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Three20i Three20i is offline
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Default BMW 320i JB4 Log Review - 03-18-2018, 02:22 PM

Hello,

I have a 2014 BMW 320i (EWG) with the below mods:

- JB4 Stage 2
- Aftermarket Intercooler
- Down pipe
- Injen Intake on the way
- E30

I had done a few pulls back to back earlier today in pretty hot Florida weather. There were a couple of pulls that were not captured prior to these, that should explain the IATs. What can I do about my fuel trims? The car is running really strong, literally zero issues. Power delivery is very smooth.

Secondly, I’d really like to start using Map 6. I want to run a map very similar to Map 5, with the only difference being target boost at 19 psi. What’s the best way to go about doing this? Any input and advice is appreciated.

Thank you
Attached Files
File Type: csv JB4 Map 5 Log 1.csv (5.7 KB, 24 views)
File Type: csv JB4 Map 5 Log 2.csv (5.7 KB, 16 views)

Last edited by Three20i; 03-18-2018 at 11:38 PM..
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Steve @ BMS/Fuel-It!'s Avatar
Steve @ BMS/Fuel-It! Steve @ BMS/Fuel-It! is offline
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Default 03-19-2018, 07:13 AM

Raise your FOL to 70.

19psi is a pretty big jump from 15psi. You'll want to work your way up and verify the timing and fueling as you do.



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Three20i Three20i is offline
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Default 03-19-2018, 07:41 AM

Hi Steve,

Thank you very much for the feedback. I will modify the FOL and post another log.

I see that even though I am targeting 17psi, the most I'm hitting on a pretty hot day is usually around 15.9 psi. What do you recommend I do to actually HIT 17 psi? Will adding the intake help? I don't imagine 17 psi being too hard on the engine as stock boost on a 328i is around 17psi. I can start there, and share logs here on my way up to 19. I would even be happy actually hitting 18psi on hotter days.

Thanks again!
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Default 03-19-2018, 08:11 AM

FF will continue to learn up. If boost continues to fall off up top you can adjust the DB's.



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Three20i Three20i is offline
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Default 03-19-2018, 09:58 AM

Hi Steve,

What DB values do you suggest if boost continues to fall off top end? A general suggestion is fine. Looks like as of right now they're set to 0 if I'm not mistaken. What does this mean?
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Three20i Three20i is offline
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Default 03-19-2018, 04:22 PM

Hi Steve,

I have went ahead and tried some experimenting on Map 6, with boost at 18 psi, safety at 19 psi, and FOL now at 70 as opposed to 50. Trims have actually come down a bit. I've noticed that I'm overboosting a bit now - what do you suggest? Should I raise boost safety level? I have not yet messed with the Duty Bias and am looking for some suggestions. Logs appear to be fine otherwise, but confirmation is always nice. See attached.

Cheers!
Attached Files
File Type: csv map 6 pull.csv (4.8 KB, 15 views)
File Type: csv map 6 pull 2.csv (4.7 KB, 15 views)

Last edited by Three20i; 03-19-2018 at 04:48 PM..
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Three20i Three20i is offline
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Default 03-20-2018, 09:00 AM

Just looking for a quick review of the most recent logs in the post above this one.

Thank you!
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Default 03-20-2018, 09:02 AM

Boost behavior looks normal to me. I'd run the latest EWG N20 firmware and perhaps look to shape duty bias manually by RPM if you're looking to more precisely hit the boost target you've selected.


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Three20i Three20i is offline
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Default 03-20-2018, 09:48 AM

Hi Terry,

Awesome! I'll go ahead and update the firmware when I get a chance.

So the bits of overboost aren't harmful, are they? I just want to make sure I'm not damaging anything. I saw as high as 20.2 psi with safety at 19, but I've since upped the safety to 21 psi. Is that okay?

Any suggestions on duty cycles? I'm pretty new to messing with those parameters. Once again, thank you very much.
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Three20i Three20i is offline
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Default 03-22-2018, 04:16 AM

Bump!
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alfanatix alfanatix is offline
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Default 03-22-2018, 07:05 AM

to prevent the over boosting try to play with the Duty Bias settings.

can check it out here
http://www.n54tech.com/forums/showthread.php?t=29893
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Three20i Three20i is offline
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Default 03-22-2018, 12:24 PM

Thanks, alfanatix. I'm more concerned with confirming that the boosting over target is not doing any long term damage to the engine. I'm having a bit of trouble wrapping my mind around the duty bias concept but I'm sure I'll get it!
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