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Jimmy9190
Dodge Dakota
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1/20/2008
23:10:06
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 Subject: Home brew intake question
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Ok I'll try to keep this short. I made a home-made cold air intake for my truck yesterday. I made it from 3" PVC pipe and a K&N filter. I just went to Autozone and opened every K&N box till I found one that had a mounting flange on it that fit my pvc pipe. It turned out to be a cylindrical filter that cost about $56.00. I wasn't sure my creation would work so I made sure to get confirmation I could return the filter if I needed to. So I put my home-made CAI on my truck and went for a test drive. Maybe it was psychological but the truck did seem to run better and have better throttle response. And contrary to what I expected the engine seemed to run quieter, not louder. It seemed my creation had worked.
Now to make a long story a little longer, last night and today I read on here and other web sites how K&N filters may not filter very well and read the stories of fouled sensors, oil up in the intake, throttle body etc. I found a lot more bad reviews of K&N than good ones. It didn't make sense to me to have anything with oil in it upstream from my throttle body, either. So I removed the CAI and reinstalled the OEM unit with its Purolator paper filter. But I kept thinking about it and I found out that the K&N I bought from AZ is the replacement filter for a 2004-2006 Chevy Colorado. My truck is a 2001 V6 5-speed CC. My question is does anyone know if I used the plain paper version of the Chevy filter to make my CAI would it work as well? Or does the filter on a CAI have to be a high-flow like K&N or other oiled cotton high-flow type/brand? If I could get the Purolator, Wix etc. paper filters to work I would probably keep my home-made intake.
Sorry for the long post but I would appreciate any info.
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RadioMan
Dodge Dakota
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1/21/2008
06:51:40
|  RE: Home brew intake question
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I would think a paper filter using your home
brew system would still be better than the
factory unit.
There are other name brand high flow filters on
the market that require no oiling and will fit
your home brew system...
I'm using a K&N drop-in at the present time. I
plan to replace it this spring with a high flow
non-oiling type only because what I seen wrote
up about the K&N.
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miltonwaddums
Dodge Dakota
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1/21/2008
14:15:24
| RE: Home brew intake question
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Jimmy,
Glad to hear your project turned out ok. And thanks for being specific about your question. I get annoyed by people asking: "My trucks not runnin' right. Can you help?".
My guess is that any filter that will fit that Colorado would work. My only concern is that the 3.5L is only rated for 220 hp. A filter that is rated for this will have a greater pressure drop at higher horsepower numbers than a filter made for an engine with say, 400hp. It's just a thought, but I'm sure fitment is more important to you than that extra 1/4 hp.
The K&N filter you have is probably:
http://www.knfilters.com/search/product.aspx?Prod=E-0773 The website lists the flange dimensions.
I would just call Amsoil or Wix and get the flange dimensions from them for their filter.
Wix (Amsoil) filters (no brand flaming please) may be a good alternative to K&N. I have personally ran K&N for 2 years without problems so I really do not have an opinion on the matter. Just my $.02.
Jay
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Jimmy9190
Dodge Dakota
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1/21/2008
21:40:00
| RE: Home brew intake question
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Thanks Jay & RadioMan. Jay is right about the K&N part # I had. Today, I bought a Fram air filter for the Colorado that had the same shape and flange and put the intake back on my truck. It seemed to work the same as the K&N setup did, but there was a lot of engine ping with it. This tells me that it was really providing cooler air to the engine. I live in Florida and my engine does tend to ping when we have cool weather. But this thing did not work near well enough for me to keep it, so again I put the OEM air box back on and decided to leave well enough alone, at least for the time being. I may get a cat-back system and a V8 TB if I can find one, then maybe I will put in a dry flow aftermarket intake, because then it would make sense. For now my truck runs fine like it is. I just wish it were stronger and faster.
Thanks for your help here.
Jimmy
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