OFT Tune Usefull Information and Tweaks

[steve99]

OFT Tune Tweeks and Information

OFT Tunes are good and you don’t really need to change anything in the standard tunes offered. But for those who like to fiddle and tweak and maybe make thing run slightly better here are some tweaks you can do.

Trying to collate all the good info in one place


Disclaimer : This is not Official release OFT information .As always this information is provided in good faith but I take no responsibility for problems or issues arising from the use on this information. I do not guarantee the accuracy of this information. Many on this forum have contributed to the information contained below it is not all my work.

If you are editing an OFT Tune ALWAYS use the Romraider Definitions provided by the OFT guys on the OFT downloads site ,and you need to use the definitions for your specific ROM type and OFT Tune version. Definitions for V1.5 and V2 OFT tunes are different.
DO NOT use Romraider Definitions from the Github site to edit OFT tunes they are different to the definition on the OFT site.


www.openflashtablet.com



Basic Tune Infomation

See the “Release Notes” text file that comes with tune files for further info

Stage 1 Tunes for Stock cars
Stage 2 tunes for Cars with Catless headers
For catted headers run the Stage 1 tune to be safe. You could try the Stage 2 tune if you log your AFR/Fuel trims and Knock and see how it looks.
EL = Equal length Header
UEL = Un-Equal length Header
91 Tunes for 91 octane (USA) fuels
93 Tunes for 93 octane (USA) fuels or higher
European and Australian tunes only released in single 91 tune rating due 98 RON fuel not being as knock resistant as USA 93 AKI rated fuel. Even 100RON fuel in Australia is not as good as USA 93 AKI ((R+M)/2) fuel.

E85 Tunes for E85 fuels only ie 60 to 90 % ethanol fuels.



E85 on stock car
http://www.ft86club.com/forums/showthread.php?t=67310



Correcting In dash fuel economy readout when on E85

On OFT tunes the in dash fuel economy display will read 25-30% off on E85,to correct this adjust the Fuel_Multiplier_Display_Offset Table as per below (original values with 30% added) you may need to adjust this percentage slightly if you find the readout is still differs from actual

Note in your Definition the "Fuel Multiplier Display Offset" Table may be under the "BRZ ALPHA" folder





TIPS on Editing your tunes with RomRaider
http://www.ft86club.com/forums/showthread.php?t=79152

E85 Cold Start Injector Pulse Width mods

http://www.ft86club.com/forums/showp...1&postcount=40



High Rev Cold Start noise reduction

Noisy high rev cold start is to warm up Cataylic converters for emissions purposes
http://www.ft86club.com/forums/showp...6&postcount=17


Three things happen Idle is increased to 1700rpm
Additional Fuel is added by offsetting MAF scale during warm-up
Ignition Timing is retarded by 15 degrees during warm-up

The retarded timing is what makes most of the additional noise.
You may get CEL code P050B if so just disable it its due to ecu monitoring post start ignition timing.

To fix alter the “Ignition Timing Post Start” table under “Ignition Timing- Advance” folder .
Change all cells from -15 to -4 degrees and most of the noisy “bark” should be gone.


see here and image below
http://www.ft86club.com/forums/showt...=55676&page=11




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You can also reduce the “Idle control” “Idle control Target A” and “Idle control Target E” tables reduce the values for idle that are over 1400 rpm to 1400 rpm. or even 1200 rpm if you like

The MAF adjustments can also be scaled back but those tables not in OFT definitions yet

Don’t get to aggressive with your adjustments else your car may not idle well in very cold weather startup and you may also trigger a CEL code related to cat warmup.

Whole thread on it here.
http://www.ft86club.com/forums/showt...rev+cold+start



Knock Correction – General information and for Australian/European fuels
Do this at average temps in your area then correct for high or abnormal temps see below.
http://www.ft86club.com/forums/showthread.php?t=61820

Knock Correction for 91 Octane USA fuels
http://www.ft86club.com/forums/showt...47#post2216047

Kodename47 Knock correction tool
http://www.ft86club.com/forums/showthread.php?t=74890


High Ambient temperature Related Knock

Adjust IAT (intake air temp) ignition timing retard table to cut in a bit earlier and make activation table more aggressive.

Note -100% in the activation table means no retard applied and 0% means full retard applied as per the IAT vs Ignition timing table.




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Add some ignition retard to the Engine Coolant Temp vs Ignition retard Table.A & B
Suggest -2 degrees retard at 212F and -3 degrees at 230 (this is what WRX ECU runs), stock/OFT tune ECT/retard tables A & B have no retard at high coolant temperatures. Hopefully adding this will reduce any high temp induced knock and also reduce power so you know something is going wrong. Hopefully the ECU would go into limp home mode at very high coolant temps.

