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Author Topic: MAF Changing/Tuning Thoughts?  (Read 21431 times)
MmmBoost
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« Reply #15 on: September 20, 2011, 02:55:43 PM »

The photo was mine.

I'm on here as well...  I still don't understand why you want to simply use the sensor you have in a different MAF housing.  Rather than simply using a different MAF sensor/housing and using it's respective MLHFM.

MLHFM is tied to the sensor/housing pair.......not just the sensor.


What MAF are you trying to use and what car is it going into?
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~Chris
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rob.mwpropane
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« Reply #16 on: September 20, 2011, 03:36:07 PM »

Nyet- I have read the S4 wiki many times, thank you for your hard work, great job.

Mmmboost- I was really just curious. I appreciate your awesome pictures. Listen, 6 months ago I had no idea about eeproms, ecu, hexadecimal, etc. I'm just trying to learn all I can. This stuff is just starting to make sense to me....sometimes. The fact that I can respond to you all and follow what your saying is a friggen miracle in and of itself. And honestly, housings are a dime a dozen, and sensors get expensive. If I can find less expensive ways to do things, I will....no, I rarely ever shop on eBay for car stuff. I'm just trying to learn.
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MmmBoost
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« Reply #17 on: September 20, 2011, 08:45:09 PM »

I forgot that you had asked me for some more MAF photos.

Here are some of the shots from my build thread of previous MAFs I have run.  I am now running a B6 S4 4.2L MAF.

http://www.audizine.com/forum/showthread.php/366320-The-Build-A-GT2871R-build-documentary?p=6260959&viewfull=1#post6260959

http://www.audizine.com/forum/showthread.php/366320-The-Build-A-GT2871R-build-documentary?p=6349884&viewfull=1#post6349884

http://www.audizine.com/forum/showthread.php/366320-The-Build-A-GT2871R-build-documentary?p=6371157&viewfull=1#post6371157



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~Chris
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Tony@NefMoto
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« Reply #18 on: September 21, 2011, 02:32:19 PM »

I am still a bit confused on how ME7 handles load >191... got any advice/insight?

The ECU internally has an 8 bit and 16 bit representation of load. The 8 bit value is limited to 191%, the 16 bit value is not. The limit of 191% load is only for the systems and maps using the 8 bit value. I believe the 16 bit value is used almost everywhere, except when it needs to do a lookup on a map using an 8 bit axis value.
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« Reply #19 on: September 21, 2011, 03:19:23 PM »

rl (0xff*.75=191) vs rl_w (0xffff * 0.0234375= something big) ?

i.e. 0x00F98B vs 0x00F990 in mbox?
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Tony@NefMoto
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« Reply #20 on: September 21, 2011, 03:22:39 PM »

rl (0xff*.75=191) vs rl_w (0xffff * 0.0234375= something big) ?

i.e. 0x00F98B vs 0x00F990 in mbox?

Correct. VagCom measuring blocks only show you the 8 bit value. You have to use a RAM based data logger to see the 16 bit value.
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cam
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« Reply #21 on: September 27, 2011, 11:46:47 AM »

I have question and think is good place ...
I want rebuild my TT for about 500HP and need to know which MAF is good and enough for that?
Can anyone help me?
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Rick
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« Reply #22 on: September 27, 2011, 01:50:28 PM »

RS4
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cam
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« Reply #23 on: September 27, 2011, 02:23:57 PM »

Thank you Smiley
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Audi TTQ 225HP APX (GTX3076R, 875cc, Integrated Engineering intake manifold, TIAL WG, TIAL BOV) sold
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cam
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« Reply #24 on: May 19, 2014, 01:13:10 PM »

RS4 MAF is not available in our country so is here any other solution? With stock TT 225HP MAF i have 480HP but MAF gone yesterday Sad

I want stay in about 480HP now because stock gearbox and haldex.
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Cadillac Escalade Platinum ESV 6.2 V8
Audi S4 B5 2.7 BITURBO AZB
Audi TTQ 225HP APX (GTX3076R, 875cc, Integrated Engineering intake manifold, TIAL WG, TIAL BOV) sold
Audi Q7 4.2TDI V8 sold
Yamaha YZF-R1, KAWASAKI GTR1400
WinOLS, EVC OLS300 online emulator, EVC BDM, EVC BSL, Autotuner, CMD, Galletto official, Innovate LC-1, 2wd dyno, EVC dealer
em.Euro.R18
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« Reply #25 on: May 21, 2014, 08:35:47 AM »

Audi s4 v8 maf should work for that setup. For the time being you could try dialing in KFMSNWDK/KFWDKMSN then moving to FVVKS (within map limits). Then beyond map resolution go KFLF first or KLAF. Rescale torque model maps and you should be setup to dial in the new maf.
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pathanas
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« Reply #26 on: June 26, 2018, 06:40:39 AM »

When you are changing from tt 225 maf to rs4 bosch maf which maps should be copied?

MLHFM
MLOFS (keep it 200?)
MLFHFM?
KFMLDMX?
MLMAX?
KFKHFM?
FKKVS?
« Last Edit: June 26, 2018, 08:09:33 AM by pathanas » Logged
littco
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« Reply #27 on: June 27, 2018, 09:54:11 AM »

When you are changing from tt 225 maf to rs4 bosch maf which maps should be copied?

MLHFM
MLOFS (keep it 200?)
MLFHFM?
KFMLDMX?
MLMAX?
KFKHFM?
FKKVS?


You just need to change the scaling the of the MAF initially, MLMAX may need to be increased, KFMLDMX if you get the engine check light , but if you're going with an RS4 maf you must be running a bigger turbo and a lot more maps generally need to be changed.

« Last Edit: June 27, 2018, 09:55:51 AM by littco » Logged
pathanas
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« Reply #28 on: June 27, 2018, 11:29:48 AM »

Thank you
I am upgrading from gt2860rs to gtx 2867r so the maf will hit its limits.
If I am not wrong the tt 225hp maf's limits is about 290 g/sec
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