Maf Numbers, what do they mean?

[BlackMount]

Hi guys I searched around a little but came up with almost nothing in the short amount of time my attention span allowed me to search.

So, I was wondering if anyone could give me a Indepth explanation of what our MAF numbers mean? Example, 399, 506, 483, etc etc. What is the significance of it? I am not asking u to tell me which cars that Maf came on, I'm asking u to tell me what defines those 3 numbers.

-Chris

 

[19Eclipse90]

Mitsubishi defined them.

They are the last three digits of the Mitsubishi part number for that particular MAF.

MD183609, MR578399, MD336482, MD336501, etc.

 

[BlackMount]

OK, What makes one better then the other?

 

[agentorange313]

Hi guys I searched around a little but came up with almost nothing in the short amount of time my attention span allowed me to search.

-Chris

OK, What makes one better then the other?

You obviously did not search very well, and thats a lame excuse for not searching. There are countless threads that cover MAS models 501, 399, 482 and 609 that explains which one is "better". You will find that the EVO MAS has the highest flow rate, 482 and 399.

LMGTFY

 

[BlackMount]

What makes it flow better? Why bother with that, if ## worried about the air restriction of ## maf, run SD it is very cheap to convert to thesedays and you will have no MAF restriction at all.

What about which one makes the car act the best, is most accurate, best mpg, smallest amount of manual correction needed etc... i saw the threads about they flow better, but thats all i saw.

 

[agentorange313]

What makes it flow better? Why bother with that, if ## worried about the air restriction of ## maf, run SD it is very cheap to convert to thesedays and you will have no MAF restriction at all.

What about which one makes the car act the best, is most accurate, best mpg, smallest amount of manual correction needed etc... i saw the threads about they flow better, but thats all i saw.

Not everyone wants to convert to SD. 2g MAS is suitable for 90% of the community as far as power goals. Personally, I do not use SD, I am using a EVO MAS. I like tuning with it and it is within my power goals. I also have never had problems with my tune or had to change it due to the weather. It was also plug and play for me, I did no need to buy a new AIT or a MAP sensor to run speed density, nor did I have to splice the wire or buy an adapter harness for SD (I did for the evo MAS to 1g).

to swap any MAS sensor, gm style, mitsu etc, you need a way to compensate for the new sensor. ECMlink makes that easy by having an option, you can also use SAFC and a MAF box for the GM style.

As far as the part about which is better, flows more, accurate, better MPG, I am not exactly sure. I am sure as the years went on the MAS sensors became more accurate. Evo MAS shows higher air flow at the same HZ as the 2g.

I would further research the link I gave you, I found all the info I needed to determine what MAS system to use.

 

[BlackMount]

Everything u linked me I had already looked through once breifly...found a little bit of what i wanted by reading between the lines however theres alot of BS to read through where OP simply just wants provided Hard Technical Data, and is returned with people just voicing their opions or telling him not to do something or just completely getting of topic... i will continue searching. Sums up most posts on here.

 

[BlackMount]

Ok so more questions.

Found out on here.

1G maf 28lbs/m
2G maf 50lbs/m
3G/evo is 66lbs/m

I have the 609 Maf on my 3000GT right... i replaced the old one (338) with it when it went bad, i was getting erratic maf reads and when car was cold it idled like it had 272s in it, and struggled to go anywhere under load till it warmed up. So replaced with new maf (609) to comfirn it was bad which it was.

Since installation car has been driving pretty good and pulls good. Dyno 187whp ehich is roughly 20more whp then stock and at time i was pretty stock. I am aiming for 200whp next round.

I finally picked up a new maf today (055) i'm about to install it on my 3000GT to see how it does.

Could anyone give me the flowrate for the 055 and 338 Maf so i can compare to 2G/3g/evo maf? I am N/A fyi.

 

[stacked1G]

Ok so more questions.

Found out on here.

1G maf 28lbs/m
2G maf 50lbs/m
3G/evo is 66lbs/m

I have the 609 Maf on my 3000GT right... i replaced the old one (338) with it when it went bad, i was getting erratic maf reads and when car was cold it idled like it had 272s in it, and struggled to go anywhere under load till it warmed up. So replaced with new maf (609) to comfirn it was bad which it was.

Since installation car has been driving pretty good and pulls good. Dyno 187whp ehich is roughly 20more whp then stock and at time i was pretty stock. I am aiming for 200whp next round.

I finally picked up a new maf today (055) i'm about to install it on my 3000GT to see how it does.

Could anyone give me the flowrate for the 055 and 338 Maf so i can compare to 2G/3g/evo maf? I am N/A fyi.

the 055 maf is the same exact thing as a 609(2g maf)

i really suggest doing a bit more research before spending more money.

 

[BlackMount]

Well I prefer to use the sensor my car was issued with, in all the podts i read o never saw anything regarding the similarity between 2G Turbo Maf and 3000GT N/A (DOHC) maf

Car was also idling rough and also wouldnt catch itself sometimes coming down from crusing or light pulls...seems the new maf fixed both of these things cause it hasnt stalled out on me yet and u can now hear the cars nice natural smooth lope in the idle. I also only spent 20$ on the maf. No biggy

 

[19Eclipse90]

The NT 3000GT from 94-98 DOHC used the 2G turbo MAF (609).

 

[RipperXX]

BM, you realize that for instance 250hz air flow (signal) from a 1g maf will NOT be the same amount of air from say a 2 or 3g maf @ 250hz air flow right? My point is without a way to dial in or compensate for the difference, this WILL effect your air to fuel ratio. And could explain both the power increase and running issues. (if it were say running leaner)

You need a piggy back, re-flash or something like Link to correct this so things are in spec.

 

[BlackMount]

The NT 3000GT from 94-98 DOHC used the 2G turbo MAF (609).

I am running a 92 ECU, so i am worrysum about the difference Like i said I the car was showing signs the Maf was bad since they day i put the replacement one in
... i know the 3000GT came with 6 different Mafs, and they did change when they came out with the 2G (94-98) but as far as i know that was only the TT's

BM, you realize that for instance 250hz air flow (signal) from a 1g maf will NOT be the same amount of air from say a 2 or 3g maf @ 250hz air flow right? My point is without a way to dial in or compensate for the difference, this WILL effect your air to fuel ratio. And could explain both the power increase and running issues. (if it were say running leaner)

You need a piggy back, re-flash or something like Link to correct this so things are in spec.

Yes I know all of these things. I should have worded it better but in my OP what i wanted to know was the lbs/min of each maf.

This is a 3000GT not DSM i do not think the car would run with a 1G DSM maf.

I do not in anyway believe the 607 to have a effect in the result of my Dyno runs. I stated it more for a fact that power was not severly hindered at all. I am running a Aggressive Base Timing map (8* Base, 23* WOT) on a healthy motor which is 75% of my extra power I have and then just a few mods.

I should mention thevwhole reason I posted this on the DSM forums vs the 3/S forums is because through searching their was more data here since most 3/s people go speed density or GM MAFT if they do anything other then keep stock maf.