Pin 1 = +5 volts
Pin 2 = Barometer
Pin 3 = Airflow Hz
Pin 4 = +12 Volts from MPI
Pin 5 = Ground
Pin 6 = Intake Air Temp
Pin 7 = Reset

So, the correct crossover wiring to our MAS plug is:
3G/EVO Pin 1 to 1G MAS Pin 4
3G/EVO Pin 2 to 1G MAS Pin 7
3G/EVO Pin 3 to 1G MAS Pin 2
3G/EVO Pin 4 to 1G MAS Pin 3
3G/EVO Pin 5 to 1G MAS Pin 6
3G/EVO Pin 6 to 1G MAS Pin 8
3G/EVO Pin 7 to 1G MAS Pin 1

The GOOD 3G MAS to find is the #482, from the Variable-Induction V-6. It flows about 99% of what an EVO MAS does.
I cut up the base to our stock aircan, and mounted the 3G MAS inside, so it looks like stock! Pictures to follow.

I cut the front mounting ring off my old GVR-4 MAS, and JBWelded it to the 3G MAS:

I had to move the connector cutout about 1/4", due to interference with the 3G MAS. I JBWelded a piece of sheetmetal underneath the aircan, and another piece fitted to the hole, to bring it up flush. I also had to then drill new holes, and tap them:

I also had to JBWeld the connector gasket unto the connector, as there was no longer any way to attach it inside the aircan:

Here's the finished MAS, almost ready to put on the car:

I had hoped that this EVO K&N setup would all fit inside the aircan, but it was 1/8" -1/4" too long. With some work, or a slightly different filter assembly, I think it would fit. However, since my REAL intention was to use the 1G K&N I already had, I didn't try to make it fit:

To use the 1G K&N, I ended having to hack all 4 mounting corners off the 3G MAS, and also remove the plastic shroud that surrounds the 7-pin connector, to allow the filter to slide on easily. The only 2 bad things I ran into:
1) there isn't any place for my BCS return vacuum line, so I have a small vacuum leak at the moment
2) the step inside the aircan doesn't allow you to use a 3G connector, so I just soldered all 7 wires directly unto the pins, and shrinkwrapped them. I'll try to put a couple more pictures up (tomorrow when the rain stops)of the finished installation. It looks TOTALLY stock!
With my new 3G MAS correction code, #880 started right up, idled perfect, and runs wonderfully. I can actually feel the difference in power, just from removing the restriction the stock MAS causes.
I know other guys have used 3G MAS's, and have some issues, but I think most of the problems stem from the fact that this MAS flows 25% more air for the same Karman Hz as a 2G, and 67% more than a 1G, so you have to add a LOT of air on an AFC.

The #482 V-6 MAS flows so close to an EVO MAS that the 2 could be interchanged, and no one would probably notice. The graphs I've drawn show them less than 1% different, as far as Hz per liter of air intake, airflow capacity, and air pressure drop.
I'm trying to get ahold of an EVO MAS, so that I can test it 100%. But, if you look at the #482 MAS, you will see that the entire 3" inlet is unobstructed, unlike the more common #501 MAS and others that have the airhorn covering part of the inlet.

Wow, great work. How does this compare to the GM maf?

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Wow, great work. How does this compare to the GM maf?

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I can't say, as I don't know all the specs on a GM 3" MAF, but I doubt it is quite as good. I'd say this MAS has got to be good to at least 400HP, like the 2G, but the GM MAF is made for MUCH higher HP applications. But, its not nearly plug-and-play, and then you have all the tuning hassles. I'd say that if your HP goals are 400HP or less, this MAS would be a better choice.

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And how does this compare to the 2g MAS?

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Its gotta be better! According to the spec sheets, the #482 MAS and EVO MAS have <.5 psi of pressure drop at 240 liters of air per second, whereas the 2G is listed as a maximum of almost 1 psi at the same airflow. The 3G/EVO MAS flow 25% more air for the same Karman Hz, as I said, so they are not directly interchangeable. But, the 3G/EVO has the EXTRA advantage of having a ROUND outlet, making it MUCH easier to work with than a 2G. I can DEFINITELY FEEL the difference in #880, although its 99% stock.

