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PrzeChuj PrzeChuj is offline
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Default 08-05-2017, 07:02 AM

Terry this may be a stupid question. But does adjusting FF and duty bias only change it for current map or are the changes happening across the whole map selection? If I'm running map 2 with bef and decided to throw in a higher ethanol mixture and run map seven would I have to fine tune it also? And if so when I go back to map 2 are my changes saved?


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Default 08-05-2017, 09:00 AM

Quote:
Originally Posted by PrzeChuj
Terry this may be a stupid question. But does adjusting FF and duty bias only change it for current map or are the changes happening across the whole map selection? If I'm running map 2 with bef and decided to throw in a higher ethanol mixture and run map seven would I have to fine tune it also? And if so when I go back to map 2 are my changes saved?
For twin turbo N54 firmware the dutybias settings are global for all maps. Once the curve is set properly it should scale properly across all plausible boost profiles.


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PrzeChuj PrzeChuj is offline
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Default 08-05-2017, 09:36 AM

That makes life alot easier once the curve is set. Love the bms product line and support you guys are unmatched in the tuning world. Would u recommend me setting my curve and then finishing my meth system and set it up after words or before ?


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(#104)
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Default 08-05-2017, 12:35 PM

I'd dial it in close to what you expect to run for a boost profile most of the time.


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zort zort is offline
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Default 08-05-2017, 03:55 PM

Quote:
Originally Posted by Terry @ BMS
For twin turbo N54 firmware the dutybias settings are global for all maps. Once the curve is set properly it should scale properly across all plausible boost profiles.
This is good info.
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orteeze orteeze is offline
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Default 09-13-2017, 01:56 PM

In regards to the N55 DB Tuning on a PS2, if I disabled FF and my boost target is fairly close, but there is still some separation between FF and PWM; do I continue raising FF? Wouldn't that throw me over target?


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Default 09-13-2017, 03:38 PM

It's a pneumatic system so you just want FF in the ballpark. The PID will drive boost to target as long as its ranged closely. Once done FF learning should be on to account seasonal changes and WG wear and tear.


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Default 09-15-2017, 11:27 AM

Quote:
Originally Posted by Terry @ BMS
It's a pneumatic system so you just want FF in the ballpark. The PID will drive boost to target as long as its ranged closely. Once done FF learning should be on to account seasonal changes and WG wear and tear.
What are the risks of leaving FF learning off? I've found that if I am tuning with strictly 2500-6500 pulls, FF will optimize to that, but then if I'm driving around and decide to do drop 2 gears and blast off from 4K, the FF then starts to learn down (due to overboosting), if I do that enough, it makes going back to tuning 2500-6500 slow because it needs to learn back up. It makes my car feel inconsistent due to my most recent driving style.

At the moment, I've turned FF learning off and have found a decent setting for 2500-6500 tuning. This setting also has minimal overboost (that I've seen) when blasting off from 4K. I'm less worried about the overboost as my current setup doesn't seem to be affected by it. That being said, I'm pretty neurotic about my logs and evaluate almost every one.

Are there other risks that I may not be thinking about? Any suggestions on other solutions to this issue?


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