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Thread: 3.5" pipe on 2.75" compressor inlet and N62 MAF?? Will it work??

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Posts: 1-9 of 9
2013-02-17 07:10:11
#1
3.5" pipe on 2.75" compressor inlet and N62 MAF?? Will it work??
Well guys, I have a quick question. Looks like I made a mistake when ordering my compressor inlet pipe and instead of it being 2.75-3" as I expected, lets just say it was much bigger..........

Now, here is the question; will there be any issues with running a 3.5-4" induction pipe with one end to a N62 MAF housing and the other being a ran to the compressor inlet of a turbo (2.75" inlet size)??

Please negate the issue of me ordering the incorrect size as it was a simple mistake on my part and the part cannot be returned

Thanks!
2013-02-17 15:39:30
#2
What's the diameter of the N62 MAF? I am unfamiliar.
2013-02-17 17:21:49
#3
Re: 3.5" pipe on 2.75" compressor inlet and N62 MAF?? Will it work??
n62 is 3inch you will need to get a silicone reducer for both sides ..it would look funny but it can work

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2013-02-17 18:54:51
#4
If you had to stretch it that would be one thing..... but if you need to stack more than 1/4" of hose to make it fit snug I think you're just asking for a boost leak. Now if you were running blow-through you could get away with and intake pipe set up kinda funny.

Short answer; IMO just get the right part.
2013-02-17 19:36:36
#5
Originally Posted by BenFenner
What's the diameter of the N62 MAF? I am unfamiliar.


Slightly bigger then 3" OD, I think it's closer to 3.15", always a pita getting 3" couplers on them!

Originally Posted by Benito
If you had to stretch it that would be one thing..... but if you need to stack more than 1/4" of hose to make it fit snug I think you're just asking for a boost leak. Now if you were running blow-through you could get away with and intake pipe set up kinda funny.

Short answer; IMO just get the right part.


He is doing it on the turbo intake side, so no boost pressure, staking couplers would work, but would be rather crappy imo.

Now I think I have a spare 2.75" to 3" coupler Chris, I was gonna go 3" intake but am not going to bother. If Keo stops slacking and comes down already, I can get it to you through him .
2013-02-18 15:37:42
#6
Thanks for the response guys! Turns out I may give it a shot if the correct coupler comes my way. That or modify the housing to fit the N62 MAF.

@Vadim, I will be down i the VA beach area some time over this upcoming weekend. I will send you a text/email and let you know my details
2013-02-18 17:33:39
#7
MAFs really like straight pipe around them, with no size changes either. A honey-comb style mesh before (and after) can help a lot in that area if you have to do bends or size changes.
You know me. I'd get the right size stuff.
2013-02-18 17:38:36
#8
I see your point Ben. Stabilized (i.e. straightened) airflow is the name of the game when it comes to MAFs.

Hmmmmmm.
2013-02-19 18:25:41
#9
Here are some general numbers I found on locations. You want to have at least a few inches of straight pipe before the MAF, after the MAF it doesn't really matter. This is why I like draw through a little more, I can have the filter directly on the MAF with a flowstack to normalize the flow.

Also some other numbers:
Draw through
MAF should be at least 12" from turbo inlet

Blow Through
MAF should be at least 12" from Butterfly
BOV should be at least 6" from MAF
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