Thread: MAF->MAP conversion with Tunercode?

Hmm, interesting stuff. The zeitronix box already supplies 5v to it so i would just need to tap into the return signal of it. According to the site, it also is already temperature compensated so would an AIT still be required?

Yes, since the MAP sensor is powered from the box, you just run the 0-5V output (green wire) and sensor ground (black wire) to the MAF sensor inputs on the ECU.

The MAP sensor is temperature compensated internally to reduce temperature drift and produce accurate pressure readings, but it won't give you AIT.

The initial release of TunerCode with MAF->MAP conversion will not be a true "speed-density" system, in that it does not use AIT to calculate the density of the air entering the engine. It will be more like the AEM system in that the fuel map will contain actual base injector pulse widths. Therefore, an AIT sensor will not be mandatory until an actual speed-density version is developed. That being said, there will still be AIT fuel and timing trim tables available for tuning, and it is highly recommended to include an AIT sensor to compensate for temperature extremes.

More info on speed-density is on Moates.net: Theory: Speed-Density Moates Support

Thanks,
Dave

Do you guys have an ET of when this project will be available to the public?

I recently stumbled on a customer that has a gm 3bar map sensor on his sr20det B13. I have not taken a look at the ecu, but it got me scratching me head. I knew for a fact that these things used maf's. The car runs like absolute crap, so who knows wth they did to the car.

We're hoping to get prototypes for code develpement and testing sometime this week.

Dave

Can we get a part number # for the correct 3bar GM map sensor or the one that has the most user friendly scalling?

I'm using this one:
Home » Shop » Sensors » Pressure Sensors » Delphi / GM 3 Bar Style Map Sensor - 12223861 - 16040749 (US Made)
but you can use any MAP sensor that has a 0-5V output and is within your boost range.

Dave

Any idea of when Tunercode will support the MAF to MAP conversion?

Will a write up be provided on whats needed and how to go about the conversion?

Would both be supported at the same time where I could run both MAF and MAP?

We are getting very close on having hardware (Moates NEMU, realtime for Nissan) testing done. TunerCode MAF to MAP conversion has been running under development and testing for quite some time and is being integrated with, and will require, the NEMU board. Integration with Nismotronic will begin soon, followed by base tune development. Rather than predict a completion date, we will keep everyone posted on our progress. Watch the forums, including the Nismotronic Forum and join the Nismotronic group on FB.


Absolutely.


Yes, I am currently using both during development, with the A/C switch used to switch between MAF and MAP. I logged injector pulse width vs. MAP kPa and RPM, while actually running on the MAF, to generate a base fuel map for MAP conversion.

Cheers,
Dave

Will be able to use TunerPro with the new Nemu boards?

Yes, with existing bins, including existing TunerCode bins. Nismotronic will be required for the NEMU version of TunerCode, which includes MAF to MAP. Don't get excited. The package will be very competitively priced.

Cheers,
Dave