MAF Scaling - Open/Closed Loop Fueling info - Page 25 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Ondreiko · 06-29-2015, 11:11 AM

Quote:

Originally Posted by steve99

Fuel system status in logs
1= Warmup/ O2 not up to temp
2= Closed loop
4= Open loop
8= Fuel system fail/error

MAF= Mass air flow sensor
LTFT= long term fuel trim
STFT = short term fuel trim
O2 = oxygen sensor
IAT= Intake Air temperature

Steve, my OFT shows fuel system status as 1,2 and 3, where 3 seems open loop status. And there are even such numbers in fuel system status as 2.2. of 2.8 showable.
http://datazap.me/u/ondreiko/longlog...og=0&data=1-11

phrosty · 06-29-2015, 11:28 AM

Quote:

Originally Posted by Ondreiko

Steve, my OFT shows fuel system status as 1,2 and 3, where 3 seems open loop status. And there are even such numbers in fuel system status as 2.2. of 2.8 showable.
http://datazap.me/u/ondreiko/longlog...og=0&data=1-11

Datazap scrunches your numbers into a smaller set (think of making an image smaller) to improve performance, and this means if a "2" is next to a "4", they are merged into a "3" (or other numbers in between).

Wayno · 06-29-2015, 11:30 AM

Quote:

Originally Posted by phrosty

Datazap scrunches your numbers into a smaller set (think of making an image smaller) to improve performance, and this means if a "2" is next to a "4", they are merged into a "3" (or other numbers in between).

He logged inj mode, not fuel system status.

Ondreiko · 06-29-2015, 12:32 PM

Quote:

Originally Posted by Wayno

He logged inj mode, not fuel system status.

Damn, i missed that fuel status gauge...

Wayno · 07-07-2015, 03:50 AM

Thought I'd share this here.

So far I've seen the MAF sensor having one of only THREE behaviors in OL on Australian cars with stock intake.

If you wish to ignore CL and use the OTS 2.0 Stg2 petrol MAF scale, then maximizing power in the shortest time possible should simply be a matter of plugging in the correct adjusted MAF scale.

(I say shortest time possible, but this is 6 months worth of going in circles).

TYPE 1
The lucky few who have near perfect AFR's on OTS tune.
No correction required except smoothed MAF scale slightly - 1% leaner at 3.2V, 3.9V and 4.0V.

TYPE 2
Starts going rich after 4.0V MAFV or 6400-6800rpm, right before peak power so it hurts your dyno number.
Corrected with "v77.NT1" MAF scale - 1% leaner at 3.2V, 1% leaner at 3.9V, 3% leaner at 4.0V, 5% leaner after 4.2V.

TYPE 3
Farkin rich all over but extremely rich at 3.2V and after 3.8V MAFV.
Usually accompanied by engine load above 1.3g/rev resulting in a fake lean lump around 6000-6800rpm where it's hitting the load limit. It still makes decent power at 6800, purely by accident and sucks everywhere else.
Corrected with "v76.AT1/v77.AT1" MAF scale - 6% leaner at 3.2V, 4% leaner at 3.9V and 4.0V, 5% leaner at 4.3V.

TYPE 1 Examples:
(MT) 1:
http://datazap.me/u/toy-sooby/3rd-ge...2-3&zoom=0-107
(MT) 2:
http://datazap.me/u/deanveljkovic/86...2749&mark=2713
(MT) 3:
http://datazap.me/u/deanveljkovic/ky...zoom=4149-4280

TYPE 2 Examples:
(MT) 4:
http://datazap.me/u/lipton54321/log-...1060&mark=1022
(MT) 5:
http://datazap.me/u/notrq/custom-ww-...0-462&mark=423

TYPE 3 Examples:
(AT) 6:
http://datazap.me/u/praneetn7/stg-2-...zoom=5263-5359
(AT) 7:
http://datazap.me/u/wayne/206-stg2-u...&zoom=893-1084
(MT) 8:
http://datazap.me/u/ethsgreygts/wayn...&zoom=907-1082
(MT) 9:
http://datazap.me/u/supernom/e85-pul...63&mark=68-112

steve99 · 07-07-2015, 06:14 AM

+1 on that mate i was type 3 farkin rich which was why i stated messing with tune.

probably why dean made good power straaight out of the box almost +30kw on e85

Wayno · 07-07-2015, 06:53 AM

The other thing is it doesn't correspond to header type or calibration code. For example all 3 behaviors contain A01G and all 3 contain UEL and all 3 contain stock headers. So could be simply batches of sensors, batches of air boxes, or some other manufacturing variation, etc.