See thread here

http://www.ft86club.com/forums/showthread.php?t=73660



Crawford Billet Power Block BPB Tune Changes for OFT Tunes

see thread here
http://www.ft86club.com/forums/showt...=BPB+Openflash

Adjusting/Activating Launch control and Flat Foot (no lift) Shift parameters

http://www.ft86club.com/forums/showt...launch+control (Only for Manual vehicles)Note : OFT ROM's have a special patch for these functions use the definition files from the www.openflashtablet.com website downloads page

Launch Control -LC
Basically a second RPM limiter that is active when the vehicle speed is below the threshold speed set regardless of clutch in/out.
Launch control Disable speed = speed at which Launch RPM is disabled (ie you revert to normal red-line RPM limit 7600) default = 6mph (aprox 10KmH)
Launch Control RPM Delta = Amount to subtract from your Red-line RPM to get you Launch RPM e.g. if LC RPM Delta = 3600 your Launch RPM will be 7600-3600 = 4000 RPM

To disable Launch Control set LC RPM Delta = 0

Flat Foot (no lift) Shift -FFS
Is Another RPM limit activated when the Clutch is depressed (it does not monitor that the throttle is flat or 100%) for this reason it can activate on downshift.
Flat Foot Shift RPM Delta = Amount to subtract from your Normal Red-line RPM to get FFS RPM limit eg if you set FFS Delta = 2000 your FFS RPM limit will be 7600-2000= 5600 RPM so when up-shifting with foot on accelerator RPM will be limited to 5600 RPM as soon as you depress clutch even though your foot is on accelerator. Note its does not need the accelerator/throttle to be 100% or flat to activate its activated of Clutch switch only. This can sometimes cause issues on downshifts if you set the RPM to low for Flat foot shift.

To disable FFS set Delta to 0 (zero) in the table FFS RPM Delta using Romraider

Adding the SOFT rev limit to Automatic ROMS
OFT roms already have this for manual roms

Copy the BASE TIMING B (under Ignition timing advance folder in romraider) table and the REV LIMIT FUEL CUT table under miscellaneous limits folder the from the corresponding Manual ROM into your Automatic rom for European/Aussies this would be from the A01G rom to the A01I rom.
@Wayno found that there are two versions of the soft rev limit one has -14 in the 7600 row in Base_Timing_B and the other has -0.12 in the 7600 RPM row, shiv said pick the one that suits you best. -14.88 is in stage1 tune and -0.12 is in Stage2 tunes
also note the second last ROW the RPM value on the axis is changed to 7450 RPM.


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Adjusting DBW (drive by wire ) throttle tables
Note these tables are complex in their interaction and you may produce unwanted or undesirable results.

Read this thread first by @mad_sb
http://www.ft86club.com/forums/showthread.php?t=28453

see thread for autos
http://www.ft86club.com/forums/showthread.php?t=80600


@Wayno has used the "requested Torque B" DBW table from the manual roms in auto roms with good results






MAF Scaling
MAF Scaling on new V2xx tunes is quite good, if you have an aftermarket intake or just want to get everything really spot on and smooth you can scale the mAF sensor to suit your car and mods .
http://www.ft86club.com/forums/showthread.php?t=64790


Basic Log Your Tune Info
What to look for in the logs
http://www.ft86club.com/forums/showt...01#post1842501

Kodename47,s Tuning Tool Thread
http://www.ft86club.com/forums/showthread.php?t=75710


Adjusting Radiator FAN Temps settings
Whole thread on subject
http://www.ft86club.com/forums/showthread.php?t=64731

Good info here
http://www.ft86club.com/forums/showp...7&postcount=15

Tuning for pops/backfires ect (not my thing but ...)
http://www.ft86club.com/forums/showthread.php?t=61069


Intake and Exhaust VVT CAM tables for JDL UEL catless headers.

http://www.ft86club.com/forums/showp...3&postcount=10

Safe and Normal Tables are same


Intake and Exhaust VVT CAM tables for NAMELESS or PLM long tube catless headers.

Safe and Normal Tables are same , These will get you in the ballpark but other adjustments may be required to extract max benefit like fueling and ignition timing

Intake and Exhaust VVT CAM tables for NAMELESS or PLM long tube catless headers (Version 2)
Here is modified cam table set for Nameless/PLM headers if you notice a hesitation in the 3000-4000 rpm area modified by @KoolBRZ







Intake and Exhaust VVT CAM tables for ACE long tube catless headers.

Safe and Normal Tables are same , These will get you in the ballpark but other adjustments may be required to extract max benefit like fueling and ignition timing.








