two ignition retard limit tables that are used for two different operating conditions. Not sure yet on what conditions these are, but here are the two tables for the 8859XX15 and the 9653XX06. They may both need to be set more neg for ignition to retard further under all conditions. Note that the max possible neg value is about -28 deg. Should be easy for people running newer JDM, EDM, and ADM ROMs to find the additional table by comparing the offset between the two addresses.
8859XX15:
<scaling name="IgnTimingECUa" units="deg" toexpr="61-x*90/256" frexpr="(61-x)*256/90" format="%.1f" min="-30" max="50" inc="1" storagetype="uint16" endian="big"/>
<table name="Ignition Retard Limit #1" category="Timing" address="205e" type="1D" level="1" scaling="IgnTimingECUa"/>
<table name="Ignition Retard Limit #2" category="Timing" address="133e" type="1D" level="1" scaling="IgnTimingECUa"/>
9653XX06:
<scaling name="IgnTimingECUa" units="deg" toexpr="61-x*90/256" frexpr="(61-x)*256/90" format="%.1f" min="-30" max="50" inc="1" storagetype="uint16" endian="big"/>
<table name="Ignition Retard Limit #1" category="Timing" address="2438" type="1D" level="1" scaling="IgnTimingECUa"/>
<table name="Ignition Retard Limit #2" category="Timing" address="173e" type="1D" level="1" scaling="IgnTimingECUa"/>
88570008-88570014, 88580013-88580015, 88840016, 88900006
<scaling name="IgnTimingECUa" units="deg" toexpr="61-x*90/256" frexpr="(61-x)*256/90" format="%.1f" min="-30" max="50" inc="1" storagetype="uint16" endian="big"/>
<table name="Ignition Retard Limit #1" category="Timing" address="2038" type="1D" level="1" scaling="IgnTimingECUa"/>
<table name="Ignition Retard Limit #2" category="Timing" address="133e" type="1D" level="1" scaling="IgnTimingECUa"/>
9417XXXX has only one ignition retard limit table:
<scaling name="IgnTimingECUa" units="deg" toexpr="61-x*90/256" frexpr="(61-x)*256/90" format="%.1f" min="-30" max="50" inc="1" storagetype="uint16" endian="big"/>
<table name="Ignition Retard Limit #2" category="Timing" address="173e" type="1D" level="1" scaling="IgnTimingECUa"/>
8859XX15:
<scaling name="IgnTimingECUa" units="deg" toexpr="61-x*90/256" frexpr="(61-x)*256/90" format="%.1f" min="-30" max="50" inc="1" storagetype="uint16" endian="big"/>
<table name="Ignition Retard Limit #1" category="Timing" address="205e" type="1D" level="1" scaling="IgnTimingECUa"/>
<table name="Ignition Retard Limit #2" category="Timing" address="133e" type="1D" level="1" scaling="IgnTimingECUa"/>
9653XX06:
<scaling name="IgnTimingECUa" units="deg" toexpr="61-x*90/256" frexpr="(61-x)*256/90" format="%.1f" min="-30" max="50" inc="1" storagetype="uint16" endian="big"/>
<table name="Ignition Retard Limit #1" category="Timing" address="2438" type="1D" level="1" scaling="IgnTimingECUa"/>
<table name="Ignition Retard Limit #2" category="Timing" address="173e" type="1D" level="1" scaling="IgnTimingECUa"/>
88570008-88570014, 88580013-88580015, 88840016, 88900006
<scaling name="IgnTimingECUa" units="deg" toexpr="61-x*90/256" frexpr="(61-x)*256/90" format="%.1f" min="-30" max="50" inc="1" storagetype="uint16" endian="big"/>
<table name="Ignition Retard Limit #1" category="Timing" address="2038" type="1D" level="1" scaling="IgnTimingECUa"/>
<table name="Ignition Retard Limit #2" category="Timing" address="133e" type="1D" level="1" scaling="IgnTimingECUa"/>
9417XXXX has only one ignition retard limit table:
<scaling name="IgnTimingECUa" units="deg" toexpr="61-x*90/256" frexpr="(61-x)*256/90" format="%.1f" min="-30" max="50" inc="1" storagetype="uint16" endian="big"/>
<table name="Ignition Retard Limit #2" category="Timing" address="173e" type="1D" level="1" scaling="IgnTimingECUa"/>
Last edited by mrfred; Dec 18, 2009 at 06:35 AM.