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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > Making a custom intake...need some input.



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      10-12-2014, 01:03 PM   #1
paulm3251
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Making a custom intake...need some input.

Hey guys I'm going to be making a custom short ram intake for my N51. I will post pictures when I'm done and hopefully you guys like it and think it will be effective. I just have a question for the initial MAF sensor tube...do you guys know which one I could use...would this work with our MAF? http://www.spectreperformance.com/se...aspx?prod=9405
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      10-12-2014, 01:13 PM   #2
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Hey man this has been done already. Just search MR. 5 intake mod. Might be a better idea
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      10-12-2014, 01:22 PM   #3
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Quote:
Originally Posted by kobeballer96 View Post
Hey man this has been done already. Just search MR. 5 intake mod. Might be a better idea
Yeah I've seen the MR. 5 and every other option...I'm just one of those people that always tries to do something custom whether it fails or not haha I have an idea in my head that might work good by bringing down IAT and save a bunch of money as opposed to getting an Injen or similar.
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      10-12-2014, 01:25 PM   #4
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Have the filter in the bumper - long tube style!
Sorry OP, no advice on what works - you'll have to find out!
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      10-12-2014, 01:59 PM   #5
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Quote:
Originally Posted by paulm3251 View Post
Yeah I've seen the MR. 5 and every other option...I'm just one of those people that always tries to do something custom whether it fails or not haha I have an idea in my head that might work good by bringing down IAT and save a bunch of money as opposed to getting an Injen or similar.
Well good luck. I have the same mind set as you do. Others in here just like to put others down because it's never been done and unknown lol.
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      10-12-2014, 02:27 PM   #6
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Quote:
Originally Posted by TheAxiom View Post
Have the filter in the bumper - long tube style!
Sorry OP, no advice on what works - you'll have to find out!

Well yeah seems the SRI route isn't going to work as expected not enough space to do what I want. My next option is running a MAF adapter with a 3" tube in 2 sections about 6" each. I'm shown using an old 3" intake tube from my Audi to show my plan...Then I was going to remove my fog light and put a Sprint Air filter (waterproof used for motorcyles) in place of the fog light. The biggest Sprint filter is 70mm ID so I would just need to put a 3" to 2.75" reduced coupler on the end...what do you guys think?
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      10-12-2014, 02:32 PM   #7
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Sounds legit. I would love to see a Before/after dyno - do you have anything to log the changes to the A/F ratio, MAF voltage, and/or IAT?

How big of a tube and how big of a filter can you fit in there?
Also, have you considered removing the grill insert next to the fogloght instead of the light itself? What are you going to do for the tubing to the TB?
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      10-12-2014, 03:09 PM   #8
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Quote:
Originally Posted by TheAxiom View Post
Sounds legit. I would love to see a Before/after dyno - do you have anything to log the changes to the A/F ratio, MAF voltage, and/or IAT?

How big of a tube and how big of a filter can you fit in there?
Also, have you considered removing the grill insert next to the fogloght instead of the light itself? What are you going to do for the tubing to the TB?
If I run the Rev motoring intake hose then to a MAF adapter like the Spectre one that I showed a link to above then from the MAF adapter I can run a 3" coupler to however many needed 3" tubes and couplers to get the placement right to be where the fog light opening is. 3" tube would work all the way...I demonstrated in that one picture how the 3" tube does fit through the tight wheel well spot then I have plenty of room to place the waterproof filter. Only variation would be at the end where I would have to use a reduced coupler or short pipe from the 3" pipe to the 2.75" filter opening. I was thinking of putting it at the grill but it flows so much more smoothly to the fog light spot...the angle is perfect. The filter I was considering using as shown is 100mm length and should hopefully fit fine.
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      10-12-2014, 04:04 PM   #9
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Dont know the parts or materials your gunna use. But if you can find a way to run the intake tube all the way till qhere it almost meets the driver side kidney grill and then install a cone filter. I think that would be your best bet or somewhere you can feed it air directly.
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      10-12-2014, 04:14 PM   #10
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Quote:
Originally Posted by dtea604 View Post
Dont know the parts or materials your gunna use. But if you can find a way to run the intake tube all the way till qhere it almost meets the driver side kidney grill and then install a cone filter. I think that would be your best bet or somewhere you can feed it air directly.
To the kidney grill won't work I already tried...filter won't fit because the fan shroud and its just too crammed.I was originally gonna run a pipe to the grill and put a mushroom filter but there is just no room to make it work. I figured this is the next best option and the fresh cold air doesn't get any better then the fog light spot.
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      10-12-2014, 04:16 PM   #11
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Quote:
Originally Posted by paulm3251 View Post
If I run the Rev motoring intake hose then to a MAF adapter like the Spectre one that I showed a link to above then from the MAF adapter I can run a 3" coupler to however many needed 3" tubes and couplers to get the placement right to be where the fog light opening is. 3" tube would work all the way...I demonstrated in that one picture how the 3" tube does fit through the tight wheel well spot then I have plenty of room to place the waterproof filter. Only variation would be at the end where I would have to use a reduced coupler or short pipe from the 3" pipe to the 2.75" filter opening. I was thinking of putting it at the grill but it flows so much more smoothly to the fog light spot...the angle is perfect. The filter I was considering using as shown is 100mm length and should hopefully fit fine.
Take out the grill and you can leave the fog light. It will be a wash either way. I'd like to see the result after you get it fitted. I actually asked about making an intake like this when I first joined -

