[thejeremyman9]

Originally Posted by harkes

A thing I never understood is why it is only necessary to update the CP TMAP to 3.5 bar... To calc throttle closure would it not be comparing readings from CP and manifold TMAP?

Me either really, but i think its just enough to get by when you are tuning for WOT, since you can safely assume CP=MAP boost at 100% throttle opening. But i do feel like it leaves a gap in the data that would be very useful to have.

[harkes]

Originally Posted by kfardan

Yeah, no idea . How much boost are you currently running? I know PWG might be different but still interesting to see how MHD compares to bootmod3 in this regard.

https://datazap.me/u/harkes/fabian-v...3-4-5-12-17-33

[harkes]

Originally Posted by thejeremyman9

Me either really, but i think its just enough to get by when you are tuning for WOT, since you can safely assume CP=MAP boost at 100% throttle opening. But i do feel like it leaves a gap in the data that would be very useful to have.

Especially at WOT you would have to know how much throttle angle is needed in case of over boosting.

[kfardan]

Originally Posted by harkes

https://datazap.me/u/harkes/fabian-v...3-4-5-12-17-33

Isn't the boost a bit low for PS2 turbo upgrade?

[thejeremyman9]

Originally Posted by harkes

Especially at WOT you would have to know how much throttle angle is needed in case of over boosting.

Well yeah the other problem is that the log doesnt even show the actual boost target over 22.5psi. But i guess the tuner knows what they put in the tune.

[harkes]

Originally Posted by kfardan

Isn't the boost a bit low for PS2 turbo upgrade?

Car will run around 20psi in summer time with 35 degree C. Stock HPFP 98RON and meth. This is a far as Fabian want to push it and I already had one PS2 die on me so I am happy with a reliable tune. Netting ~11 timing like this.

Log from August last year:
https://datazap.me/u/harkes/fabian-v...ta=3-5-9-17-21

[cookiesowns]

Originally Posted by kfardan

Yes my tuner asked me to do the same and I have sent him the new logs .. hopefully, he can figure things out.



You have a very nice setup!.
I think I did contact BendCalibration about 1 year ago but they were super busy at that time and did not want to take the project. Do they offer remote tuning?

If I give up on bootmod3 I might consider switching to ECUtek.



I have 3.5bar TMAP Sensor but only on Pre-Throttle/CP.

Did you upgrade both Pre-Throttle TMAP Sensor and Manifold TMAP Sensor?

There's not much of a use for doing 3.5bar in manifold, as in order to take advantage of it, you'd have to retrain the neural models for the airflow calculations which NO ONE to date has done yet. ( take a look at Dodge/GM w/ HP Tuners and the progress they're making there )

A tune done properly can make do without the neural model changes, and run 3.5TMAP in charge pipe and regular 2.5 in mani just fine. You just need to know how the airflow model in the dme works.

Yes the issue in OP is due to not logging the RAM parameters for boost target, i believe BM3 now has this. This is why is important to pick a tuner that has done not just a variety of cars on and off dyno, but also those that are intimately familiar with BMW technical functions, and the inner workings of the bosch MED17 + BMW changes on the MEVD17.

[kfardan]

Originally Posted by cookiesowns

There's not much of a use for doing 3.5bar in manifold, as in order to take advantage of it, you'd have to retrain the neural models for the airflow calculations which NO ONE to date has done yet. ( take a look at Dodge/GM w/ HP Tuners and the progress they're making there )

A tune done properly can make do without the neural model changes, and run 3.5TMAP in charge pipe and regular 2.5 in mani just fine. You just need to know how the airflow model in the dme works.

Yes the issue in OP is due to not logging the RAM parameters for boost target, i believe BM3 now has this. This is why is important to pick a tuner that has done not just a variety of cars on and off dyno, but also those that are intimately familiar with BMW technical functions, and the inner workings of the bosch MED17 + BMW changes on the MEVD17.

My tuner still did not figure out what is the issue is. I guess I'll give it till this week to sort the issue. If not, I'll shoot you an email cookiesowns

[n55david]

Originally Posted by cookiesowns

There's not much of a use for doing 3.5bar in manifold, as in order to take advantage of it, you'd have to retrain the neural models for the airflow calculations which NO ONE to date has done yet. ( take a look at Dodge/GM w/ HP Tuners and the progress they're making there )

A tune done properly can make do without the neural model changes, and run 3.5TMAP in charge pipe and regular 2.5 in mani just fine. You just need to know how the airflow model in the dme works.

Yes the issue in OP is due to not logging the RAM parameters for boost target, i believe BM3 now has this. This is why is important to pick a tuner that has done not just a variety of cars on and off dyno, but also those that are intimately familiar with BMW technical functions, and the inner workings of the bosch MED17 + BMW changes on the MEVD17.

so are comfortable doing bm3 tunes for this platform with the 3.5bar map on say a ps2 car with a dorch stage 2 and upgraded lpfp running e85/e85 blend?

[cookiesowns]

Originally Posted by Phantom10R

so are comfortable doing bm3 tunes for this platform with the 3.5bar map on say a ps2 car with a dorch stage 2 and upgraded lpfp running e85/e85 blend?

For that type of setup, and the desire to run FlexFuel, I'd go with ECUTek. I don't know when BM3 is going to release CustomROM for the M2

[n55david]

Originally Posted by cookiesowns

For that type of setup, and the desire to run FlexFuel, I'd go with ECUTek. I don't know when BM3 is going to release CustomROM for the M2

I don't have an m2.. this is the 3 series forum.