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newbee newbee is offline
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Default 08-21-2021, 03:40 AM

Originally Posted by Steve @ BMS/Fuel-It!
The new setup parameter changes are listed in the release notes.

General setup parameters are listed here...

F Series N20 4-banger JB4 - N54Tech.com - International Turbo Racing Discussion
Excuse me, my vehicle now shows fault code 105202,Do you know the reason? This matter bothers me very much
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Steve @ BMS/Fuel-It! Steve @ BMS/Fuel-It! is offline
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Default 08-23-2021, 10:45 AM

What is the description for that code?

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ergi ergi is offline
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Default 04-26-2022, 05:39 AM

Hi Terry,

I installed the JB4 N20 EWG on my X3 XDrive 20i N20B20A (same engine than 328i with 10:1 ratio but 10 psi boost max, not 11:1 and 8 psi max like the 320i)
The car runs very well with 98 RON with power similar to the XDrive28i.
With map 5, FF and EWG wires, the AFR during WOT decrease from 14,5 to 12,9 at high rpm. My log is with the 4th gear of 8AT, equal to 3rd gear on 6MT.
The timing has some drops of 3 during WOT.
The best would be to get 13,5 to 12,5 AFR and a little less timing.

After several looks at the logs in this forum, I note that the AFR seems to decrease when IAT is over 125-130F under heavy load, I suppose we reach the part of the map to keep the engine safe.
Looking at your IAT spoof function for the B48 B58 JB4, I would test a resistor in parallel (around 3kOhms) with the T sensor of the TMAP sensor. In that way the IAT read by DME would be higher of 35-40F in the middle range and identical on highest part of the T sensor curve. (the resistor in parallel make the curve more flat with about the same end)

What is your feeling about it ? Thanks
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ergi ergi is offline
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Default 04-26-2022, 06:15 AM

TMap temp curves in C for stock (red) and 3 kohms resistor in parallel (blue).
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