MAF transfer curves

dx4picco · **Posted:** Sat Aug 31, 2019 4:13 am

I never knew e36's were so light they could drive upside down

pazi88 · **Posted:** Sat Aug 31, 2019 5:33 am

Maybe he's from australia

But the car is my friends car where the m62tu maf is.

jammapic328 · **Joined:** Sun Aug 18, 2019 1:37 pm **Posts:** 43

pazi88 wrote:

Maybe he's from australia

But the car is my friends car where the m62tu maf is.

I don’t understand the upside down comment... I’m from UK

How many V does that m62tu MAF read at 250hp?

gadziuWLKP · **Posted:** Mon Sep 09, 2019 2:47 am

I have a conversion done and the 2048 option is selected, does each subsequent maf scaling correction require fulflash in my case?

318Ti · **Posted:** Mon Sep 09, 2019 7:19 am

No, just the partial is ok for subsequent flashes.

dx4picco · **Posted:** Sun Sep 15, 2019 1:01 pm

is the BMW part number 13621433567 and Bosch 0280217814 same as the alpina 3.5" in the excel?

gadziuWLKP · **Posted:** Wed Oct 02, 2019 5:00 am

Have you encountered the problem of registering MAF error short to + when moving to WOT.
In the logs, the flow meter does not reach more than 4.6v at max load and errors occasionally register at lower loads but always above 1300 real load. Then there is an interruption for about 2 seconds and driving on probably VE because it drives with AFR 11 or the engine stops and you can start after resetting the MAF error.

Dharekt · **Posted:** Wed Oct 02, 2019 8:30 pm

I’m having issues copying the data from the excel spreadsheet to romraider, the copy paste function doesn’t seem to work for the 256x1 setting, any remedy’s for this fix or am I missing something?

Sent from my iPhone using Tapatalk

pazi88 · **Posted:** Thu Oct 03, 2019 2:25 am

Dharekt wrote:

I’m having issues copying the data from the excel spreadsheet to romraider, the copy paste function doesn’t seem to work for the 256x1 setting, any remedy’s for this fix or am I missing something?

Copy table doesn't seem to be working for maf tables. Only copy selection. Which isn't that easy to do for 256x1 maf table

e30 · **Joined:** Mon Jun 17, 2013 12:42 pm **Posts:** 16

Have anyone tried to switch to MAP using this methods?

bernardo774 · **Joined:** Thu Aug 17, 2017 3:21 pm **Posts:** 24

For a E46 330 3,5 Tube, what is the best maf table with Nissan?

dx4picco · **Posted:** Sun Nov 10, 2019 1:10 pm

pazi88 wrote:

Anyone else tested the 540maf from m62tu? It's also used in 4.8litre v8 engines which have 370hp and uses 3.5" housing as euro s50 maf. BMW part number 13621433567 and Bosch 0280217814

Bit interesting to wire, because it has 5 wires and the fifth one is +5v reference from ecu. But damn according to my logging and calculations it should flow up to 1600kg/h and still seems pretty accurate down low. And those can be bought for dimes as used. And new genuine Bosch is like 150usd.

Ok. Here is the scalar. Tested and working so that it matches stock MAF:

Attachment:

MAF_scaling_pazi88_m62tu_MAF.xlsx

Engine made 248hp with that (plus s52cams, BBTB, headers, m50 intake and tune)
https://www.instagram.com/p/B0JBy95FT8m ... _copy_link

I do confirm Pazi's maf curve does work!
Available page 10, Mon Aug 12, 2019 2:53 pm

gadziuWLKP · **Posted:** Mon Nov 11, 2019 8:54 am

ba114 wrote:

This thread has been created to discover and document MAF transfer curves for the purposes of:
- Extending the range of a MAF through adding a resistor
- Extending the range of a MAF through increasing the tube size
- Retrofitting aftermarket and MAFs from other cars with known scalars

The current best choice for forced induction is the Nissan 22680-7S000 MAF from a 350z.
I pulled apart a stock 350z rom to get the 64 point scalar and converted it to a 256 point table.
This Hitachi MAF costs roughly $20 and i have tested and confirmed functionality with great results.

I have also included some PMAS HPX MAF scalars, along with a Ford 3" slot style MAF, which is pretty similar to the 350z Hitachi MAF.

Update 28/04/2019:
Attached updated v8 of the scalar spreadsheet.
- 3 new hitachi 22680-7s000 scalars added based on testing in a e46 330i. Revision 2 and 3 have got pretty consistent fuel trims within +/- 5% for all my testing upto around 2.7v. This is based on stock fuel tables scaled for use with 60lb bosch ev14 injectors. If anyone still has a stock setup and cares to test, please do.

Update 15/04/2019:
Attached updated v7 of the scalar spreadsheet.
- Added alternative scalar for hitachi MAF for idle testing.

Update 11/02/2018:
Attached updated v6 of the scalar spreadsheet.
- Fixed re-scaling of tables based on tube size changes

Update 10/02/2018:
Attached updated v5 of the scalar spreadsheet.
- General clean up
- Refined the scalar for Nissan 22680-7S000 MAF
- Added divisor function to 256 Point Scalar Modifier sheet for when you need to reduce the MAF kg/hr due to exceeding DME limits
- Added Alpina 3.5" MAF scalar (Pretty similar to stock MAF in 3.5" tube)
- Added RR 16x16 to 1x256 MAF table converter

I would like to ask if you enter the diameters inside the tube or outside when entering Excel Tube diameters (ID).
For example, for an 80mm pipe outside, we have 76 inside or 3 inches. Right?
Nissan 22680-7S000 MAF from a 350z

jammapic328 · **Joined:** Sun Aug 18, 2019 1:37 pm **Posts:** 43

ID would usually stand for 'Internal Diameter', so I would assume this...

Janis · **Joined:** Thu Feb 20, 2014 6:37 pm **Posts:** 12

Thanks for the file.
Few issues i found. Cant edit stock tube size in "256 Point Scalar Conversion" sheet.
Also doesnt calculate values more than 12xx.

Nissan MAFs are not very common in Europe. So as people here already know Audi RS4 maf is used for MS42/43.
I did some research and according to what i found the maf element is the same as the one used on VAG 2.5TDI (AFB,AKN) engines (we have a lot of these in Europe).
I will check if this is true and test it on my car.

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