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Author Topic: Fueling 1.8t stroke e50 bosch 1700cc  (Read 1402 times)
Kejsi
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« on: December 28, 2023, 10:19:51 AM »

hello i have a problem with injector adaptation. The engine is a 2 liter stroker me7.5 on e50 fuel without maf and used hack 5120 map. The problem is that I have very poor lambda at idle, while driving it is okey, wot same okey. After deleting the correction, the engine is at lambda 1 for a while and reaches lambda 1, only to have the short term correction jump up to lambda 1.3 after a few moments.     
Krkte 0.03367 temin 0.2 tvub 12v 1, 14v 0.71

I am counting on the help of the group, many times you guys helped me Tongue
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Kejsi
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« Reply #1 on: December 28, 2023, 10:35:49 AM »

I tried to do fkkvs correction but setting even 1.99 for idle range the problem still appears

screenshot of the current adjustments
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_nameless
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« Reply #2 on: December 28, 2023, 10:36:52 AM »

I tried to do fkkvs correction but setting even 1.99 for idle range the problem still appears
http://nefariousmotorsports.com/forum/index.php?topic=12361.0title=
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Giving your mom a tuneup
Kejsi
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« Reply #3 on: December 28, 2023, 11:00:16 AM »

sorry already added, idle are at the end

logs witch active nolra
« Last Edit: December 28, 2023, 11:17:22 AM by Kejsi » Logged
aef
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« Reply #4 on: January 02, 2024, 03:37:10 AM »

Tvub values according to ecumaster black software wizard
0280158827
8v 2,16
10v 1,59
12v 1,28
14v 1,06
16v 0,94

your krkte 0.03367 is most likely wrong.

example calculation for 980cc only because i know they are petrol injectors and i can find the qstat value in a datasheet.
980cc * 0,670g/cc (bosch datensheet) = 656,6
50,2624 * 0,4940056583052142 (because of 2 liter stroker) / 656,6 = 0,03781 new KRKTE (working for me with maf and trims everything fine)

calculation backwards with your 0.03367
0.03367 * 1700 (because i dont know the qstat of yours) / 50,2624 = 1,138 * 4 = 4.5 liter stroker

this was only with stock fuel and e0 to e5 content.

taking e50 into account with 20% bigger injectors
0.03367 * 1700 (because i dont know the qstat of yours) * 1,2 (because of 20%) / 50,2624 = 1,366 * 4 = 5.4 liter stroker

start with a fkkvs all 1s and fix your krkte at first. i wonder how your car is starting with this current krkte value.



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pitercsg
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« Reply #5 on: January 02, 2024, 04:37:27 PM »

It's not about the tune. Due to the lack of maf and running shitty alpha-n your IAT sensor is getting heat soaked -that's why it occurs only at idle.
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nyet
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« Reply #6 on: January 02, 2024, 05:29:59 PM »

alpha-n sucks ass. expect nothing but fueling problems unless you are always at the same temp/altitude/humidity.
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ME7.1 tuning guide
ECUx Plot
ME7Sum checksum
Trim heatmap tool

Please do not ask me for tunes. I'm here to help people make their own.

Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
Kejsi
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« Reply #7 on: January 10, 2024, 05:36:40 AM »

It's not about the tune. Due to the lack of maf and running shitty alpha-n your IAT sensor is getting heat soaked -that's why it occurs only at idle.

you're right, I use alpha n Can you give me the name of the map that I could use to make fuel corrections based on the IAT sensor?
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Kejsi
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« Reply #8 on: January 10, 2024, 06:04:32 AM »

Tvub values according to ecumaster black software wizard
0280158827
8v 2,16
10v 1,59
12v 1,28
14v 1,06
16v 0,94

your krkte 0.03367 is most likely wrong.

example calculation for 980cc only because i know they are petrol injectors and i can find the qstat value in a datasheet.
980cc * 0,670g/cc (bosch datensheet) = 656,6
50,2624 * 0,4940056583052142 (because of 2 liter stroker) / 656,6 = 0,03781 new KRKTE (working for me with maf and trims everything fine)

calculation backwards with your 0.03367
0.03367 * 1700 (because i dont know the qstat of yours) / 50,2624 = 1,138 * 4 = 4.5 liter stroker

this was only with stock fuel and e0 to e5 content.

taking e50 into account with 20% bigger injectors
0.03367 * 1700 (because i dont know the qstat of yours) * 1,2 (because of 20%) / 50,2624 = 1,366 * 4 = 5.4 liter stroker

start with a fkkvs all 1s and fix your krkte at first. i wonder how your car is starting with this current krkte value.





with this setting, the car starts well at idle, after warming up, the mixture is lean while driving as above, FKKVS correction, but the long-term correction reaches -20 percent I set a lower shortcut value 0.032333 and continue testing what bothers me the most is the lack of MAF, unfortunately I have to bypass it, currently the engine is on a TFSI crankshaft, but soon it will be built on a
tdi crankshaft, with a gridle plate and I would like to reach 750 hp, then the MAF will definitely be redundant

calibration process completed, thanks to everyone for the advice long-term corrections idle 0.38% partial -3.9%

« Last Edit: February 12, 2024, 12:53:11 PM by Kejsi » Logged
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