Official OpenFlash Tablet FA20 Tuning Tech Discussion Thread

[Kodename47]

Originally Posted by Wayno

Hey mate, I went around in circles for months changing that fueling additive table, until I read Td-d's description in the definition which states it's only active when IAM < 1.

I did not know that. The description in my def just states this:
This is the compensation to the open loop base fueling target based on load and engine speed. Other compensations (some undefined), are also applied.

Do you know whether it is blanket applied for IAM < 1 or increases, with a hidden multiplier perhaps, as IAM decreases?

@Td-d

[Wayno]

Originally Posted by Kodename47

I did not know that. The description in my def just states this:
This is the compensation to the open loop base fueling target based on load and engine speed. Other compensations (some undefined), are also applied.

Do you know whether it is blanket applied for IAM < 1 or increases, with a hidden multiplier perhaps, as IAM decreases?

@Td-d

Ah, that's because the description is on the Primary Open Loop Fueling Base table

<description>This fuel map is used in open loop when the ignition advance multiplier (IAM) is equal to 1.0. When the IAM is less than 1.0, this fuel map is used as a base and the 'Primary Open Loop Fueling Additive' enrichment map is added to determine the final primary open loop fueling. An estimated AFR for this final fueling can be calculated as follows: 14.7/(((14.7/(Base AFR map value)) + (Additive map value * (1.0 - current IAM))). For example, if the 'Primary Open Loop Fueling Base' calls for an effective AFR of 10.5:1 and the 'Primary Open Loop Fueling Additive' map calls for 0.10 enrichment offset compensation and the current IAM is 0.75, then the final primary ol fueling would have an estimated AFR of 10.3:1.</description>


But yeah, I was adding to that sucker for months and my AFR would still spike at the location I thought I was adding fuel.

[Kodename47]

Originally Posted by steve99

guess would be its like base timing tables A safe mode B normal

There are a few tables that have A and B. I doubt it's a normal and safe type. From what others have said it may be that they are independently looked at during different routines, or even both are used similar to the closed loop fueling tables. Similar to the fact there is multiple MAP sensor scaling. My general consensus would be to just make sure they are the same.

[steve99]

Originally Posted by Kodename47

There are a few tables that have A and B. I doubt it's a normal and safe type. From what others have said it may be that they are independently looked at during different routines, or even both are used similar to the closed loop fueling tables. Similar to the fact there is multiple MAP sensor scaling. My general consensus would be to just make sure they are the same.

quite possible ,agree if they are both the same originally then keep them both the same is safest option

[Wayno]

Made some more progress, of sorts.

Before:
http://datazap.me/u/wayne/206-stg2-u...1023-1039-1063

After:
http://datazap.me/u/wayne/v63-2-pull...3103-3129-3028

It's not spiking lean between 2400-3000 after the high load, instead going rich.
Instead of adjusting the maf @2.97V which will effect CL and OL at light throttle, I think I'll set the load limiter to 1.15 or so and see if it leans it up.

Also getting this weird rpm drop a second after WOT sometimes which could be due to the low timing in the high load cells.

http://datazap.me/u/wayne/v63-2-pull...54-681-700-721

I might try to fix the high load at low rpm by adjusting the throttle instead so prevent all this from happening all together. Or rescale the Load limit tables so the last cell is 4000 rpm instead of 3200.

[Wayno]

I re-scaled the load limit tables and made them my total bitch!

Ignore the lean AFR, it's with literally 10min of learning time.

Before:
http://datazap.me/u/wayne/206-stg2-u...zoom=1225-1433

After:
http://datazap.me/u/wayne/v64-1?log=...zoom=4459-4716

Just need to extend the 1.10 limit closer to 4000 I think.

[Wayno]

Should do the trick.

[ztan]

v65?
After 3 in the morning?
Respect.

Let us know how this goes. My suspicion is when the torque converter is engaging initially, there is a bit of slippage that leads to erratic, erroneous load values being sent to the ECU and taking the engine rich.

[steve99]

@phrosty you might want to have a look at what @Wayno is doing here (few posts above) with load limits ect might help with your rpm dip issue with auto transmissions on E85

[Wayno]

Originally Posted by steve99

@phrosty you might want to have a look at what @Wayno is doing here (few posts above) with load limits ect might help with your rpm dip issue with auto transmissions on E85

I haven't fully tested these yet, but they are a bare minimum for all AT's running the OFT tune as I haven't ever seen one that doesn't have these issues. It's pretty obvious openflash never had an AT with E85 on a dyno.

The load limiter is different between petrol and E85, though I won't have a chance to test the petrol one, I'm confident it will be an improvement between 3000-4000rpm.

Also, because of this, my OL MAF scale now more closely matches the likes of @steve99's MT scale, which is a great indicator.

3.20V = 66 (-6.00%)
3.44V = 86.5 (-0.94%)
3.71V = 110.80 (-1.57%)
3.91V = 130.44 (-3.20%)
4.06V = 148.68 (-3.20%)
4.30V = 177.80 (-3.20%)
4.49V = 206.87 (-3.20%)
4.73V = 246.00 (-3.20%)
5.00V = 304.80 (-3.20%)

The CL portion is the Stg2 petrol scale.

[D_Thissen]

Just picked up my OFT today. I flashed the car in the driveway and had a quick question. Are there preloaded Stg 1 91 and 93 tunes on the tablet? Or do I have to use OFM to load those onto the tablet?

[steve99]

Originally Posted by D_Thissen

Just picked up my OFT today. I flashed the car in the driveway and had a quick question. Are there preloaded Stg 1 91 and 93 tunes on the tablet? Or do I have to use OFM to load those onto the tablet?

pretty sure the preloaed stuff is 93 tunes.

to be certian just load up the required v2.06x tunes via ofm

[D_Thissen]

Originally Posted by steve99

pretty sure the preloaed stuff is 93 tunes.

to be certian just load up the required v2.06x tunes via ofm

Thanks Steve. Just did that but in step 2, they both have the same name once you select them in ofm. I think they both say "Stage1AO1C.bin'

Sorry for my newbness

[steve99]

Originally Posted by D_Thissen

Thanks Steve. Just did that but in step 2, they both have the same name once you select them in ofm. I think they both say "Stage1AO1C.bin'

Sorry for my newbness

They will be in different folders from memory