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2Addicts | BMW 2-Series forum Technical Topics N55 (M235i) Engine, Transmission, Exhaust, Tuning BM3 STAGE 2 ACN 91 OCT logs, knock, and timing off

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      05-09-2020, 02:39 AM   #1
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Question BM3 STAGE 2 ACN 91 OCT logs, knock, and timing off

https://www.bootmod3.net/log?id=5eb6...0b4338a08e2f69

https://www.bootmod3.net/log?id=5eb6...729b7f9e6c2c85

https://www.bootmod3.net/log?id=5eb6...90c60781373b57

https://www.bootmod3.net/log?id=5eb6...729b7f9e6c2c8b



I literally could be looking at the lunar landing or logs from my car and truly both of them I have no idea what’s going on, I just installed an FMIC on my 2015 235i and loaded the ACN 91 stage 2 BM3 tune, I went for a drive and the car felt....lackluster, like it was pulling timing, took a few logs and that appears to be the case, along with maybe a knock? At first I was worried I had a boost leak from the intercooler install but that doesn’t appear to be the case

I live in Los Angeles and understand the gas here is terrible, previously I was running the regular stage 1 tune and the car felt great, drove a few track days that way too, but knew that when the ACN tune was a single I should do that, recently switched to the ACN tune but since upgraded the charge pipe and FMIC after previously only having catless DP, a few people recommended octane booster? But I feel like that’s avoiding the problem
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      05-09-2020, 11:10 AM   #2
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Did you send the logs to PTF?
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      05-09-2020, 01:24 PM   #3
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Did you send the logs to PTF?

I did and I’m waiting for a response!! I actually purchased all the parts through you, I’m blown away at how good the Wagner fit
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      05-09-2020, 01:53 PM   #4
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Quote:
Originally Posted by cironephotosucks View Post
I did and I’m waiting for a response!! I actually purchased all the parts through you, I’m blown away at how good the Wagner fit


Please let us know what PTF says
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      05-09-2020, 03:56 PM   #5
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https://www.bootmod3.net/log?id=5eb7...729b014ccce836

Here is another log from today
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      05-10-2020, 03:34 PM   #6
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Ttt
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      05-19-2020, 02:30 PM   #7
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boost is good
fuel supply is good
afr is good
timing is struggling to keep up, indicating poor octane in fuel for the tune.
2 knocks = no good
MAF air flow seems low, is this stock intake?
what intercooler is this? seems inadequate.
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      06-04-2020, 02:01 AM   #8
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Quote:
Originally Posted by designatedposter View Post
boost is good
fuel supply is good
afr is good
timing is struggling to keep up, indicating poor octane in fuel for the tune.
2 knocks = no good
MAF air flow seems low, is this stock intake?
what intercooler is this? seems inadequate.


Wagner Comp 2 and dinan CAI


I sent the logs to BM3 and they turned boost down and logs look better but car still feels lack luster
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      06-04-2020, 05:48 AM   #9
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Originally Posted by cironephotosucks View Post
This log is as good as it gets for a OTS Map 👍🏻
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      06-09-2020, 03:05 PM   #10
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Switched to MHD, car rips now 🤷*♂️
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      06-10-2020, 08:01 AM   #11
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Switched to MHD, car rips now *
Logs? What feels different?
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      06-12-2020, 05:25 AM   #12
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Quote:
Originally Posted by designatedposter View Post
Logs? What feels different?

A significant increase in power, maybe runs a little bit tougher when cold, will log tomorrow, I didn’t get the adapter or logged with MHD Incase the car felt the same
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