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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N55 Turbo Engine / Drivetrain / Exhaust Modifications > Couple knocks in BM3 stage 1 pull. Anyone care to look?
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      10-23-2020, 02:40 AM   #23
R1d3r
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Originally Posted by thejeremyman9 View Post
You only had one knock and it was right on a gear change so i wouldnt worry about it, especially since timing looks great overall.

You did have some strange boost control and WGDC in 4th gear though... very erratic and 'wavy'. Looks like you are at altitude (low ambient pressure), which could be a factor. I would get a 4th gear log or two and see if that happens again.
Thank you very much thejeramyman9! Here is another log https://www.bootmod3.net/log?id=5f90...729b644c00339f

DA now is around 1600-700 if you are asking about that.
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      10-23-2020, 11:08 AM   #24
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Originally Posted by R1d3r View Post
Thank you very much thejeramyman9! Here is another log https://www.bootmod3.net/log?id=5f90...729b644c00339f

DA now is around 1600-700 if you are asking about that.
Timing and boost control look great. Overall log looks good, you just have a little bit of the wavy WGDC in 3rd and 4th still. I don't think its a major issue but you could always email PTF to see what they say since i dont really see it in other BM3 stage 2 93 logs.
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      10-26-2020, 05:47 AM   #25
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Originally Posted by thejeremyman9 View Post
Timing and boost control look great. Overall log looks good, you just have a little bit of the wavy WGDC in 3rd and 4th still. I don't think its a major issue but you could always email PTF to see what they say since i dont really see it in other BM3 stage 2 93 logs.
I sent an email to PTF and they provide me with a new OTS map update, I also went to a dynorun to check where is my car. I'm fully satisfied at this point :
400hp/620nm
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      10-26-2020, 12:46 PM   #26
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I sent an email to PTF and they provide me with a new OTS map update, I also went to a dynorun to check where is my car. I'm fully satisfied at this point :
400hp/620nm
Looks good. What kind of corrections is this running? Not clear to me if there is a ~1.04 CF, and/or if its adjusting assume 92% driveline efficiency?
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      10-27-2020, 04:07 AM   #27
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Looks good. What kind of corrections is this running? Not clear to me if there is a ~1.04 CF, and/or if its adjusting assume 92% driveline efficiency?
It says in red: Drive line efficiency 92%, which is rather high. I always use 85% for RWD.
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      10-27-2020, 11:43 AM   #28
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It says in red: Drive line efficiency 92%, which is rather high. I always use 85% for RWD.
Yes, i saw that, that's why im asking. It also has a DIN values at the bottom which i am not sure is applies as a CF?
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      10-27-2020, 01:11 PM   #29
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Looks good. What kind of corrections is this running? Not clear to me if there is a ~1.04 CF, and/or if its adjusting assume 92% driveline efficiency?

Sorry, actually I don't have any idea what exactly we are talking about I'm a totally lame. I guess its something how its configured the Dyno to the car, but I cant tell you. I could ask the guys which operate with it for more details if you want to discuss.
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      10-27-2020, 02:08 PM   #30
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Originally Posted by R1d3r View Post
Sorry, actually I don't have any idea what exactly we are talking about I'm a totally lame. I guess its something how its configured the Dyno to the car, but I cant tell you. I could ask the guys which operate with it for more details if you want to discuss.
Naw, it's ok, no need to follow up. Basically we were just wondering if the results were corrected for weather/atmospheric conditions, and/or, if they were adjusted to be HP/TQ output at the engine rather than at the wheels. Based on the red text on the image it looks like they were scaled to be engine HP/TQ assuming 92% DE, but not obvious if they were corrected for weather. Not important though, since the absolute value of the numbers isnt what matters.

Glad the car is working well for you though
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      10-27-2020, 08:55 PM   #31
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Originally Posted by thejeremyman9 View Post
Yeah i remember seeing that erratic WGDC up top in the stage 1 logs as well, so it's not isolated to you. Did you not see it in v6.4? I think we've concluded its an artifact of the tune given it happens across multiple people's cars. You can always email PTF support and see what they say.

Another piece of general advice - logging is great and all (and i highly recommend it), but try not to obsess over getting a 'perfect' log. There's always going to be things you can nitpick - timing isnt perfect, you have a knock here or there, you got a throttle closure, etc, but its easy to log yourself to death and it can take away from actually enjoying the car. Been there done that lol, i used to be especially obsessed with getting perfect timing (after i dealt with quite a few boost leak issues). Once you confirm you dont have issues (like a boost leak, major fuel quality or timing/knock issues, etc), try not to stress about having everything be perfect because there's always going to be some variability from time to time. Don't forget to enjoy the car
Finally got some dry weather (it was pretty cold out) to get a couple logs. Here are two v6.4 stage 1 91 octane logs running Washington state 92 oct gas. I can't find my v7.1 logs back, but the WGDC is fairly constant through the top-end of each pull.

Car setup: M235i, 6spd MT, Pure Turbo Inlet, drop-in aFe filter, VRSF CP + 5in IC.

https://www.bootmod3.net/log?id=5f95...0b43028e1f99cb
https://www.bootmod3.net/log?id=5f95...0b430319a46c1b
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      10-27-2020, 11:14 PM   #32
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Originally Posted by dalderks View Post
Finally got some dry weather (it was pretty cold out) to get a couple logs. Here are two v6.4 stage 1 91 octane logs running Washington state 92 oct gas. I can't find my v7.1 logs back, but the WGDC is fairly constant through the top-end of each pull.

Car setup: M235i, 6spd MT, Pure Turbo Inlet, drop-in aFe filter, VRSF CP + 5in IC.

https://www.bootmod3.net/log?id=5f95...0b43028e1f99cb
https://www.bootmod3.net/log?id=5f95...0b430319a46c1b
These logs look really clean. Everything looks to be exactly where it should be. It's interesting that throttle opens slowly here rather than just jumping to 100% immediately as it typically does on the newer tune versions. Aside from that, nothing really stands out.
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