07-07-2020, 12:44 PM | #1 |
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BM3Tuning X4 M40i vs MHD X4 M40i
A little throwback here
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07-14-2020, 08:46 PM | #3 |
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I didn't but some people upgrade charge-pipe only
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07-15-2020, 12:13 AM | #4 |
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07-19-2020, 01:55 PM | #5 |
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Not for me in 2-2.5yrs but others yes
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07-21-2020, 07:03 PM | #6 |
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hoping ill have that same luck i just ordered the bm3 tune. I can't tune yet my cars in the shop getting a full paint correction ceramic coat. so this weekend I'm gonna have some fun. looking into a catless down pipe as well.
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08-31-2020, 02:30 PM | #7 |
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2017 X4 M40i
Thank you for the vids. I recently tuned the wifes 2017 X4 M40i and around the same time added a VRSF charge pipe. Her stock charge pipe had blown about a month before the tune, so for the week we had the stock CP on there I had the same issue I'm about to explain:
I added the BM3 N55 OTS Stage 1, 93 Oct. At WOT at about 6500 rpm, I get a turbo stutter, like I've hit a wall, then at 7000 rpm when the gear shifts it goes away. I recall having a similar issue on my E70 X5M years ago with a tune, but always blamed that crappy 6sp trans. I can paddle shift at 6500 and no issues, it's just that last little 500 rpm surge. I tried to go back in and see if I loaded the Stg 1, 91 Oct if it would do it, but I'm not going to buy another license for that. I have a tuned 2015 N55 Stage 1, 93 Oct, 335i now and do not have this issue. Now she thinks her car is going to blow up or something Thoughts?
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09-09-2020, 10:35 AM | #8 | |
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Quote:
Most likely you either have old spark plugs and you're noticing a misfire.
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