OFT Tune Usefull Information and Tweaks

[steve99]

Originally Posted by Fizz

@steve99 with regards to cold start, how does the cam locking come into play? I thought that the VVT's stay at 0 for a short while at startup?

What @Kodename47 says is correct at idle vvt is zero at all times

i think what your asking is after a flash or ecu reset you need to start car and let it idle for about a minute to let ecu sort out the cams zero position, as if you drive off before ecu sorts itself out cams will remain at zero at all rpms. its not a big drama as on the next start if you let it idle it will sort itself out, this is only after reflash or reset though.

[Fizz]

Originally Posted by steve99

What @Kodename47 says is correct at idle vvt is zero at all times

i think what your asking is after a flash or ecu reset you need to start car and let it idle for about a minute to let ecu sort out the cams zero position, as if you drive off before ecu sorts itself out cams will remain at zero at all rpms. its not a big drama as on the next start if you let it idle it will sort itself out, this is only after reflash or reset though.

Ok so if i flashed the ECU on a stone cold engine, then start the car, the cold start function will still do its thing (i.e. retard at -15 plus high rpm)? So when this happens the AVCS will be locked at zero until the next start up?

[steve99]

Originally Posted by Fizz

Ok so if i flashed the ECU on a stone cold engine, then start the car, the cold start function will still do its thing (i.e. retard at -15 plus high rpm)? So when this happens the AVCS will be locked at zero until the next start up?

Avcs intake and exhaust is always zero at idle.

The -15 degrees is ignition timing not cam timing that what makes a lot of the noise on cold start

The only time the cams can lock at zero off idle is directly after a ecu reset or ecu flash and you dont let car idle for a minute on first startup only.

[Fizz]

Originally Posted by steve99

Avcs intake and exhaust is always zero at idle.

The -15 degrees is ignition timing not cam timing that what makes a lot of the noise on cold start

The only time the cams can lock at zero off idle is directly after a ecu reset or ecu flash and you dont let car idle for a minute on first startup only.

I was getting confused with ignition timing and cam timing....

[akahenry]

How do I disable the P050B CEL code?

Also, from the official thread of "Disabling High Rev Cold Start," I saw that another user had the same dilemma: not having the "MAF Correction After Start (In Gear)" and "MAF Correction After Start (Neutral)" in the "Mass Airflow / Engine Load" Folder. Any idea on how I can SAFELY implement this or is it even possible to implement it? Also, I'm currently running the Stage 2 UEL 91 Octane Tune (v2.066). I noticed that in your aforementioned photo about the changing the "Ignition Timing Post Start" values from -15 to -4, you're running the Stage 1 map. Does the Stage 1 Map have the "MAF Correction After Start (In Gear & Neutral" categories whereas the Stage 2 UEL don't? (Amateur Enthusiast right here by the way, bare with me)

Update: Figured out how to disable the P050B Code.

[steve99]

Originally Posted by akahenry

How do I disable the P050B CEL code?

Also, from the official thread of "Disabling High Rev Cold Start," I saw that another user had the same dilemma: not having the "MAF Correction After Start (In Gear)" and "MAF Correction After Start (Neutral)" in the "Mass Airflow / Engine Load" Folder. Any idea on how I can SAFELY implement this or is it even possible to implement it? Also, I'm currently running the Stage 2 UEL 91 Octane Tune (v2.066). I noticed that in your aforementioned photo about the changing the "Ignition Timing Post Start" values from -15 to -4, you're running the Stage 1 map. Does the Stage 1 Map have the "MAF Correction After Start (In Gear & Neutral" categories whereas the Stage 2 UEL don't? (Amateur Enthusiast right here by the way, bare with me)

Update: Figured out how to disable the P050B Code.

All the required tables are in all roms. Its just that the def supplied by the oft guys dont index or reference those tables. you have to doo what koolBRZ did and make a definition that has tose tables referenced.

[Silver Ignition]

Ambient temps are now in the 70's and I'm still having cold-soak starting issues...2 or 3 tries before it starts and runs. Anyone still having issues? Should I make the IPW changed further up the temp range?

My fuel trims are plus/minus 2-3% so it's not a fuel mix/quality issue. IAM is steady at 1. AFR's are spot-on.

Haven't logged a cold-soak start yet because I keep forgetting

[steve99]

Originally Posted by Silver Ignition

Ambient temps are now in the 70's and I'm still having cold-soak starting issues...2 or 3 tries before it starts and runs. Anyone still having issues? Should I make the IPW changed further up the temp range?

My fuel trims are plus/minus 2-3% so it's not a fuel mix/quality issue. IAM is steady at 1. AFR's are spot-on.

Haven't logged a cold-soak start yet because I keep forgetting

Try adding about 10% or 15% to the values of IPW in the cranking tables at the temps its not starting at, and probably all those below that temp as well.

[Silver Ignition]

Originally Posted by steve99

Try adding about 10% or 15% to the values of IPW in the cranking tables at the temps its not starting at, and probably all those below that temp as well.

I made the cold-start tweaks as per the other thread and they worked well, but I think his adjustments are below 50*F.
I didn't have any issues last summer...

I'm at 25k and I understand Spark Plugs are done at 30k on these so maybe it's time...

[steve99]

Originally Posted by Silver Ignition

I made the cold-start tweaks as per the other thread and they worked well, but I think his adjustments are below 50*F.
I didn't have any issues last summer...

I'm at 25k and I understand Spark Plugs are done at 30k on these so maybe it's time...

Thought plugs were 100,000 km (60k miles).

It wont be plugs causing cold start issues with ethanol , its just hard to start in cold weather if E% is over 70

I have mine starting ok down to 9C (50F) on 90% ethanol by adding 10% to ipw's in the other thread. My rom definition also has extra cranking tables up to J defined from memory so that may help as well

[Semprini]

I'm looking to adjust the Fuel_Multiplier_Display_Offset for E85 but I'm not seeing it.
Base tune = OFT 2.067 Stage 2 EL E85. Is it moved? Removed? Built in now?

[steve99]

Originally Posted by Semprini

I'm looking to adjust the Fuel_Multiplier_Display_Offset for E85 but I'm not seeing it.
Base tune = OFT 2.067 Stage 2 EL E85. Is it moved? Removed? Built in now?

It may be in a different folder in your definition, have a look in the "Alpha Brz" folder of do a text search on you definition to find it.

[Semprini]

Originally Posted by steve99

It may be in a different folder in your definition, have a look in the "Alpha Brz" folder of do a text search on you definition to find it.

There it is. They changed the name to not have underscores. Looking for just "Multiplier" pegged it right under "Alpha - BRZ". Thanks!

[steve99]

ACE and Nameless PLM header cam angle tables Normal and safe tables are same.
Note these tables will get you in the ballpark, but may require adjustments and you may need to adjust fueling and ignition timing as well to extract full benefit

Their is a second set of Nameless PLM header tables with modified midrange by @KoolBRZ called VII NH 1.4 EL see the tune tweaks thread first post for those.



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