DocWalt · 07-07-2015, 08:45 AM

I was in the type 3 as well, in the US. My buddy's car was closer to a type 2, but he was pretty lean everywhere in part throttle which meant his IAMs were dropping below .7 a LOT.

Chimera · 07-07-2015, 10:42 PM

So, the trd intake, is it common/recommended to scale? I am looking to get one this week and am considering trying my hand at this. It would be my first toe into tuning.

nunonuna · 07-07-2015, 10:52 PM

OMG!~ LOL
I just lost a whole data log of 30+ minutes driving because of simple mistake.
While I was typing name of log on the OFT's file name creating menu, my finger touched "esc" on the screen accidentally.
Then it went back to data logging screens and NO saved data.

So everyone, do not ever press "esc" on OFT's screen keyboard when typing name of data log.
I wish Im the one and only person who experience this.

DocWalt · 07-07-2015, 11:13 PM

Quote:

Originally Posted by nunonuna

OMG!~ LOL
I just lost a whole data log of 30+ minutes driving because of simple mistake.
While I was typing name of log on the OFT's file name creating menu, my finger touched "esc" on the screen accidentally.
Then it went back to data logging screens and NO saved data.

So everyone, do not ever press "esc" on OFT's screen keyboard when typing name of data log.
I wish Im the one and only person who experience this.

I've done it too. IMO it's a design flaw. It should ask if that's really what you wanted to do...

BTW 30+ minute logs are auto trimmed somewhere around 20 minutes now, so any data after that is gone.

steve99 · 07-08-2015, 01:30 AM

Quote:

Originally Posted by Chimera

So, the trd intake, is it common/recommended to scale? I am looking to get one this week and am considering trying my hand at this. It would be my first toe into tuning.

TRD intake maf scaling will be very close to stock.

Unless you have already bought one or want the bling factor a quality drop in filter in the stock air box will likely achieve same results for far less cash.

Add a silicone intake hose if you want to delete sound tube or simply plug it up.

Chimera · 07-08-2015, 01:35 AM

Quote:

Originally Posted by steve99

TRD intake maf scaling will be very close to stock.

Unless you have already bought one or want the bling factor a quality drop in filter in the stock air box will likely achieve same results for far less cash.

Add a silicone intake hose if you want to delete sound tube or simply plug it up.

I already have the drop in, but I am getting the trd intake on a really good deal, and am kinda interested in trying something new

steve99 · 07-08-2015, 06:02 AM

Quote:

Originally Posted by Chimera

I already have the drop in, but I am getting the trd intake on a really good deal, and am kinda interested in trying something new

