Easily scale your MAF for larger housings! (now with 50 percent more hitachi!)

[maZer.GTi]

This should allow for a fairly close rough scale for bosch sensors in larger housings. Some fine tuning may be required, but so far the results look promising. You can specify the offset of MLHFM, or allow the program to find it automatically. When specifying the offset, make sure to follow this format:

0x[MLHFM offset]

Please, check the results before flashing, and report any problems or observations.

MAFadjust for Bosch sensors, by maZer.GTi and ddillenger

Notes:
- Fixed 16bit overshoot bug
-Fixed Hitachi bug, now results for hitachi should be ok
-New Version will write create txt file for copy and pasting into winols or tunerpro
-Please remember to correct the checksums prior to flashing.
-Failing to specify an offset for your MAF transfer function
will result in an automated search. Please verify results prior to flashing.
-When specifying a percentage scale,
use the change in surface area, NOT diameter.
-Unless specified, calculations are for Bosch sensors.
For Hitachi, please remember to specify that in your command.

Usage: mafadjust [yourfile].bin [old_diameter] [new_diameter] [0xMLHFM_offset]
Usage: mafadjust [yourfile].bin [increase_diameter_percent] [MLHFM_offset]
Usage: mafadjust [yourfile].bin [old_diameter] [new_diameter] hitachi

Usage examples:

-- 73mm MAF scaled for 83mm housing
mafadjust 8D0907551A.bin 73 83

-- 73mm MAF scaled for 83mm housing, MLHFM @ 0x10D72
mafadjust 8D0907551A.bin 73 83 0x10D72

-- 73mm Hitachi MAF scaled for 83mm housing, MLHFM @ 0x10D72
mafadjust 8D0907551A.bin 73 83 0x10D72 hitachi

-- MAF scaled for 30% larger housing, MLHFM @ 0x10D72
mafadjust 8D0907551A.bin 30 0x10D72


Have fun, please post here with any feedback or suggestions

[fknbrkn]

thanks
it worked

result is very close to mine (rescaling by crosssection + calibrating by logs)

[maZer.GTi]

thanks
it worked

result is very close to mine (rescaling by crosssection + calibrating by logs)

Big thanks for your feedback
If you have some tips to make this tool better just let me know

[userpike]

Big thanks for your feedback
If you have some tips to make this tool better just let me know

Works great! Do the numbers represent I.D.?

[NOTORIOUS VR]

Very cool!  But is there a reason why this is for the Bosch MAF sensor only and not the Hitachi?

[ddillenger]

Lot more Bosch sensors in use than Hitachi. That, and Hitachi isn't as difficult to do manually.

It'll be added though. Bosch just took priority due to the difficulty in calculating the areas of reverse flow.

[masterj]

Very cool, Andreas!

[TCSTigersClaw]

thanks! I will try as soon as possible

[userpike]

Do the numbers represent I.D.?

The reason I ask is because my ori MAF housing has an O.D. of 70.12mm on my digi caliper. I have a 225 MAF housing with an I.D. of 69.92 mm with an O.D. of 79.82mm so I'm a bit confused.

[ddillenger]

All measurements are ID.

[maZer.GTi]

Very cool, Andreas!

Thanks

[NOTORIOUS VR]

Lot more Bosch sensors in use than Hitachi. That, and Hitachi isn't as difficult to do manually.

It'll be added though. Bosch just took priority due to the difficulty in calculating the areas of reverse flow.

Very cool!  Thx

[ddillenger]

Mazer did the heavy lifting.

[em.Euro.R18]

I'm not as computer literate as most on here but application seems to pop up for a second then disappear. Not sure how to run this type of file.

[fknbrkn]

run itfrom command promt (WIN+R > "cmd")