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      08-17-2013, 04:34 AM   #1
katsooba
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N55: moving the MAF to a new intake

Hi guys, im toying with the idea of rerouting the air intake on the N55 to the front of the engine, and making it a 3" diameter.

has anyone tried this? did putting the MAF in a 3" diameter pipe cause any false readings?

i will still locate it about 4" from the filter, just with longer wires and a different size pipe.
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      08-17-2013, 10:30 AM   #2
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If you decide to do that you will need some custom tuning from a flash based tune like Cobb. Honestly, moving the MAF can cause all kinds of problems by no longer getting an accurate reading of the air coming into the engine which is very important to how it will run. You will basically need to correct/adjust the way your car runs for whatever error they will be in the reading from the MAF. If you just move the MAF without a correcting tune you will lose power and you computer will constantly be trying to adjust things as the AFR it will get from the O2 sensor will not tie in with the air it thinks is coming in from the MAF sensor. You can account for the difference with some dyno time and a custom tune but it will take some time and a decent tuner. The guys trying to make big big power will eventually go this way but I don't know how much of a benefit it will be on a FBO car.
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      08-17-2013, 05:05 PM   #3
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Move the MAF, you'll make more horse power
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      08-18-2013, 01:49 PM   #4
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Hi Clove,
Thank you for the answer,
im currently with JB4 S2 and a cp-e downpipe and a custom made charge pipe.

why i am asking about moving the MAF?
well, i want to move the filter location using an after market filter from the stock location and routing - which sits ON TOP of the engine and soaking all of its heat - to the front of the engine, where the ram intake is and the filter located at the right side of the engine.

just like the new M135I engine is setup as pictured. i can guess you see the difference and the more logical location.

i am not asking about moving the MAF around the stock piping,
im asking to put the MAF at the same place relative to the new filter [about 3-4 inches from it] but in a whole new place

see the pic attached.
Name:  2012-BMW-135i-coupe-engine-parts (Custom).jpg
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p.s

Thank you sfvalley for your educated reply.
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      08-18-2013, 02:34 PM   #5
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Quote:
Originally Posted by Clovef View Post
If you decide to do that you will need some custom tuning from a flash based tune like Cobb. Honestly, moving the MAF can cause all kinds of problems by no longer getting an accurate reading of the air coming into the engine which is very important to how it will run. You will basically need to correct/adjust the way your car runs for whatever error they will be in the reading from the MAF. If you just move the MAF without a correcting tune you will lose power and you computer will constantly be trying to adjust things as the AFR it will get from the O2 sensor will not tie in with the air it thinks is coming in from the MAF sensor. You can account for the difference with some dyno time and a custom tune but it will take some time and a decent tuner. The guys trying to make big big power will eventually go this way but I don't know how much of a benefit it will be on a FBO car.
+1 on this. Moving the MAF can cause headaches. MAF sensors are very sensitive to the piping and housing they are in. They don't just read the same if you change the housing or piping around them.

I think the heatsoak is not as significant as you might think. The intake system is mostly on the intake side of the engine bay, not the exhaust side, and the plastic isn't going to transfer that much heat. BMW didn't do a bad job with the intake system, and I wouldn't be so quick to discard it.
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      08-18-2013, 02:46 PM   #6
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i am not so quick to discard it, but bmw themselves seem to discard it.
touch the part that sits on top of the engine after a 30 min drive, that little isolating pad that is under the intake doesnt make any difference, that pipe is HOT!

i guess it wouldnt hurt trying, its a 30 min project with the proper tool.

already took it apart, just waiting for some parts to get here in a couple of days.

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      09-03-2013, 08:30 PM   #7
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      09-04-2013, 05:15 AM   #8
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i will update soon, just got my silicon couplers and working on making the maf adapter
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      09-04-2013, 08:47 AM   #9
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Anyone know why BMW decided to go with a MAF sensor on the 55? I'm so thankful we got a MAP on the 54, makes it much less stressful to play around with and you can alter air flow without as much concern (BOV comes to mind).

Cool idea OP.
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      09-04-2013, 10:19 AM   #10
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Quote:
Originally Posted by katsooba View Post
i will update soon, just got my silicon couplers and working on making the maf adapter

Looking forward to it!
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      05-03-2020, 12:46 PM   #11
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still no update
project on hold
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      05-04-2020, 07:58 PM   #12
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Holy smokes blast from the past.................. 7 year project hold?
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      05-05-2020, 03:09 PM   #13
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Yup:-)
been busy with other on car projects like a full bodywork 1M and some more stuff but mainly life held me up

See attached

This included the revozport roof and hood swap.

Too bad they stopped answering cause i want some more parts.
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      05-05-2020, 07:48 PM   #14
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Wow thats looks really aggressive, love the hood
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      05-06-2020, 01:54 AM   #15
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Thank you:-)
i love how it turned out.

maybe in the next couple of months i will look again into the maf relocation option

I wonder why no vendor tried this
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      05-17-2020, 03:05 PM   #16
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I bought a used F22 CTS intake (MAF attaches differently) & I have an M-Design intake to try to do this. I messaged CTS asking if they could make something simple for our cars like the B58 intake linked below, several emails and no response. Relocating the coolant tank looks easy enough with just putting a longer hose in between the existing one and 1 new long one, a few companies make MAF extensions. It really looks simply enough after you find the right angle to come off the turbo with. Plus you can run a nice F22 engine cover.

B58:

https://www.ctsturbo.com/product/cts...40-b58-intake/

F22:

https://www.ctsturbo.com/product/cts...sedan-435i-ix/
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      09-14-2020, 07:02 PM   #17
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Anyone done this yet? Been looking at it myself, and I agree, eliminating a few feet of piping and silliness would, potentially, improve performance. The question is always in the real world, does it make a difference.

I may try this, but I wouldn't have the means to test it any time soon.
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      09-17-2020, 05:16 AM   #18
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Well, i made an extention to the maf connector to move the maf closer to the inlet, also made a maf adaptor on a 3" super short aluminum pipe,

But... one thing i forgot.
to make a pcv inlet, dangit
what do i do qith the pcv now?
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      09-17-2020, 01:10 PM   #19
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Quote:
Originally Posted by katsooba View Post
Well, i made an extention to the maf connector to move the maf closer to the inlet, also made a maf adaptor on a 3" super short aluminum pipe,

But... one thing i forgot.
to make a pcv inlet, dangit
what do i do qith the pcv now?
Catch can? It 100% sure if that is one of the hoses that goes to a catch can but if it is that would be an option.

Answered my own question! https://www.mishimoto.com/engineerin...ch-can-part-3/
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      09-18-2020, 01:48 AM   #20
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A catch can is a good idea, but it would have to recirculate into something after it gets into the catch can

Wouldnt want that oil steam floating around in the engine bay

I guess i will have to make a new inlet of some kind
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      09-21-2020, 05:02 PM   #21
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put the catchcan inlet into the pre-turbo if you can. I've used fittings like this before, basicaly cut a hole, and it sandwhiches in place. then you can thread on any fitting you need, like a hose barb.

http://www.siliconeintakes.com/holse...er/-p-500.html

Post up some photos of what you have.
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      03-02-2021, 05:31 PM   #22
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Quote:
Originally Posted by katsooba View Post
A catch can is a good idea, but it would have to recirculate into something after it gets into the catch can

Wouldnt want that oil steam floating around in the engine bay

I guess i will have to make a new inlet of some kind
Did you ever get around to this? Or anyone else?

I am also interested in understanding if any changes were required on the tuning side to make this work.
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