Possible Idle dip and hesitation fix (note try scaling maf first)
@ztan came up with possible fix to idle dips and hesitation off idle

http://www.ft86club.com/forums/showp...6&postcount=21

set all 3 PI/DI ratio tables to have full DI up to 0.3 g/rev load (see figure)
If you have stock injectors probably just up to 0.2g/rev will do.



see also info on PI/DI here
http://www.ft86club.com/forums/showt...72#post1886972

Great info here
http://www.ft86club.com/forums/showp...2&postcount=17

From @moto-mike
"I have grown to LOVE the split DI/PI system on this car. It is more work--yes, but in practice it works incredibly well. Out of all the things we can tweak on this car to make power, the DI/PI ratios and timings are the least touched. The engineers knew what they were doing here, and any tuner who actually spent time trying out the different variations empirically, will be using something very similar to OEM.

The reality here is that DI works BEST by injecting in a very narrow window, just as @arghx7 outlined. Too early and you're blowing out the exhaust, too late and you're still injecting when the combustion event goes off. Another factor is that you don't want to inject too far away from the spark, that's why it isn't just 370 across the board.

We've seen some tuners swear by DI only, and others use 50/50 split or even full on PI in really high HP applications. I don't think either one is a good solution.

Think of it this way: DI fuel delivery will always be the optimal method, UNTIL you make the mixture too unstable or wash the cylinders. Wash is unlikely, but once you approach 7ms injection times (250+whp with e85) you begin to lose some of that benefit. The mixture becomes less stable. Between about 300whp you cross over the threshold where 35% PI has no negative effect. 20% PI on OEM tunes? We have found absolutely no repeatable HP gains, as in 0, like none-what-so-ever. Despite changes in timing, leaner or richer, more or less aggressive cam timing, or different injection timings...I think one car actually made 1hp over 20% PI mix...which is within the margin of error between runs.

So in reality, there's just no reason to overstress the DI system with long IPWs. Take advantage of the dual injection, max out the DI to about 6 ms (this way in sub freezing temperatures you have headroom) and then run port at no more than 80% duty cycle, or about 15ms.

Also, as a comparison the DI equipped FA20 in the 15 WRX...we can't run half the timing on those! DI only we hit the knock threshold at a much lower HP using DI only. Can't explain it and it's still a very new system, but it made me wish for the BRZ setup having tuned it. "



Tweak to smooth low down Throttle response - alter the tip-in enrichment tables

The standard tip-in doe not activate till 1.5% throttle delta AND the minium tip-in pulse width of 2.4ms is exceeded this means no tip-in till aprox 8% throttle delta. Changing the minium pulse width activation to 1.5ms and a tweak to the enrichment tables will get the tip-in started at about 4% throttle delta. Smooths out low end throttle response and takeoff.







Bogging or Hesitation at Low RPM HIGH Load (ie full or large throttle application below 2000rpm)

Try leaning out the OL Fuel Table in the Low RPM High Load area as per below Blue highlighted area for petrol tunes lean same area by similar amount

Shiv's post below for full info
http://www.ft86club.com/forums/showp...3&postcount=27





Load Limits

If you getting any weird cuts in power at high loads or sustained high speed runs or strange rich/lean areas it may be load limits.

Load limits:

ON OFT C & D series rOMS the load limit tables B&C (some defs it will be A&B) are set to about 1.5 accross entire rpm range. This can cause bogging or hesitation. Either copy @Wayno's load tables or copy back the standard load limits from say a G or I series OFT rom.

There are 4 load limits that may need to be altered:

MAF maximum (in g/s)
Engine load Max (in g/rev)
Engine load limiter A and B (g/rev per RPM)
@Wayno has done some work on the E85 Automatic Transmission tunes which appear to push the "engine Load limite A & B beyond 1.3 causing issues see posts below load limits increased to 1.4
http://www.ft86club.com/forums/showp...postcount=2510
http://www.ft86club.com/forums/showt...46468&page=114




Rescaling the Stock Front 02 (oxygen) sensor to read richer for boosted cars
@ztan has used an aftermarket wideband sensor to recalibrate the stock (standard) front 02 sensor readings

see full post here http://www.ft86club.com/forums/showthread.php?t=82875











My Throttle Pedal has dead spot - car sluggish after Flashing Tune

To minimize any issues and speed up learning after a Flash or Reset

• Turn ignition fully off after a flash or reset
• Turn ignition fully ON, do not start car, do not touch throttle, leave for 20 sec this will allow ECU to perform its diagnostics and calibrations on cam position and throttle position sensors
• Turn off ignition
• Turn on ignition leave for 20 sec then start car do not touch throttle
• Let car idle for at least a minute and wait till it settles at the normal idle of about 750 RPM, again do not touch throttle.
• After normal idle is achieved then drive car.

