Sorry didn't make my post clear.

0x173e unit 16 or 0x173f unit 8 works for all evo 7 and 8 roms.

0x133e unit 16 works for all evo 9 roms.

 

Has anyone checked to see if changing these numbers actually moves the timing? It may be something to do with crank position referencing? Maybe you are allowed -15 but it may have moved the base timing +5. I know for certain the trigger system itself can support ALOT more retard than -10. I have used ~30ATDC on other ecu's for certain ALS'.

BTW 173E is correct on the 7GTA too.

 

my car definatley run worse on -15 over -10... I would say its working...

 

Ok I had a play around with 88570008-v5.10fix-mods on my mates Evo 9 Fq320 today.

Setting 0x133e to 220 did allow -15° to be run, setting to 237 allowed - 18° and 255 allowed it to clip -22° and we had some nice flames

Changing 0x2038 seemed to stop things getting more violent so I left it at it's default of 195.

 

you mean 0x133e for 88570008 yeah?

 

Yeh thats the 1 (sorry was late at night here when I posted

 

Finally I tried it: it seems that adding to 0x133e and 0x2038 the same value I can get 1/3 of ignition retard for every unit added. For example I added 21 to both (so they are set to 0xE0) and I logged -17 degrees (21/3 = 7). If it is proportional we should get at max (0xFF - 0xCB) / 3 = 17 more retard, so -27 degrees should be possible. Not tested yet, but I don't think we will get more than -20...

Anyone tested something more?

 

EDIT: wrong thread

 

I had reason to look at this for a chap today and spotted this thread from the dimm past - thought I would do an update here.

The addressing is valid for:
88570008
88580013
88580014

<scaling name="RetardHex8" units="MAX Retard Degrees - hex" toexpr="x" frexpr="x" format="%02X" min="0" max="260" inc="1" storagetype="uint8" endian="big"/>

<scaling name="RetardLimitMitsu" units="Spark Retard, Degrees ATDC" toexpr="-5+(x-160)*256/728" frexpr="160+(5+x)*728/256" format="%.1f" min="-200" max="255" inc="0.3" storagetype="uint8" endian="big"/>

<scaling name="RetardLimitMrFred" units="Spark Retard, Degrees" toexpr="61-x*89.66/256" frexpr="(61-x)*256/89.66" format="%.1f" min="-28" max="61" inc="0.3" storagetype="uint8" endian="big"/>

<table name="Ignition Spark Retard Limit #1 Degrees - MrFred" category="Timing" address="133F" type="1D" scaling="RetardLimitMrFred"/>
<table name="Ignition Spark Retard Limit #1 Degrees - hex" category="Timing" address="133F" type="1D" scaling="RetardHex8"/>

<table name="Ignition Spark Retard Limit #2 Degrees - MrFred" category="Timing" address="2039" type="1D" scaling="RetardLimitMrFred"/>
<table name="Ignition Spark Retard Limit #2 Degrees - hex" category="Timing" address="2039" type="1D" scaling="RetardHex8"/>


For 88590015 Evo9
<table name="Ignition Spark Retard Limit #1 Degrees - MrFred" category="Timing" address="133F" type="1D" scaling="RetardLimitMrFred"/>
<table name="Ignition Spark Retard Limit #1 Degrees - hex" category="Timing" address="133F" type="1D" scaling="RetardHex8"/>

<table name="Ignition Spark Retard Limit #2 Degrees - MrFred" category="Timing" address="205E" type="1D" scaling="RetardLimitMrFred"/>
<table name="Ignition Spark Retard Limit #2 Degrees - hex" category="Timing" address="205E" type="1D" scaling="RetardHex8"/>



RetardLimitMrFred is an approximation but gives a close result with the degrees showing as negative (-) meaning ATDC.

RetardLimitMitsu is the true scaling with the result in degrees ATDC.

 

level=3 just limits when ecuflash will display it, ie developer/user/etc...

 

good work guys....

so what is the lowest anyone has had on the 7 rom (90550001)

.....me want fire

 

-10

 

so they don't work on 90550001 ?

man so many things to look at.. sigh!!!

 

More tests done with 88840017. At the end, modifying both 0x133e and 0x2038 with same value with rules as above, I can get no more than -20 degrees of retard. Any try to go below -20 in timing map will become a +50 in log.

 

I haven't checked the new setting on 90550001, as my car only lived for 18 miles and died again

Once it is up and running propperly I will try the new setting, and see if it will retard a little more