And, yes John, thank you VERY much for the little present. As you can see, its going to good use. In the long run, it may not be what #880 ends up with, but it gives me the ability to test and tune it so others can benefit too. I plan to do the same thing with a 3" GM MAF, so I can swap it in too for testing.

" this MAS flows 25% more air for the same Karman Hz as a 2G, and 67% more than a 1G, so you have to add a LOT of air on an AFC. "

Jeff base on you info 2G MAS flow 29% more than stock 1G...so 67%(1g) - 25%(2g) = 42% different...but why 1G to 2G only 29%...is there a way to calculate this...

1. 1G to 2G = 29% ,so if I change the to 2G MAS, can I just add 29% on the safc for all RPM point from stock setting? (MY ECU are JDM dual board so can't logging..need to go wideband dyno for actual setting confirmation, so i need the base setting first before going for dyno..so far changing from 1G MAS to 2G MAS i can feel it pull a bit harder than before)

2. some of 2G come from stock with screw flush out and some are in..like mine i got stock evo3 (2G mas) with screw flush out...it's it still 29% different

3. 3G MAS / Evo MAS flow that you are calculate base on screw in or out?

I don't think so. The MAS wasn't intended for the heated air post-turbo. I can't tell you what would happen.

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The MAS wasn't intended for the heated air post-turbo.

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Neither was the GM-MAF, right?

Any comments on the MAF's internal tables and airflow count capabilities? Not just the physical airflow properties.

The 2G looks to be bigger than the EVO at a glance this is why I ask. I assume that the EVO is a more developed unit.

WHAT do you think an evo 8 mas is worth ? street price.

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WHAT do you think an evo 8 mas is worth ? street price.

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Is there anything that you won't sell?

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lol ! i'm trying to buy one from someone.

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This MAS was designed to be used on some big V-6's, like the 3.5l Montero Sport, or the Eclipse GTS model I believe.

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Not sure If they all do,but I worked on a 3.5 Montero Sport a few days ago,It had a #501 MAS.

I was thinking all the Sports had the 3.5l,after a Google search I may be mistaken... I wish I knew then it was something I was going to need to remember!

Must have been a 3.0 then..DOH!!

Installed on my stock one that I am trying very hard to not modify (and not succeeding )
Tom

Oh, by the way, here is how I resolved my "leak" becuse I didn't have a place for the BCS to connect to:

I drilled a 1/8" hole on the intake hose, and JB Welded a LONG pop-rivet into the hole. Works perfect!

The adapters are the same for a 2g and a 3g, so it is available at almost any of the vendors that cator to us.
To answer your to Jeff question, my car is stock (as in even has stock exhaust); and the www.dsmchips.com eprom eliminates the need for an SAFC.
Tom

Like this nice K&N with a metal adapter:
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=38634&item=7951159713&rd=1
This one *might* even fit inside the stock aircan:
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=38634&item=7951142637&rd=1
Cheap:
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=38634&item=7951069447&rd=1
This one looks a little nasty:
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=38634&item=7950962999&rd=1
Another cheap one:
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=38634&item=7950773428&rd=1
This might be like Tom's:
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=38634&item=7950456030&rd=1

Here is my first update:

I ordered an air filter w/2g flange from Ebay Monday night. I ordered 550 injectors from DSMparts also on Monday at 1:30pm.

The air filter stuff was sitting on my door step this afternoon (Friday), and it came from CA in 4 days using UPS ground.

When ordering the injectors from DSMparts, I asked if they had them in stock and they said YES. I told them I needed them on Friday. They told me to pay the extra fee for 3 day select so they would be here. So I did. Well, guess what. They are not here. I called at 5:00pm today (as soon as I got home) and they said they can't get me any shipping info because they are just an ordering parts line. They said that they can't get me any info until Monday morning. This is bullshit. By Tuesday morning (Feb 1st 1:30am) I received 2 e-mails from them confirming the order, and approving the payment. Very bad customer support.

