Official OpenFlash Tablet FA20 Tuning Tech Discussion Thread

[Victor Draken]

Why Am I getting P0420 code if I have stg 2 EL?

[Malt]

Originally Posted by Victor Draken

Why Am I getting P0420 code if I have stg 2 EL?

Pretty sure shiv reenabled those codes so people could tell if they had exhaust leaks or not. I might be mistaken though.

[Victor Draken]

Originally Posted by Malt

Pretty sure shiv reenabled those codes so people could tell if they had exhaust leaks or not. I might be mistaken though.

I think you are right

[spdbydesign]

Vishnu OFT Tune Coming Soon for the SBD Turbo Kit!

Vishnu Tuning/ Speed By Design announce upcoming OFT (Open Flash Tablet) support for the SBD FT86 Turbo Kit!

We are so excited to partner with Vishnu, who has been a staple in the import community for numerous years.

With the sales success of the OFT Tablet, via Shiv's quality tuning, we aim to enhance the already incredible value of the SBD FT86 Turbo Kit.

Today, the development vehicle is being delivered to Vishnu and development work will begin next week.

Special thanks to Neal @EQ Tuning for the quality install on the development FRS.

http://www.ft86club.com/forums/showthread.php?t=66574

http://www.ft86club.com/forums/showthread.php?t=58514

Have a great weekend everyone, stay tuned!

Chris Riggs

[phrosty]

Originally Posted by steve99

Check AFR at WOT above 5500rpm is no leaner than about 12 (assuming your N/A) most people would say tune for 12.5 or 12.7 but these motors tend to knock any leaner at higher rpm. arroud 11.8-12 is shiv's target for N/A on petrol maybe 12.2 on E85

Assuming you've scaled your MAF and have fuel trims as low as can be, what ways are people getting these values adjusted?.

On a 3rd gear pull NA with 93 gas, I'm getting 12.5-13 above 5500 with an LTFT less than 1%. I'm working on correcting that 1% but I don't think that'll be enough to bump me to 11.8-12.

[EAGLE5]

Cool! Will there be OFT only programming or a piggyback?

Originally Posted by spdbydesign

Vishnu OFT Tune Coming Soon for the SBD Turbo Kit!

[spdbydesignchris]

The tune will be available through the download page on Vishnu's website, free of charge.

But you will need the OFT programmer, which is $499.

http://www.openflashtablet.com/produ...ads/index.html

[steve99]

Originally Posted by phrosty

Assuming you've scaled your MAF and have fuel trims as low as can be, what ways are people getting these values adjusted?.

On a 3rd gear pull NA with 93 gas, I'm getting 12.5-13 above 5500 with an LTFT less than 1%. I'm working on correcting that 1% but I don't think that'll be enough to bump me to 11.8-12.

Once your lft is around 1-2 percent your AFR should follow the values in the OL Fueling table (plus the fuel trim percent), of not then you OL maf scaling is out at the top end.

The LTFT is determined by error in closed loop. Generally your not in closed loop above about 5000rpm.

VGI's utility should sort this for you if you do about 3, 2000-7000 rpm runs and input the data.

Once ol/cl maf scaling right then you can adjust the OL fuel table to your desired AFR at the higher rpm/load

Shiv tends to run his tunes on the rich side for safety and knock resistance, you really need a dyno to see if your making/losing power with your afr changes, and do your logging to see it stays knock free high rpm

There is a little bit of knock evident by chunk out of kclearned curve between 6400-6700 looks like about -0.8

[DC2R]

Originally Posted by spdbydesign

Vishnu OFT Tune Coming Soon for the SBD Turbo Kit!

Vishnu Tuning/ Speed By Design announce upcoming OFT (Open Flash Tablet) support for the SBD FT86 Turbo Kit!

We are so excited to partner with Vishnu, who has been a staple in the import community for numerous years.

With the sales success of the OFT Tablet, via Shiv's quality tuning, we aim to enhance the already incredible value of the SBD FT86 Turbo Kit.

Today, the development vehicle is being delivered to Vishnu and development work will begin next week.

