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Ignition Retard Limit

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Old Oct 19, 2008, 04:08 AM   #16
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Originally Posted by tephra View Post
173e doesn't work for all rom's - my first post has what 173e is in evo9 land

I looked at the code for 90550001 and its totally different... doh

Interestingly in 90550011 the 0x173e is 0xBC not 0xCB
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.
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Old Oct 19, 2008, 04:09 AM   #17
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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.
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Old Oct 19, 2008, 04:34 AM   #18
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my car definatley run worse on -15 over -10... I would say its working...
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Old Oct 20, 2008, 05:28 PM   #19
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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.

Last edited by cossie1; Oct 21, 2008 at 03:46 AM.
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Old Oct 20, 2008, 05:49 PM   #20
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you mean 0x133e for 88570008 yeah?
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Old Oct 21, 2008, 03:44 AM   #21
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Quote:
Originally Posted by tephra View Post
you mean 0x133e for 88570008 yeah?
Yeh thats the 1 (sorry was late at night here when I posted
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Old Oct 29, 2008, 12:50 PM   #22
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Originally Posted by tephra View Post
try setting 0x2038 the same as 0x133e

0x2038 should default to 0xCB as well..

edit - 2038 not 2308
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?
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Old Oct 29, 2008, 10:43 PM   #23
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EDIT: wrong thread

Last edited by acamus; Oct 29, 2008 at 10:45 PM.
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Old Oct 30, 2008, 02:30 AM   #24
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Had a play with this on AUDM9-88580013 and got something more or less sensible.

<scaling name="Retarduint16" units="MAX Retard Degrees" toexpr="(x-203)*0.333+10" frexpr="(x-203)*0.333+10" format="%0f" min="0" max="65535" inc="1" storagetype="uint16" endian="big"/>

--and--

<table name="Max Ignition Retard Degrees" category="Timing" address="133e" type="1D" level="3" scaling="Retarduint16"/>

It worked, but I dont know what the level=3 does, or if the max and min values should be doctored.
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Old Oct 30, 2008, 03:20 AM   #25
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level=3 just limits when ecuflash will display it, ie developer/user/etc...
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Old Nov 1, 2008, 01:02 PM   #26
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good work guys....

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

.....me want fire
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Old Nov 1, 2008, 01:48 PM   #27
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good work guys....

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

.....me want fire
-10
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Old Nov 2, 2008, 02:29 AM   #28
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so they don't work on 90550001 ?

man so many things to look at.. sigh!!!
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Old Nov 2, 2008, 03:29 AM   #29
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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.
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Old Nov 2, 2008, 04:02 AM   #30
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Quote:
Originally Posted by tephra View Post
so they don't work on 90550001 ?

man so many things to look at.. sigh!!!
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
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17, 90550001, 94170015, 96530006, als, change, degrees, e85, evo, gsr, ignition, retard, setting, timing, turbo

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