MAF transfer curves

busterhax · **Joined:** Wed Jan 22, 2014 6:54 pm **Posts:** 1773

janithdg wrote:

busterhax wrote:

janithdg wrote:

Hi All,

Does anyone have MAF table for 540i MAF?

Pull the table from the alpina bin in the roms thread. It is close enough.

will it have a positive effect on a m52b28 with m50 manifold and m54b30 intake cam

That depends if you're maxing out your stock maf or not.

janithdg · **Posted:** Tue May 23, 2017 11:54 pm

Quote:

That depends if you're maxing out your stock maf or not.

so its more of DataLogging and tuning till its perfected

ba114 · **Joined:** Wed Oct 21, 2015 2:36 am **Posts:** 980

busterhax wrote:

janithdg wrote:

Hi All,

Does anyone have MAF table for 540i MAF?

Pull the table from the alpina bin in the roms thread. It is close enough.

Which is essentially the stock maf in a 3.5" housing correct?
My spreadsheet calculates this pretty close to that of the maf scaling from the alpine bin.

Bmw454 · **Joined:** Mon Apr 20, 2015 11:21 pm **Posts:** 47

hello guys!
i have bought maf HPX-E, help me please to calculate scaling map for siemens ms41.1
Tube size 3.15"(or stock m52b28 tube)

busterhax · **Joined:** Wed Jan 22, 2014 6:54 pm **Posts:** 1773

Bmw454 wrote:

hello guys!
i have bought maf HPX-E, help me please to calculate scaling map for siemens ms41.1
Tube size 3.15"(or stock m52b28 tube)

You need the spreadsheet from PMAS. It will pump out a 256 value table for you.

Bmw454 · **Joined:** Mon Apr 20, 2015 11:21 pm **Posts:** 47

busterhax wrote:

Bmw454 wrote:

hello guys!
i have bought maf HPX-E, help me please to calculate scaling map for siemens ms41.1
Tube size 3.15"(or stock m52b28 tube)

You need the spreadsheet from PMAS. It will pump out a 256 value table for you.

this is my spreadsheet for hpx-e, but i did not understand how to make 16x16 table for inserting in ms41.1

busterhax · **Joined:** Wed Jan 22, 2014 6:54 pm **Posts:** 1773

Bmw454 wrote:

busterhax wrote:

Bmw454 wrote:

hello guys!
i have bought maf HPX-E, help me please to calculate scaling map for siemens ms41.1
Tube size 3.15"(or stock m52b28 tube)

You need the spreadsheet from PMAS. It will pump out a 256 value table for you.

this is my spreadsheet for hpx-e, but i did not understand how to make 16x16 table for inserting in ms41.1

You can edit the definition file so that the MAF table displays as 256x1 then it pastes right in.

mrf582 · **Posted:** Tue May 30, 2017 3:50 pm

Use this spreadsheet I quickly threw together to convert from a 256x1 array/table to a 16x16 format.

Just paste the Kg/hr values from your PMAS spreadsheet into the yellow cells and then copy the transposed values from the green cells so you can paste it into RomRaider.

Bmw454 · **Joined:** Mon Apr 20, 2015 11:21 pm **Posts:** 47

Quote:

You can edit the definition file so that the MAF table displays as 256x1 then it pastes right in.

i can't insert, because max value is 1024, in my table 2631.6(((

a32guy · **Joined:** Fri Mar 06, 2015 1:01 pm **Posts:** 36

Bmw454 wrote:

Quote:

You can edit the definition file so that the MAF table displays as 256x1 then it pastes right in.

i can't insert, because max value is 1024, in my table 2631.6(((

You'll want to change your MAF mode to 2048 kg/h (found only in your full 256kb file), then you can paste your table in to the appropriate MAF table under the sensor scaling section. Romraider should automatically limit the table to 2048. Are you copying the "Selection3D" cell as well? Romraider needs this to paste the data.

If you are flowing more air than that, you'll likely be approaching the load overflow value of the ECU and will need to do some custom scaling to keep things in order (please correct me if I am wrong MS41 experts).

mrf582 · **Posted:** Wed May 31, 2017 6:47 pm

a32guy wrote:

Bmw454 wrote:

Quote:

You can edit the definition file so that the MAF table displays as 256x1 then it pastes right in.

i can't insert, because max value is 1024, in my table 2631.6(((

You'll want to change your MAF mode to 2048 kg/h (found only in your full 256kb file), then you can paste your table in to the appropriate MAF table under the sensor scaling section. Romraider should automatically limit the table to 2048. Are you copying the "Selection3D" cell as well? Romraider needs this to paste the data.

If you are flowing more air than that, you'll likely be approaching the load overflow value of the ECU and will need to do some custom scaling to keep things in order (please correct me if I am wrong MS41 experts).

Correct.

Also, the highest probability of overflowing the Load variable is during initial boost spool up generally in the 2500 to 3500RPM range. If you are getting close, I would advise that you delay boost spool up a bit till I release a comprehensive fix. Sorry been busy with other stuff to dive into it right now.

Bmw454 · **Joined:** Mon Apr 20, 2015 11:21 pm **Posts:** 47

Quote:

Also, the highest probability of overflowing the Load variable is during initial boost spool up generally in the 2500 to 3500RPM range. If you are getting close, I would advise that you delay boost spool up a bit till I release a comprehensive fix. Sorry been busy with other stuff to dive into it right now.

Guys I have a few questions:
1) Did I correctly insert the calibration of the maf?
2) which version of software is better to tune a turbo? Ms41.1 or ms41.2? Which one is more advanced in terms of detonations?

busterhax · **Joined:** Wed Jan 22, 2014 6:54 pm **Posts:** 1773

Looks like it pasted correctly.

Go with ms41.2. That's where the main development is. ms41.1 was tuned for lower octane gas so 41.2 will have ideal knock maps. But you the knock maps can be copied back and forth easily.

ba114 · **Joined:** Wed Oct 21, 2015 2:36 am **Posts:** 980

Bumping back to the front page for the n00bs that dont like searching

ba114 · **Joined:** Wed Oct 21, 2015 2:36 am **Posts:** 980

Original post updated with v5 of the spreadsheet which has some minor cleanups and a more refined Nissan Slot MAF scalar

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