Fuel Trim Learning
To speed up learning of fuel trims you will need to drive smoothly. The ECU only learns fuel trims in “Closed loop “ mode this is during slow or steady throttle movements and cruise and idle. When your driving aggressively on/off throttle and wide open throttle the ECU is in “open loop” fueling mode and does not learn fuel trims, it just applies the fuel trims learned in “closed loop” fueling mode. If the ECU has not had enough learning time in closed loop it will apply incorrect fuel trims and car may feel sluggish or hesitant till it learns.

Further info
http://www.ft86club.com/forums/showthread.php?t=68328



OFT TIPS and Tricks and install Thread
http://www.ft86club.com/forums/showthread.php?t=71157


E85 economy increased, power same and Petrol tunes A01G/A01I
@Wayno has made up some A01G A01I ie European/Australian/South Africia pre 2014 auto/man roms with most of these tweaks installed and some of his own here see below, his E85 tunes have been track tested
http://www.ft86club.com/forums/showthread.php?t=83945





Any addition tweaks you have post them up and I will add them in here


Soft RPM Limit Tables below

[steve99]

Added Launch control and Flat foot shift adjustment info.
tips for reducing throttle pedal lag after flash

[tech86]

Wouldn't happen to have a tweak to disable the E-LSD thing Steve? Be nice if we could disable it in the ECU and not do that stupid pedal dance at the track but probably asking too much!

[steve99]

Originally Posted by tech86

Wouldn't happen to have a tweak to disable the E-LSD thing Steve? Be nice if we could disable it in the ECU and not do that stupid pedal dance at the track but probably asking too much!

im pretty sure the traction control e-diff is not in ecu its engine only , most likely in sepatate computer body contol most likely. so unfortunatly its pedal dance althoug i think someone makes a module to do the pedal dance routine but dont know where i saw it.

[troek]

Originally Posted by steve99

im pretty sure the traction control e-diff is not in ecu its engine only , most likely in sepatate computer body contol most likely. so unfortunatly its pedal dance althoug i think someone makes a module to do the pedal dance routine but dont know where i saw it.

buddy club makes one, and one other company i forgot who. theyre several hundred dollars over here.

[phrosty]

Suggest adding how to alter rev limit behavior on AT roms to match that of MT roms. bouncing off the limiter is bad times

[themajesticone]

@steve99 I am running a catless front pipe, but I am on stock header and stock overpipe. I can still run stage 2 safely correct, since technically I am running a single cat? Currently I am running Stage 2 E85 on the new B series maps.

[phrosty]

Originally Posted by themajesticone

@steve99 I am running a catless front pipe, but I am on stock header and stock overpipe. I can still run stage 2 safely correct, since technically I am running a single cat? Currently I am running Stage 2 E85 on the new B series maps.

Stage 2 E85 is what gets recommended for a stock car running E85. So it must be safe.

[steve99]

Originally Posted by themajesticone

@steve99 I am running a catless front pipe, but I am on stock header and stock overpipe. I can still run stage 2 safely correct, since technically I am running a single cat? Currently I am running Stage 2 E85 on the new B series maps.

When on petrol Stage 1 tune is the safe one with stock header and catles front pipe.

If you try stage 2 tune log for knock and AFR as the stage 2tune runs more timing advance and more fuel.

On E85 you run the Stage 2 EL header tune for cars with stock header or aftermarket catless header again always worth logging to see if you have knock problems (unlikely on E85) and check your AFR.

[steve99]

Originally Posted by phrosty

Suggest adding how to alter rev limit behavior on AT roms to match that of MT roms. bouncing off the limiter is bad times

done

[steve99]

@Wayno found some further info on soft rpm limit added to original post

[steve99]

Added JDL UEL catless header VVT intake/exhaust cam timing to first post

[mid_life_crisis]

I'm about to install a muffler delete. An independent test by a magazine showed significant gains in the extreme upper rpms with this mod. I'm thinking it might be worth bumping up the redline slightly to take max advantage of this. Any guidelines on doing that and how high is considered safe on the stock valvetrain? I'm thinking a couple of hundred rpms should be enough so likely no big deal but I don't want to take any chances.

[phrosty]

Originally Posted by mid_life_crisis

I'm about to install a muffler delete. An independent test by a magazine showed significant gains in the extreme upper rpms with this mod. I'm thinking it might be worth bumping up the redline slightly to take max advantage of this. Any guidelines on doing that and how high is considered safe on the stock valvetrain? I'm thinking a couple of hundred rpms should be enough so likely no big deal but I don't want to take any chances.

OpenFlash OTS bumps up redline on MT but not AT. Shiv mentioned a while ago that the AT has some issues shifting with even a small increase.