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Old 10-27-2003, 12:18 AM   #1
Sub_Speed_Guy
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Default How did u make your intake?

I need idea's on why my homemade intake is messin my car up. I have the hotwire style MAFS. I mated a 3in PVC 90degree elbow to it and slapped a K&N on the end and she runs, but chugs and sputters a bit after 3500 rpms. Any ideas?
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Old 10-27-2003, 11:06 AM   #2
Kevin Thomas
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Default Re: How did u make your intake?

Quote:
Originally posted by Sub_Speed_Guy
I need idea's on why my homemade intake is messin my car up. I have the hotwire style MAFS. I mated a 3in PVC 90degree elbow to it and slapped a K&N on the end and she runs, but chugs and sputters a bit after 3500 rpms. Any ideas?
A picture is worth a thousand words. On another note, my finger points to the gasket between your MAF sensor and the air filter itself. For some reason, I think either that connection or the connection of your intake piping to your throttle body isn't sealed properly. Are your vacuum lines tightened enough?

I'm a novice here so maybe some of the old schooler owners can help.
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Old 10-27-2003, 04:44 PM   #3
Sub_Speed_Guy
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Thumbs up Re: How did u make your intake?

Quote:
Originally posted by Sub_Speed_Guy
I need idea's on why my homemade intake is messin my car up. I have the hotwire style MAFS. I mated a 3in PVC 90degree elbow to it and slapped a K&N on the end and she runs, but chugs and sputters a bit after 3500 rpms. Any ideas?
I'll check the gasket. I wish I could post pics, but have no digital camera.
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Old 10-29-2003, 10:30 PM   #4
AdamNDJ
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Default

Do you have any joints in the PVC? Like where a straight piece goes into an elbow? These can leak unless you glue them up pretty good. ABS (the black stuff) is actually a little better for intakes and such, as it can handle higher temps that are common under the hood than PVC can. Lotsa luck.
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Old 10-30-2003, 12:00 AM   #5
Sub_Speed_Guy
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I am getting indications from people that the sharp angle at which I have made to the MAFS, is causeing the ir to be "turbulent" and there for screwing with my readings.
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Old 10-30-2003, 08:04 PM   #6
Kevin Thomas
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Default Hey

Quote:
Originally posted by Sub_Speed_Guy
I am getting indications from people that the sharp angle at which I have made to the MAFS, is causeing the ir to be "turbulent" and there for screwing with my readings.

Does the angle that you have your intake going into the MAF look similar to this?





I found another pic with a guy using a 'smoother' bend at the same spot.




This guy (2nd pic) eventually changed his intake setup to look like this.


Sorry for all the big pics but it helps with understanding. It's turbocharged but maybe you can adapt what you see to your setup. I asked the guy how he hooked up his air filter tubing to the Maf sensor and here is the reply I got: "The tubing is all a combination of Lowes (hardware store) and schucks. Same goes for the piece that connects the air filter to the MAF, or so the previous owner MikeW told me, he's the one that did the original CAI setup, i just reused that piece." His username is 'SubaruTex' at the USMB site.

The reason I posted the last pic and the posters response was because usually, when a cold air intake filter (like the K&N unit you see) is used, there is a type of funnel inside of it that helps with straightening the turbulent air before it goes through the MAF. I thought that might help solve your problem somewhat.
Hope this helps!

Last edited by Kevin Thomas; 10-30-2003 at 08:20 PM.
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Old 10-30-2003, 11:20 PM   #7
Sub_Speed_Guy
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Mine is most similar to the first pic? What kind of thing can I put into the pipe to smooth out the air flow?
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Old 10-30-2003, 11:23 PM   #8
Sub_Speed_Guy
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Also, can anyone make me an intake. I would be willing to pay for shiping and all the good stuff, cause my intake just insant working out.
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Old 11-01-2003, 12:34 PM   #9
aRSe
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Default mine

The top pict (thanks Kevin) is my old setup, ran it for thousands of miles with no problems.
I'd look else where for your problem.
you can see my new system on the left here



Have you changed the fuel filter lately, does the A/F meter go lean when it chuggs?
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