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      06-15-2019, 06:42 PM   #1
khoaaa
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Bm3 tune 125 lci

Hi,

Been doing some research on bm3 tuning, can't seem to find anyone that has tuned a 125i LCI model with the n20 engine; but plenty have tuned the 328/428 n20. Has anyone had any experience doing a 91 ots stage 1 bm3 tune on a 125i?


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      06-17-2019, 08:12 AM   #2
arthurtwp
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curious as well. be nice if the 125i can be pushed to the same level as the 328i on stock internals.
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      06-19-2019, 02:00 AM   #3
barry0907
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me as well. also considering JB4 but have no enough data to compare which one is more stable.
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      07-08-2019, 08:18 PM   #4
harkes
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Quote:
Originally Posted by barry0907 View Post
me as well. also considering JB4 but have no enough data to compare which one is more stable.
Please stay away from JB4. I tried to get it running perfectly on my F20 N55 for 3 years and decided to give up early this year. Running MHD now.

JB4 is ok for brute power but daily drive ability will suffer.
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      07-10-2019, 10:32 PM   #5
barry0907
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Quote:
Originally Posted by harkes View Post
Please stay away from JB4. I tried to get it running perfectly on my F20 N55 for 3 years and decided to give up early this year. Running MHD now.

JB4 is ok for brute power but daily drive ability will suffer.
useful information. I just want a reasonable power and less turbo lag which more comfortable for daily drive.
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      07-11-2019, 12:52 AM   #6
harkes
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Quote:
Originally Posted by barry0907 View Post
useful information. I just want a reasonable power and less turbo lag which more comfortable for daily drive.
Unless the OEM map (software) intentionally create lag (I highly doubt this) then a tune cannot reduce that. The lag is a consequence of the physical size of the turbo.

Do you also feel it laggy driving in Sport+ mode?
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      07-11-2019, 03:27 AM   #7
ovekvam
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Sport+ changes the pedal mapping, so you get full throttle with a smaller pedal movement. It doesn't change the lag. If the lag feels longer in Comfort mode, the lag you feel is in your ancle! :-)
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