M3.3.1 413

Discuss Bosch (Porsche, BMW, Volvo, etc) tuning topics here. Request definitions, discuss parameters, etc.

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Triangulé
Posts: 31
Joined: Wed Jun 06, 2018 10:34 am

Re: M3.3.1 413

Post by Triangulé » Wed May 15, 2019 10:46 am

congratulation JAS and thanks for the numbers you share with us.

Can you let me know what kind of AFR you are targetting for WOT ?
At our side the engine was runing good at 12 for low boost (0.35 to 0.45 b) and request more than 11 to 10 with now 0.8 bars.

Witch revision of AUTOCOM do you use ?
We have the old round 20 pins diag plug, it's hard to find a software that didn't need a serial adaptator, we need to change our software.
I have inpa, that is running good on my M54b30 but not helpfull for the M50.

Now your car is running good.
You need to check the injector duty cycle to see how do you use your injectors, and where you are located on the scale of their limits.
Next step will be to avoid air leak on the inlet, step by step they will appear :)

thanks Olafu again and again :)
Your bless :)

I will cut my MAF maps in 2 smaller one to check that again.

JAS
Posts: 15
Joined: Tue Apr 23, 2019 9:13 pm

Re: M3.3.1 413

Post by JAS » Wed May 15, 2019 11:28 am

You´re right,TunerPro can´t trace maf above 2,44V
I traced it with Autocom instead.

I haven´t rescale anything but K-value.My calculated K-value should be around 0,36 but this makes low values on Load,so my solution was to set K-value 0,75 so load is peaking about 9,6,this gives me the whole maptable for Load to work with.Works fine.

I have tried to replace bleedingvalve with a solid plug for oilpressure in the tranny,it shifted hard as hell with a minimum with slip!!But it also shifts hard as hell when slowing down and shifting at cruisingspeed,no good allround solution...
It shifts pretty good when car is cold with bleedingvalve instead of plug.

Problemm is only present when shifting upp or down to third gear,it freerevs before gear is engaged.

if I could adjust oilpressure by software it will be the solution,adjust oilpressure load-depending.

JAS
Posts: 15
Joined: Tue Apr 23, 2019 9:13 pm

Re: M3.3.1 413

Post by JAS » Fri May 17, 2019 1:07 am

Autocom R15.3 works fine with old cars such e36.

AFR is 12-12,5 at WOT,if it drops under 12 I´m loosing power,also pay attention due to much fuel,oil inside cylinderwalls is washed away.

Found out that problem with A/T Tranny is a common problem,there is a "2-3 Flare correction kit" to buy,it´s probably going to solve my problem.So cool with A/T,when shifting the boost is rock steady!No drop of all!

Is it possible to check injector duty in TunerPro?

Triangulé
Posts: 31
Joined: Wed Jun 06, 2018 10:34 am

Re: M3.3.1 413

Post by Triangulé » Fri May 17, 2019 7:49 am

i don't think you can check the duty cycle % in tunerpro.
You have to take the scope or even a good multimeter than can make the measurement of frequency and dutycycle.
Some automotive multimeter can do it, anyway digital scope are really abordable nowadays.

thanks for sharing your results

JAS
Posts: 15
Joined: Tue Apr 23, 2019 9:13 pm

Re: M3.3.1 413

Post by JAS » Sat May 18, 2019 12:31 pm

There is a scope called picoscope you can use on a laptop,don´t know what the cost just know we used them in a former jobb Ihad 10 years ago.
Anyway,I´m giving up petrol now...10,5:1 compratio and boosted engine is not performing well,it still keeps knocking,not much but enough...
Going to try E85 etanol,better fuel for boosted applications.
Will let you know the result!

Do not belive what they say about alcohol,I´m sure alcohol will solve all my problems :twisted:

Triangulé
Posts: 31
Joined: Wed Jun 06, 2018 10:34 am

Re: M3.3.1 413

Post by Triangulé » Sun May 19, 2019 12:33 am

there's some alternative with the chineses DSO series.
As all moderne engine have electronics sensors, a portable scope is a good investment.
even to repair or found the speed frequency signal, check ECU. it's a must tool to have.
I have an Hantek 1060, it's small enough to bring it in the car during the drive tests.

10.5 CR is too much for 0.8 bars.
You should reduce a little bit the pressure or as you said go to Ethanol.

We also have the plan to switch to E85, because it's cheaper for a track day use.
currently with the full tank we are able to do around 120km and no more ...

JAS
Posts: 15
Joined: Tue Apr 23, 2019 9:13 pm

Re: M3.3.1 413

Post by JAS » Sun May 19, 2019 12:43 am

E85 is not cheaper to run,it´s only cheaper per liter but car wants about 30-40% more fuel...But cheaper peroformance,my friend told me that they are pulling about 20% more horsepower&Torque on E85 vs gasoline.Also lots easier to map...

JAS
Posts: 15
Joined: Tue Apr 23, 2019 9:13 pm

Re: M3.3.1 413

Post by JAS » Sun May 19, 2019 10:54 am

Been tuning&running today.
With E85 you can advance ignition a lot!Peaking around 24degrees 5-6krpm in WOT-maps now.
It requires a lot more of fuel to reach AFR11,5-12.

Car pulls fantastic now,no hesitate just pulls down to rpm-limit,massive torque from 3k rpm and above.

Have to run with Lambda-adaption off,otherwise it leans out.

Do anybody know if it´s possible to turn off adation above 2krpm?

olafu
Posts: 136
Joined: Tue Jul 26, 2016 12:35 pm
Location: Finland

Re: M3.3.1 413

Post by olafu » Sun May 19, 2019 1:41 pm

6x1 map in 0xE35C (0xE364-E369) is lambda control switch off load limits. It follows RPM and if actual load is higher than map value, closed loop will be switched off. If you have been adjust K-value, that is one of many maps what must be rescaled. 0xE36A, 0xE378 and 0xE382 are also called lambda switch off maps, but i'm never tried to adjust any of those four maps.

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