For people Interested in running a Dual MAF stage 3 or 3+ set up....long

Snow Trooper Is Numb · 12-01-2005, 10:09 PM

With the help of Mike2ks4, Cable (RSform), and Piggie I have finally gotten it to work. My problem was not being able to decide on what approach to take since all three of those guys had a different oppinion on how to best accomplish it. In the end it was the Simplest approach that ended up working for me after I worked through some bugs. Thanks to mike2ks4 for the idea and guidence and putting up with mundane questions....

Here is what you need to do for the MAFs. This is for Bosch sensors, I am sure there is a hitachi solution. but who runs those things anyway

Get two VW TDI MAFs (part# 0 280 218 063, also cross references to the 2.0 N/A motors) from the dealer, they gave me 2 when I asked to measure some and found these to be 60mm. They are ones with bad sensors and they just throw them away since there are so many, if you cant get one then try another dealer. Mine gave me 10 when i went back and told them how sweet it worked.

At first I ran them at 60mm (area of 2827.43, basically the same as an 85mm MAF) and i was going rich. This was due to me maxing them out. The housings have a step in them for a flow straightener to sit in, the ID of where this step is 63.5mm... we will get back to this number later.

I put them on my lathe and opened up the housings to be even with this step, this is very easy to do and if you dont have a lathe the time to pay someone for this should be less than 20 bucks. The reason I opened them up to 63.mm is because the area of two MAFs of this nature is just barely shy of the area of a 90mm MAF (3166.92x2= 6333.84 opposed to 6361.72 for a 90mm). Just perfect for most of us stage3 or 3+ guys. The housing could be opened up a little less for someone with less hardware or with less air flow needs. FYI dual 62 is about equal to an 88mm Maf(3019x2= 6038 opposed to 6082 for a 88mm), and dual 60mm is the same as a 85mm as mentioned before, the possibilites are all there for the popular sizes. Fine tune as neccasary.

Now for the question everyone has been asking...

I only have one hooked up. It works fine. the other one is a dummy of sorts to make sure everything is the same in regards to flow of air to the turbos. my intake tubs are the same exact lengths and bend radius. and filters are the exact same. i feel this is supperior to the y-pipe since the drivers side has a smoother air flow path then the pass side. I can plug in either one and the result is the same. The ECU reads the volume of air coming in the smaller singlebank the same way it would both banks through a MAF with twice the area for air to flow.

As for piping, well that can be another post someday. It isnt complicated or expensive. I just feel that is a personal touch on my part and i may change it to something cooler looking

later

Mike2kS4 · 12-01-2005, 10:17 PM

I'd love to see some MAF logs. Now you have me thinking evil thoughts again, D'oh! But my car is "fast enough" lol.

It's great to see our crazy idea come to fruition

Geez, I need to get to sleep.

Snow Trooper Is Numb · 12-01-2005, 10:19 PM

I also need to get ECUx.... this Vag-Com logging BS makes me feel like some sort of weekend warrior hack job. LOL

Mike2kS4 · 12-01-2005, 10:23 PM

I absolutely love it. It's as good as anything any tuna has ever done. It's sometimes flaky but it gives absolutely amazing data.

golfrsi · 12-01-2005, 10:25 PM

Snow Trooper Is Numb · 12-01-2005, 10:28 PM

I actually wont get a chance to mess with it again for a few days. i have super important stuff to do like snowboarding. lets shoot for monday.

I want to get the pipes done in a polished thin wall stainless. Ooooohhhhhh maybe chrome LOL

Kimchee · 12-01-2005, 10:40 PM

YFF.....

yeah snowboard/ski > work.... always.

golfrsi · 12-01-2005, 10:42 PM

crazy hard since there really is no pressure through them.... could be fabricated pretty easy with a lost mold design ... bonus would be you get damn smooth intake passages...

not mine, but a teaser pic.....

$240 worf of puddin · 12-01-2005, 10:51 PM

can't wait for the pics

Snow Trooper Is Numb · 12-01-2005, 11:02 PM

i can here ricers up the road doing donuts/ trying to get out of thier driveways........ this makes me miss living in tahoe

