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E85 Audi A3 1.8t conversion
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Topic: E85 Audi A3 1.8t conversion (Read 543 times)
Dave567
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E85 Audi A3 1.8t conversion
« on: August 22, 2024, 10:19:08 AM »
Good evening,
I'm having a problem converting an Audi A3 1.8t to E85.
In fact, I modified the KFLF card and the FKKVS card, replacing the 1 with 0.85, but the car chatters at idle and backfires even though the mixture should be rich enough not to have a problem.
Do you have any idea to resolve the problem ?
Thank you in advance for your help
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dal
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Re: E85 Audi A3 1.8t conversion
« Reply #1 on: August 22, 2024, 11:06:27 AM »
Revert this and read this page:
https://s4wiki.com/wiki/Tuning
You are completely lost, and risking your engine.
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Dave567
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Re: E85 Audi A3 1.8t conversion
« Reply #2 on: August 22, 2024, 01:38:57 PM »
Good evening,
I don't understand why it has a risk for the engine since according to the s4 wiki, the KFLF map serves as a base injection map and the FKKVS map serves as an enrichment map for zones from 0 to 30%.
Furthermore, according to certain forum messages it seems to indicate that these two maps should be modified, perhaps I should also have modified the KRKTE map ?
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aef
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Re: E85 Audi A3 1.8t conversion
« Reply #3 on: August 23, 2024, 12:01:37 AM »
revert your changes back to stock and just change your krkte by 30% because you need roughly 30% more e85 than on pump fuel.
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Dave567
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Re: E85 Audi A3 1.8t conversion
« Reply #4 on: August 23, 2024, 08:37:42 AM »
Hi aef,
Thank you for your answer, I modified the KRKTE map going from 0.10311 m/s to 0.17000 m/s and the car works correctly, the lambda value is slightly too rich 0.986 instead of 1 but that does not seem pose a problem.
I still need to modify the KFZW/KFZW2 and KFZWOP/KFZWOP2 maps in order to add 4° of ignition advance.
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