ok, even with stock intake you can benifit from maf scaling

07-07-2015, 03:50 AM	#341
Wayno Senior Member Join Date: Apr 2014 Drives: Toyota 86 GTS Location: Australia Posts: 1,129 Thanks: 453 Thanked 895 Times in 424 Posts Mentioned: 211 Post(s) Tagged: 0 Thread(s)	Thought I'd share this here. So far I've seen the MAF sensor having one of only THREE behaviors in OL on Australian cars with stock intake. If you wish to ignore CL and use the OTS 2.0 Stg2 petrol MAF scale, then maximizing power in the shortest time possible should simply be a matter of plugging in the correct adjusted MAF scale. (I say shortest time possible, but this is 6 months worth of going in circles). TYPE 1 The lucky few who have near perfect AFR's on OTS tune. No correction required except smoothed MAF scale slightly - 1% leaner at 3.2V, 3.9V and 4.0V. TYPE 2 Starts going rich after 4.0V MAFV or 6400-6800rpm, right before peak power so it hurts your dyno number. Corrected with "v77.NT1" MAF scale - 1% leaner at 3.2V, 1% leaner at 3.9V, 3% leaner at 4.0V, 5% leaner after 4.2V. TYPE 3 Farkin rich all over but extremely rich at 3.2V and after 3.8V MAFV. Usually accompanied by engine load above 1.3g/rev resulting in a fake lean lump around 6000-6800rpm where it's hitting the load limit. It still makes decent power at 6800, purely by accident and sucks everywhere else. Corrected with "v76.AT1/v77.AT1" MAF scale - 6% leaner at 3.2V, 4% leaner at 3.9V and 4.0V, 5% leaner at 4.3V. TYPE 1 Examples: (MT) 1: http://datazap.me/u/toy-sooby/3rd-ge...2-3&zoom=0-107 (MT) 2: http://datazap.me/u/deanveljkovic/86...2749&mark=2713 (MT) 3: http://datazap.me/u/deanveljkovic/ky...zoom=4149-4280 TYPE 2 Examples: (MT) 4: http://datazap.me/u/lipton54321/log-...1060&mark=1022 (MT) 5: http://datazap.me/u/notrq/custom-ww-...0-462&mark=423 TYPE 3 Examples: (AT) 6: http://datazap.me/u/praneetn7/stg-2-...zoom=5263-5359 (AT) 7: http://datazap.me/u/wayne/206-stg2-u...&zoom=893-1084 (MT) 8: http://datazap.me/u/ethsgreygts/wayn...&zoom=907-1082 (MT) 9: http://datazap.me/u/supernom/e85-pul...63&mark=68-112 __________________ rom downloads, information and examples Toyota 86 GTS OFT - Guide To Dialling In OTS Base Tune OFT - Example Alternate Maps for AT, 98RON, E85, MAF Scales

07-07-2015, 06:53 AM	#343
Wayno Senior Member Join Date: Apr 2014 Drives: Toyota 86 GTS Location: Australia Posts: 1,129 Thanks: 453 Thanked 895 Times in 424 Posts Mentioned: 211 Post(s) Tagged: 0 Thread(s)	The other thing is it doesn't correspond to header type or calibration code. For example all 3 behaviors contain A01G and all 3 contain UEL and all 3 contain stock headers. So could be simply batches of sensors, batches of air boxes, or some other manufacturing variation, etc. __________________ rom downloads, information and examples Toyota 86 GTS OFT - Guide To Dialling In OTS Base Tune OFT - Example Alternate Maps for AT, 98RON, E85, MAF Scales

07-07-2015, 10:42 PM	#345
Chimera Senior Member Join Date: Dec 2013 Drives: FRS Location: Atlanta Posts: 1,181 Thanks: 575 Thanked 291 Times in 216 Posts Mentioned: 17 Post(s) Tagged: 1 Thread(s)	So, the trd intake, is it common/recommended to scale? I am looking to get one this week and am considering trying my hand at this. It would be my first toe into tuning. __________________ Car Journal: http://www.ft86club.com/forums/showthread.php?p=1513783

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07-07-2015, 06:14 AM	#342
steve99 Banned Join Date: Dec 2013 Drives: FT86 Location: Australia Posts: 7,998 Thanks: 1,035 Thanked 4,987 Times in 2,981 Posts Mentioned: 598 Post(s) Tagged: 2 Thread(s)	+1 on that mate i was type 3 farkin rich which was why i stated messing with tune. probably why dean made good power straaight out of the box almost +30kw on e85

07-07-2015, 08:45 AM	#344
DocWalt Senior Member Join Date: Oct 2013 Drives: '22 BRZ Location: PA Posts: 1,833 Thanks: 2,299 Thanked 1,472 Times in 767 Posts Mentioned: 24 Post(s) Tagged: 2 Thread(s)	I was in the type 3 as well, in the US. My buddy's car was closer to a type 2, but he was pretty lean everywhere in part throttle which meant his IAMs were dropping below .7 a LOT.

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