gry54
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« on: November 19, 2019, 01:20:19 PM »
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Hi
everyone
I have a z20leh astra
i read read and read the forum for understaning me7
but i have a problem
after engine build with high compression pistons (8.8 to 9.4)
i can not adjust fueling at wot (lamfa KFLBTS)
it stays lean 12.X
I think changing compression ratios causing ecu to calculate load wrongly
are there any maps related compression ratios
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IamwhoIam
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« Reply #1 on: November 20, 2019, 04:29:43 AM »
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say what? have you logged your fuel pressure?
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I have no logs because I have a boost gauge (makes things easier)
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cherry
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« Reply #2 on: November 20, 2019, 04:41:21 AM »
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Opel is not my business, but are you sure KFLBTS is already active? Normally these map are active from certain egt measured or calculated... Isnt there another lambda map?
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fluke9
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« Reply #3 on: November 20, 2019, 06:30:13 AM »
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after engine build with high compression pistons (8.8 to 9.4)
Sorry for the offtopic, but why in hell would you INCREASE compression on a turbo engine ?! |
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nyet
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« Reply #4 on: November 20, 2019, 09:57:27 AM »
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Sorry for the offtopic,
but why in hell would you INCREASE compression on a turbo engine ?!
If you are running E85 or race fuel only... |
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gry54
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« Reply #5 on: November 20, 2019, 03:15:13 PM »
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say what? have you logged your fuel pressure?
Yes at first i thought fuel related issue checked (fuel pressure + fuel pressure regulator + fuel pump + injectors) everything was okay |
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gry54
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« Reply #6 on: November 20, 2019, 03:26:16 PM »
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Opel is not my business, but are you sure KFLBTS is already active? Normally these map are active from certain egt measured or calculated... Isnt there another lambda map?
i did not know that thank you for info. |
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gry54
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« Reply #7 on: November 20, 2019, 03:27:17 PM »
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Sorry for the offtopic,
but why in hell would you INCREASE compression on a turbo engine ?!
Like Nyet said i will use e50 and wmi |
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gry54
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« Reply #8 on: November 20, 2019, 03:33:43 PM »
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Not to damage engine i removed some igntion advance and boost
This are the maps i changed for fueling
KFLBTS+LAMFA+FKKVS
additional info friend of mine gave me this tip and tested
if i remove maf connector engine is running at wot 10.X to 9.X afr on pump gas
i added files if you can check
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« Last Edit: November 21, 2019, 01:52:43 AM by gry54 »
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dilly
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« Reply #9 on: November 22, 2019, 01:07:22 AM »
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thought no maf by default ecu dumps fuel as a fail safe? this would explain the pig rich afr's
am i wrong?
besides high compression pistons what else is done?
maf housing, turbo inlet etc. did you scale your maf correctly if you changed the housing etc.
we need to know these things
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gry54
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« Reply #10 on: November 23, 2019, 11:06:34 PM »
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fluke9
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« Reply #11 on: December 05, 2019, 01:45:21 PM »
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thought no maf by default ecu dumps fuel as a fail safe? this would explain the pig rich afr's
am i wrong?
Without its primary load input the ecu will resort to alpha/n as fueling strategy as it does not know anything about load anymore. It only relies on the throttlebody angle then. So it must fuel for the highest load which can occur with the current angle... |
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gry54
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« Reply #12 on: December 05, 2019, 03:08:06 PM »
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update
problem partly fixed it was fuel pump related
right know it follows target afr with 0.3 0.4 leaner.
Suggestins are welcome.
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