maf output

[psbarham]

Just been thinking about tuning and I was wondering what the output of the maf was? I'm guessing its a scalable voltage of 0-5v?

[ILLEGAL]

i believe it frequency based.. eg: 0hz-5000hz.

[Wodjno]

Would this help ? Not VR4, Mitsubishi..

http://easyautodiagnostics.com/mitsubishi_maf_diagnostic/test_mitsubishi_maf_1.php

[The Vee]

Vortex type with a frequency output I believe. Would be good to be able to intercept it if it were voltage;)

[psbarham]

Vortex type with a frequency output I believe. Would be good to be able to intercept it if it were voltage;)

thats what i was wondering,

does that mean the ecu sees the frequency? or does it see a voltage?

[The Vee]

Maybe NJ could find out? I'm not aware of any kind of converter/rectifier whatever but I also thought our ecus were only 0 5 12 volt as it were. NJ - any bits found in them there ecu readings that could help?

[Eurospec]

The ecu wants a KVF frequency, there are a number of devices that will translate a hotwire maf voltage to a kvf frequency, or for that matter a map sensor voltage.

In the US they have sucessfully converted the ecu's primary load acess to map voltage in evos, however they are using the later evo ecus which have a secondary map sensor which is used in the case of maf failure, thus the tables and load scaling are already present.

Cheers,

Ben.

[The Vee]

Ah thank you Ben, so the ecu does read it directly. Maybe worth looking into one of those reader devices. Paul, guess what the subject on Thursday will be.....oh hang on, Trainspotting - forgot Wodj 'll be there! /pan

[Wodjno]

.....oh hang on, Trainspotting - forgot Wodj 'll be there! /pan

WTF ?? Your the Trainspotter Andy, as you have been for many years /yes As you well know, i hate trains and the tracks they run on :kiss:

Re the MAF.. Sounds interesting /yes

[pezza]

WTF ?? Your the Trainspotter Andy, as you have been for many years /yes As you well know, i hate trains and the tracks they run on :kiss:

Re the MAF.. Sounds interesting /yes

Hmm HSTs, class 43s, 91s 319s :D

What u thinking of doin PSB?

[Wodjno]

Hmm HSTs, class 43s, 91s 319s :D



No idea what your talking about Mr Ezza /help

[swinks]

Seeing that US thread. Wonder if it's any use of that pin1 auxilliary 0-5V output. If there are voltage changes along frequency signal, then that's it.
Paul, 0-5V throttle body output any use?

[swinks]

Seeing that US thread. Wonder if it's any use of that pin1 auxilliary 0-5V output. If there are voltage changes along frequency signal, then that's it.
Paul, 0-5V throttle body output any use?

[bradc]

Anyone who will have ever used evoscan will have seen the airflow reading which goes anywhere from about 50hz to about 1450hz depending on how much airflow is going through the car

[ILLEGAL]

Anyone who will have ever used evoscan will have seen the airflow reading which goes anywhere from about 50hz to about 1450hz depending on how much airflow is going through the car

Aha! that will explain why i hit fuel cut when i tried to load 3000Hz+ onto my map table!! lol. got a wideband now i can see what im puttin in.

...MAF-T will translate KVF -> voltage. the pro kit is also a AFC controller so you can upgrade injectors at the same time and lean them out.

Apexi AFC and S-AFC will let you change the KVF out put.

What are we trying to achieve here?

[The Vee]

For me it's a long on going thing, tweaking things for certain conditions but also with the ability to run stock. Fair to say I also just like fiddling with the thing!! Can't answer for Paul but I'm sure he'll be here soon

[The Vee]

Brad, although I have Evoscan, never really used it properly - have to have a look at that. AFR meters and the like is more my diet!

[Nutter_John]

0-3400hz seems to ring a bell as the defined range , not that you would be able to get 3400hz :)

As Richard said what are you trying to achieve ?

[psbarham]

Bugger,
I was hoping the MAF convert the Hz reading to a variable 0-5v voltage that the ecu used, If it did then I was thinking along the lines of using a MAP sensor and remapping the ecu to suit.

hey ho, looks like a map2 and deeper pockets then.

[Nutter_John]

On the evo using the Tephra modded ecu you can run Speed Density but none of this code has been ported to the vr4 image yet

But if you've got a 7202/7203 why not stick with the stock maf and remap the ecu ?

[psbarham]

But if you've got a 7202/7203 why not stick with the stock maf and remap the ecu ?

I have both to play with, I'm running an 03 at the mo which i have to say as a side note gives better AFR's at part throttle that an 01/02.
I was just trying to be different thats all, you know us lot out east, we like to lead the way :D

[Davezj]

couldn't you use some kind of frequency converter to manipulate the output.
a divide by x2 or whatever you want, or some kind programable divider based on the throttle position sensor output.

i was thinking the other day about the possibility of swapping the MAF to a MAP which would do away with an lot of pipework under the bonnet, and free up some space for something else.

[ILLEGAL]

But if you've got a 7202/7203 why not stick with the stock maf and remap the ecu ?


yep.. i wouldnt waste my time with a piggyback ecu if i could chip my factory ecu.


the standard AFM is not a restriction being that its almost 3.75" plus if you still use a panel type filter it has a real good cold air intake setup on your cars.