Special thanks to Neal @EQ Tuning for the quality install on the development FRS.

http://www.ft86club.com/forums/showthread.php?t=66574

http://www.ft86club.com/forums/showthread.php?t=58514

Have a great weekend everyone, stay tuned!

Chris Riggs

Awesome news! Can't believe OTS turbo tune with only the tablet !

Sent from my SM-G900T using Tapatalk

[spdbydesign]

[ame="http://vimeo.com/96965759"]Customer's first Test Drive in his new SBD Turbo Kit Powered BRZ! on Vimeo[/ame]

[phrosty]

Originally Posted by steve99

Once ol/cl maf scaling right then you can adjust the OL fuel table to your desired AFR at the higher rpm/load

Shiv tends to run his tunes on the rich side for safety and knock resistance

Is there something other than the OL fuel table affecting this?

Shiv's OTS has between 12.4-12.5 at high RPM/load in the table, which doesn't sound like the safe "rich" description I've heard people give his tune. jamesm suggests high 11's, low 12's in the same area -- that's more what I was expecting.

The stock ROM actually seems to run considerably more fuel, going as rich as 10.1.

[steve99]

Originally Posted by phrosty

Is there something other than the OL fuel table affecting this?

Shiv's OTS has between 12.4-12.5 at high RPM/load in the table, which doesn't sound like the safe "rich" description I've heard people give his tune. jamesm suggests high 11's, low 12's in the same area -- that's more what I was expecting.

The stock ROM actually seems to run considerably more fuel, going as rich as 10.1.

As far as i know ol fueling is determined by maf , ol fuel table and the stored ltft.

If your ltft is negligable and your ol maf scaling is good the commanded afr ie value in ol fuel table for that load/rpm should match the measured afr. Assuming the 02 sensor is good.

I dont know how the stocck rom could read 10.1 afr as the stock 02 scaling does not go that low, the oft guys did adjust the o2 scaling a bit to read in the 11 afr.

I also suspect that they deliberately use the top end ie the ol part of the maf scale to make their tunes run a bit rich.
As you have now scaled your maf correctly you have removed this , so if you now want to run 12.1 afr you will need to adjust the higher rpm load area of your ol fuel table from 12.4 to 12 or whatever you want to run.
As i said before this is where you rearly need a dyno to see if you afr changes make or lose power, while checking your knock free at higher rpm

also run it past @jamesm as he is a tuner and i am not :-):-)

[jamesm]

Originally Posted by steve99

As far as i know ol fueling is determined by maf , ol fuel table and the stored ltft.

If your ltft is negligable and your ol maf scaling is good the commanded afr ie value in ol fuel table for that load/rpm should match the measured afr. Assuming the 02 sensor is good.

I dont know how the stocck rom could read 10.1 afr as the stock 02 scaling does not go that low, the oft guys did adjust the o2 scaling a bit to read in the 11 afr.

I also suspect that they deliberately use the top end ie the ol part of the maf scale to make their tunes run a bit rich.
As you have now scaled your maf correctly you have removed this , so if you now want to run 12.1 afr you will need to adjust the higher rpm load area of your ol fuel table from 12.4 to 12 or whatever you want to run.
As i said before this is where you rearly need a dyno to see if you afr changes make or lose power, while checking your knock free at higher rpm

also run it past @jamesm as he is a tuner and i am not :-):-)

Open loop has nothing at all to do with any O2 sensor (aside from the high ltft bucket calculated in closed loop, if it's even enabled). The stock tune really is quite rich, but remember the map is scaled past what the stock car will ever see on the load axis (out to 1.4g/rev).

Deliberately jacking up the airflow model to achieve an AFR target would be very odd, and I can't imagine why anyone would do that.

[Td-d]

Originally Posted by jamesm

Deliberately jacking up the airflow model to achieve an AFR target would be very odd, and I can't imagine why anyone would do that.

One very specific reason to shift the entire O2 scaling around, actually, but nothing to do with open loop as mentioned.

If you want to run higher than stoich AFRs in closed loop, it is not possible within the limitation of the OEM code. 14.7 is the leanest you can reach. To achieve leaner mixtures (for fuel economy), you have to manipulate the O2 sensor scaling.