12-01-2005, 10:09 PM	#1
Snow Trooper Is Numb Junior Member Account #: 101085 Join Date: Dec 2005 Posts: 826	For people Interested in running a Dual MAF stage 3 or 3+ set up....long With the help of Mike2ks4, Cable (RSform), and Piggie I have finally gotten it to work. My problem was not being able to decide on what approach to take since all three of those guys had a different oppinion on how to best accomplish it. In the end it was the Simplest approach that ended up working for me after I worked through some bugs. Thanks to mike2ks4 for the idea and guidence and putting up with mundane questions.... Here is what you need to do for the MAFs. This is for Bosch sensors, I am sure there is a hitachi solution. but who runs those things anyway Get two VW TDI MAFs (part# 0 280 218 063, also cross references to the 2.0 N/A motors) from the dealer, they gave me 2 when I asked to measure some and found these to be 60mm. They are ones with bad sensors and they just throw them away since there are so many, if you cant get one then try another dealer. Mine gave me 10 when i went back and told them how sweet it worked. At first I ran them at 60mm (area of 2827.43, basically the same as an 85mm MAF) and i was going rich. This was due to me maxing them out. The housings have a step in them for a flow straightener to sit in, the ID of where this step is 63.5mm... we will get back to this number later. I put them on my lathe and opened up the housings to be even with this step, this is very easy to do and if you dont have a lathe the time to pay someone for this should be less than 20 bucks. The reason I opened them up to 63.mm is because the area of two MAFs of this nature is just barely shy of the area of a 90mm MAF (3166.92x2= 6333.84 opposed to 6361.72 for a 90mm). Just perfect for most of us stage3 or 3+ guys. The housing could be opened up a little less for someone with less hardware or with less air flow needs. FYI dual 62 is about equal to an 88mm Maf(3019x2= 6038 opposed to 6082 for a 88mm), and dual 60mm is the same as a 85mm as mentioned before, the possibilites are all there for the popular sizes. Fine tune as neccasary. Now for the question everyone has been asking... I only have one hooked up. It works fine. the other one is a dummy of sorts to make sure everything is the same in regards to flow of air to the turbos. my intake tubs are the same exact lengths and bend radius. and filters are the exact same. i feel this is supperior to the y-pipe since the drivers side has a smoother air flow path then the pass side. I can plug in either one and the result is the same. The ECU reads the volume of air coming in the smaller singlebank the same way it would both banks through a MAF with twice the area for air to flow. As for piping, well that can be another post someday. It isnt complicated or expensive. I just feel that is a personal touch on my part and i may change it to something cooler looking later

12-01-2005, 10:17 PM	#2
Mike2kS4 Elder Member Account #: 38083 Join Date: Jun 2002 Posts: 12,104	Great job man. Glad I could be of help :) I'd love to see some MAF logs. Now you have me thinking evil thoughts again, D'oh! But my car is "fast enough" lol. It's great to see our crazy idea come to fruition Geez, I need to get to sleep. __________________ 2002 S4 Avant, 6spd. Bone stock. <a href="http://www.autospeed.us"> </a> Caveat: Any advice I express regarding potential tuning and such is purely informational. If your knowledge and abilities are not up to the task, no amount of advice can assist.

12-01-2005, 10:19 PM	#3
Snow Trooper Is Numb Junior Member Account #: 101085 Join Date: Dec 2005 Posts: 826	As soon as I have a better working laptop I will get you some logs... I also need to get ECUx.... this Vag-Com logging BS makes me feel like some sort of weekend warrior hack job. LOL

12-01-2005, 10:23 PM	#4
Mike2kS4 Elder Member Account #: 38083 Join Date: Jun 2002 Posts: 12,104	Yea, I think you have to call APR, beg and plead, and you might get it... I absolutely love it. It's as good as anything any tuna has ever done. It's sometimes flaky but it gives absolutely amazing data. __________________ 2002 S4 Avant, 6spd. Bone stock. <a href="http://www.autospeed.us"> </a> Caveat: Any advice I express regarding potential tuning and such is purely informational. If your knowledge and abilities are not up to the task, no amount of advice can assist.

12-01-2005, 10:25 PM	#5
golfrsi AudiWorld Super User Account #: 46784 Join Date: Nov 2002 Location: Philadelphia, PA Posts: 3,789	awesome idea, but how can you tease us with this without posting a pic of a 2.7 running with no Y?

12-01-2005, 10:28 PM	#6
Snow Trooper Is Numb Junior Member Account #: 101085 Join Date: Dec 2005 Posts: 826	its snowing outside, too damn cold to go snap some. I actually wont get a chance to mess with it again for a few days. i have super important stuff to do like snowboarding. lets shoot for monday. I want to get the pipes done in a polished thin wall stainless. Ooooohhhhhh maybe chrome LOL

12-01-2005, 10:40 PM	#7
Kimchee Member Account #: 15573 Join Date: Feb 2001 Posts: 25,882	WTF? YFF..... yeah snowboard/ski > work.... always.

12-01-2005, 10:42 PM	#8
golfrsi AudiWorld Super User Account #: 46784 Join Date: Nov 2002 Location: Philadelphia, PA Posts: 3,789	or carbon :-0 depending on your layout a set of carbon pipes would be hot, and not crazy hard since there really is no pressure through them.... could be fabricated pretty easy with a lost mold design ... bonus would be you get damn smooth intake passages... not mine, but a teaser pic.....

12-01-2005, 10:51 PM	#9
$240 worf of puddin Member Account #: 259 Join Date: Mar 2000 Posts: 2,150	noob =P can't wait for the pics __________________ A6 2.7T 6sp = dead 10/27/08 2005 Allroad epl stg 3 and more stuff = shaggin waggon

12-01-2005, 11:02 PM	#10
Snow Trooper Is Numb Junior Member Account #: 101085 Join Date: Dec 2005 Posts: 826	it is totaly dumping down here, i just went and proped all our windshield wipers up i can here ricers up the road doing donuts/ trying to get out of thier driveways........ this makes me miss living in tahoe

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