I will never buy parts from DSMparts again.

I will tell all of my Friends not to buy from them either.

Sorry about this, but I need to vent.

This is the last time I will post about this, except to move it to "Bad Vendor" when it becomes available.

Today, they finally told me that the injectors were 3 days out from THEIR warehouse. Then they would forward them on to me, and that would be another 3 days.

I canceled my order. I will shop elsewhere.

They never even said that they were sorry once. Very bad way to do business.

Potential customers beware, go somewhere else.

Tom, show them how you mounted the coil pack!

The bracket that goes from the block to the intake manifold did not get installed yet. It will not work without some modifications. Going to set a motor up on the bench and mod one that way-then install it on the car.
Here is a pic of the coil pack mounting. I installed tape on the wires just to give them some added support as they are vulnerable sticking up the way they do. (and yes, it needs redone, lol).

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2G = 2700 Hz MAX at .1153 Hz per liter = 311 liters per second
3G = 2200 Hz MAX at .1478 Hz per liter = 325 liters per second

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Not exactly up on my airflow levels with popular turbos and boost levels, but 2200Hz should be good for say...E3/20G/sleeper 16G at around 20psi?

Great info Jeff. I currently have the MAFT fad and I think it's garbage; considering i'm not looking for more than 300whp in #1948 (daily driven) I think this would be a great mod. Do you think it's necessary to have the stock aircan to support the MAS?

I plan to do it like Terry on my car that remains mostly stock.

In case you need a 3g maf...

http://www.galantvr4.org/ubbthreads/showflat.php?Cat=&Board=UBB1&Number=197529&page=0&view=collapsed&sb=5&o=31&fpart=1

Yes, it flows more air and that means you can feed a bigger turbo w/o restriction.

What kind of electrical connector does the 3G MAF use? Same as the 2G or do you need a 3G specific one?

Will the 2G MAS out flow the 3G MAS if the 2G MAS IS HACKED??


Thanks,
Armando

92VR4 894/1000
91VR4 948/2000

I doubt it, but all bets are off when you start "hacking". Why don't you test it and get back to us?

Just choose the compensation closest, like the 2G MAS in DSMLink, and then move the sliders up to add to the airflow, as per the graph I posted. I've talked to Tom Dorris, and that is how he is going to suggest people deal with it. Thats the same way you deal now with a hacked MAS in DSMLink, and it works rather well.

For those that are converting to a 3G MAS, here is the wiring/color code to help make it easy. If you have already upgraded to a 2G Mas then it is pin to pin.

is a 3g mas adaptable to a dejon intake with a 2g mas on it?

Thanks to Iceman and Keydiver, I am getting ready to install my 3G MAS. Since the wiring is so easy, I just potted up an adapter, 2G to 3G today. Here are a couple of pictures. Once the potting has set up I will make a more permanent black cover.

For reference, the Evo VIII 3G MAS is #399.

Bringing up this old thread to add one piece of information I had overlooked previously:
The documentation I have on the 2G #609 MAS indicates a pressure drop across the MAS of .92 psi at 240 liters/second of airflow. The spec on the #482 MAS is only .54 psi at 240 liters/second! That's probably good for 3-4 HP right there!
The EVO8/9 MAS is only rated at .526 psi pressure drop at 240 liters/second, in case you were curious. More good reasons to choose a #482 3G or EVO MAS over a 2G MAS.
Also, just to repost since it comes up fairly often, the #501 MAS is NOT as good as the #482 or EVO #399 MAS. It is only rated by Mitsu for 210 liters/second, and has ~.78 psi pressure drop because of the larger airhorn blocking the inlet.
I am now stocking complete packages of the good #482 MAS with the 1G-to-3G harness adapter:
#482 MAS package

Quoting 1uGlyGalaNt:

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Are they good for more power than a 2g mas?

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