Lean after 5500rpm

[solidsnake11]

C

[tomm.brz]

Ecutek pdf of gt86 tuning just says it is used internally by Ecu and there should be no need of adjusting

If you raised the Engine load limit, did you raise also the Mass airflow limit?

[steve99]

Ok whwn you do FI on tjese cars you need to rescale the MAF load limit AandB tables, the maf max load limit, thte maf air flow limit. And rescale a bunch of fueling timing vvt, pi\di ratio tables.


You also donrt want to run the di max pulse width past about 6.5 ms and the port injectors past about 15 ms.


You might also want to change the di max quantity allowed table to allower higher flow at higher rpm


If you dont rescale load limit ravles and !ax load and max flow rate tavles the ecu calculates the true load but it get truncated at those limits and will cause lean runnng once limits exceeded

[tomm.brz]

More than 4 of engine load and more than 500 grams of air of maf, lol
And I thought my 2.5 of load with 1 bar of boost was high..

[steve99]

Ok jad a look at the log


Id say max load is still at 4 it might need to be increased you hit 4 load at 15 psi , avout 450 g\s od air flow the air flow and boost keep increasing to 21 psi and 670 g\air flow but load stays at 4.


So looks like its hitting load limit or air flow limit


Your also very close to maxing maf sensor at 5v


Check the max load limit i think stock it 4 and mas air flow limits stock is 200 from memory

[tomm.brz]

Originally Posted by solidsnake11

Is A and B holding me at 4. I can not increase these past 4. The wrx guys were changing the load multiplier to raise their cap on the ejs
Attachment 183313

Ecutek adds a new engine load limiter table that overwrites those 2 oem tables
It s like a racerom patch so it doesn t cap at 4

That s another reason for you to upgrade to ecutek

[tomm.brz]

Unfortunately is expensive, I know well, I spent those 1000€ it costed me
But it has his advantages
Also the kit and racerom license are highly resellable

You can also put failsafe strategies, you certainly can t with tactrix
Not gonna save a weak rod to snap like in my case, but you get to save the engine if something out of your control fails

[tomm.brz]

I think it s a different logic there, but don t know.. I wouldn't know how to convert that "100%" in our tables
I just use the load comp table just to make small adjustments to the afr without modifying the maf, scaling, and the maf oat comp to make the ecu correct the afr based on charge temp (not really necessary as I use forced closed loop even when car is supposed to be in open loop state, but it makes the fuel trims similar in every ambient temperature)

If 4 of engine load is your invalicable limit, I would make the maf scaling a lot leaner than then real needed, to make engine load calculation smaller, and then make the afr richer directly from the primary open loop table and by offsetting the port injection scaling, like putting a smaller "cc" value
But seems sketchy and not sure it would work

[tomm.brz]

That table is just an enrichment of the afr target for when advance multiplier drops from 1
Like, if am goes to 0.9, the 10% of the values of that table gets added to the afr target
It is to cool the chambers when it knocks, it will be no help for your problem

Be careful with those knock correction and super lean afr at 7k rpm with 22psi of boost :/

[tomm.brz]

I m spending like 6000 euro to rebuild my engine, and for you is not a big deal to throw away a functioning engine.. But you can t spend money for ecutek? That i do not really understand

With ecutek you can hook that Wideband permanently to the ecu and even use it to command a closed loop until redline, you Don t even have to scale well the maf or set up all those odd tables like you are doing now to make it work
It can also make super simple the management of the wastegate and even of the flex sensor you ve bought

[Wayno]

Originally Posted by solidsnake11

Is A and B holding me at 4. I can not increase these past 4. The wrx guys were changing the engine load multiplier to raise their cap on the ejs
Attachment 183313

If you can't increase these past 4, you can scale the MAF Scale table so that the ECU calculates a lower load value.
Example: If you multiply the entire maf scale by 1.1, load will increase by 10%.

"Load" is a very arbitrary number, really only purpose is looking shit up in tables. No reason to go past 4, don't need that much resolution.

It's a bandaid but it's better than all the other many bandaids in tables that you've linked.

Also, if you've disabled fuel trims in open loop, you're not using the maf scale for learning trims, so who cares the scaling on it.

[tomm.brz]

Put lower cc value on PI scaling and make afr target richer

[steve99]

Originally Posted by solidsnake11

The wrx guys was doing that before they decided the engine load multiplier would work better.

I think at this point it probably worth considering ecutek. Runnong 15 plus psi boost !axing out load and close to maxing out maf . Its probably worth gping ecutek to get higher load limits without hack. A boost cut failsafe. Built in closed loop boost control ( you jist need mac valve or solenoid, no controller) . It will do throttle close or fuel cut overboost cut or both. Speed density ( hybrid with maf if needed) and flex fuel.


Yeah it more money but you could sell oft to offset cost.


Unfortunatly you will need racerom extension as well as cavle and licience

[tomm.brz]

With ecutek you set different boost also based on gear, and would be your car more usable always
You can also set an antilag if you want