http://www.e90post.com/forums/showthread.php?t=915461
Glad to see someone do it!
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      10-12-2014, 04:29 PM   #12
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Quote:
Originally Posted by TheAxiom View Post
Take out the grill and you can leave the fog light. It will be a wash either way. I'd like to see the result after you get it fitted. I actually asked about making an intake like this when I first joined -

http://www.e90post.com/forums/showthread.php?t=915461
Glad to see someone do it!
True...yeah hopefully I can make it happen and do a before and after dyno. Someone still has to tell me if this MAF adapter works or not!
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      10-12-2014, 04:34 PM   #13
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Quote:
Originally Posted by paulm3251 View Post
True...yeah hopefully I can make it happen and do a before and after dyno. Someone still has to tell me if this MAF adapter works or not!
No one can tell you, because no one has tried it.
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      10-12-2014, 04:48 PM   #14
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Quote:
Originally Posted by TheAxiom View Post
No one can tell you, because no one has tried it.

Well I mean where to get one that would help me...like for example this member who made a short ram...see the pipe they have worked with the MAF..I need to know where to get that pipe or something along those lines...opposite direction though haha
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      10-12-2014, 04:51 PM   #15
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And by the way also I just realized that if the intake I am trying to put together is a success our engine would also get the additional cooling from the kidney grills directly into the bay because I would leave that first snorkel off if I went with my custom intake...
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      10-12-2014, 05:30 PM   #16
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http://www.amazon.com/gp/aw/d/B00FQQ...110_SY165_QL70


Is this the pipe you need?
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      10-12-2014, 06:13 PM   #17
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Quote:
Originally Posted by kobeballer96 View Post
Well yes and no but more no haha...spending $120 for that would just be stupid based on my goal. Just the small section alone...like this...
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      10-14-2014, 01:21 PM   #18
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Anyone know if it will work? I'd like to get started...if no one knows if the MAF will fit in this pipe or not I guess I will just have to try it and see.
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      10-14-2014, 02:51 PM   #19
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2008 BMW 128i  [0.00]
Take 1/2 usd airbox with MAF
+
Add custom mount for cone filter
+
Connect silicone pipe to throttle body
+ tell us about your custom cone mount solution
= Profit

Alternitivelly Ebay had n52 n54 maf housings
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Last edited by andrey_gta; 10-14-2014 at 03:29 PM.
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      10-14-2014, 08:17 PM   #20
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That just looks like an 1/8" square of aluminum welded to That pipe. You could fab that up or hook up with a local welder on the side. You could buy it and then use that as a guide to making yours and then return it. Those plastic adapters may have to be machined from aluminum also unless you can make them another way. O - rings will be the easiest part. A cheaper option may be to make it from mild steel and just paint it
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      10-21-2014, 06:11 PM   #21
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http://www.ebay.ca/itm/3-5-OD-88-9mm...-/251584310797

BMW maf stuff from ebay
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      10-22-2014, 10:12 AM   #22
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Quote:
Originally Posted by andrey_gta View Post
Thanks man...I have an email into Spectre to see if theirs works but I haven't heard back yet. Rather use the Spectre since its a third of the price so this would probably be my backup. I was thinking of just using the top part of the airbox as a prototype and putting the pipe directly into that for now haha
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