My JB4 logs as requested, 26.7 PSI

obriennathaniel · 08-24-2015, 08:30 PM

So people have been asking for awhile to see my JB4 logs, well here they are

Ive been messing around with DB tuning, and I still have some work to do but here we are! this is on an E40 mix, 100% meth spray.

Also I have the timing trick installed so my IAT's are showing about 40 degrees higher than reality.

[IMG]

Untitled by blutorrent, on Flickr[/IMG]

[IMG]

Untitled by blutorrent, on Flickr[/IMG]

http://datazap.me/u/obriennathaniel/...log=0&data=1-4

http://datazap.me/u/obriennathaniel/...log=1&data=1-4

http://datazap.me/u/obriennathaniel/...log=2&data=1-4

harkes · 08-24-2015, 10:48 PM

You are overboosting quite a bit up top because your FF is too high compared to your PWM. Play with Duty Bias to get that under control. PWM not even 100% if I read it correctly - crazy haha

I gotta get that Stg 2 :P

obriennathaniel · 08-24-2015, 10:50 PM

Quote:

Originally Posted by harkes

You are overboosting quite a bit up top because your FF is too high compared to your PWM. Play with Duty Bias to get that under control. PWM not even 100% if I read it correctly - crazy haha

Lol not even! But yea I'm still messin around with the duty bias. It was perfect before I upped the boost to 27, it should be a pretty simple change.

Earthmaster · 08-25-2015, 11:40 AM

Somebody explain to me this Duty bias thing.....

harkes · 08-25-2015, 10:28 PM

Quote:

Originally Posted by Earthmaster

Somebody explain to me this Duty bias thing.....

http://www.n54tech.com/forums/showthread.php?t=29893

FF is globally controlling/scaling (together with a bunch of other parameters) the PWM signal to the turbo
DB (duty bias) is doing the local scaling

In other words - if you get over/under boost in certain areas you can use DB to finetune.

...hope I got that right

obriennathaniel · 08-26-2015, 03:58 AM

Quote:

Originally Posted by harkes

http://www.n54tech.com/forums/showthread.php?t=29893

FF is globally controlling/scaling (together with a bunch of other parameters) the PWM signal to the turbo
DB (duty bias) is doing the local scaling

In other words - if you get over/under boost in certain areas you can use DB to finetune.

...hope I got that right

pretty much! here is the link for further reading. http://www.n54tech.com/forums/showthread.php?t=29893

08-24-2015, 08:30 PM	#1
obriennathaniel @obriennathaniel_f30 on Instagram 515 Rep 1,063 Posts Drives: 582whp/596wtq '13 335i Join Date: Jan 2014 Location: Houston,Tx ig:obriennathaniel_f30 iTrader: (0)	My JB4 logs as requested, 26.7 PSI So people have been asking for awhile to see my JB4 logs, well here they are Ive been messing around with DB tuning, and I still have some work to do but here we are! this is on an E40 mix, 100% meth spray. Also I have the timing trick installed so my IAT's are showing about 40 degrees higher than reality. [IMG]Untitled by blutorrent, on Flickr[/IMG] [IMG]Untitled by blutorrent, on Flickr[/IMG] [IMG]Untitled by blutorrent, on Flickr[/IMG] http://datazap.me/u/obriennathaniel/...log=0&data=1-4 http://datazap.me/u/obriennathaniel/...log=1&data=1-4 http://datazap.me/u/obriennathaniel/...log=2&data=1-4 __________________ CG Precision VS-1 Exhaust\DR-1 DownPipe \| PS2 Turbo\Inlet \| PDU PI w/Fuel-it platinum kit & E sensor \| GFB DV+ Diverter Valve \| BM3 w/AIC2-V\|Tune CaryTheLabelGuy \| Full E85 \| ATM FMIC \| ER Chargepipe Inlet/Outlet \| AFE Intake \| BC Coilovers \| PSS 255/40-275/35 Velos Designwerks S3 two piece 19x9/19x10 \| Osram Xenarc \| LED retro \| AWRON digital AC gauge\|
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08-24-2015, 10:48 PM	#2
harkes Colonel 1078 Rep 2,358 Posts Drives: M135i, E39 M5, NSX and AE86 Join Date: Apr 2014 Location: Xiamen, China iTrader: (0)	You are overboosting quite a bit up top because your FF is too high compared to your PWM. Play with Duty Bias to get that under control. PWM not even 100% if I read it correctly - crazy haha I gotta get that Stg 2 :P __________________ M135i 8AT PWG, MHD, Pure Stage2, WMI via Torqbyte CM5-LT, Custom tuned by PureBoost (A Dane in China)
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08-25-2015, 11:40 AM	#4
Earthmaster Captain 127 Rep 851 Posts Drives: 15' M4 Austin Yellow Join Date: Sep 2014 Location: GTA iTrader: (3)	Somebody explain to me this Duty bias thing.....
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