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Coltrane
Dodge Dakota
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9/01/2005
16:47:41
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 Subject: Air intake
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Message:
I was looking to get an new air intake for my 02 V6 3.9L dak and I was wondering if price is an issue in quality. I would like to know should I need to spend $200+ or get a much cheaper intake for say $20 or $30? Do you actually get what you pay for? If anyone could help me I would be gratefull.
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Adam
Dodge Dakota
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9/01/2005
20:03:10
|  RE: Air intake
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Message:
I only paid $40 for mine. Glad that's all I spent. Basically the biggest thing is it opens up more space for air to be pulled in and you don't have to worry about your airbox keeping you from getting the most amount of air possible.
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It Sucks
Dodge Dakota
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9/02/2005
00:50:24
| RE: Air intake
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Unless you're using some kind of forced air induction or nitrous, the stock intake, airbox included, will pass all the air your engine will ever need.
It's when you go stick an air filter in there, that's when it sucks.
A free-flowing, cleanable, re-useable filter is just the ticket to unstrangle the beast.
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N56629
Dodge Dakota
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9/02/2005
06:48:53
| RE: Air intake
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Open air elements or poorly designed CAI will cost you around 1% or more of your hp. The best designed CAI will not get you more than a 1% increase in hp over the stock intake using a K&N drop in filter. This would apply to generally stock engines.
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prodak
Dodge Dakota
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9/02/2005
15:45:17
| RE: Air intake
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"Unless you're using some kind of forced air induction or nitrous, the stock intake, airbox included, will pass all the air your engine will ever need."
Strictly speaking that may be true, but having tried a cone filter and then switching back to the stock paper filter, removing the snorkel and cutting a larger hole in the airbox (5" diameter) produced the same measureable improvements: +2mpg highway and no dropping out of overdrive on hills (like on Florida I-75) - in other words, more power and efficiency just by letting more air into the box.
And while we're on the subject, for those of you who want maximum mpg, more air is always good, but cold (cool) air will actually drop your mpg. If you don't believe me, try recovering that flap you cut out next to the radiator and see what happens (I did, and my summer mileage went up another 2mpg).
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Justin
Dodge Dakota
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9/03/2005
22:34:49
| RE: Air intake
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On a 4.7, the same effect can be had by putting the IAT sensor in the runner for #5 cylinder. Look at your manifold. You'll find a removable plug there real close to the head end of the runner. Swap the sensor and plug and your sensor will now read a slightly higher temp. Runs slightly leaner, but puts you closer to the ping point.
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N56629
Dodge Dakota
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9/04/2005
08:36:41
| RE: Air intake
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Message:
"And while we're on the subject, for those of you who want maximum mpg, more air is always good, but cold (cool) air will actually drop your mpg. If you don't believe me, try recovering that flap you cut out next to the radiator and see what happens (I did, and my summer mileage went up another 2mpg)."
I believe that is true but only up to a certain point. When I run an open element I seem to get slightly less gas mileage than the stock system with KN filter and box altered to take in more cool air.
However, during the winter I'm sure that the much colder air will not benfit my gas mileage. It might be interesting to someone looking for maximum gas mileage to take air from over the exhaust manifold and duct it into the factory airbox.
If you can get an extra 2mpg from just covering the flap imagine what you would get doing that.
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prodak
Dodge Dakota
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9/04/2005
10:41:54
| RE: Air intake
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Message:
Actually what prompted me to replace the cut-out flap was a post from Larry(J&J Auto) from this thread:
https://www.dodgedakota.net/boards/v6/7538.html
Here's part of what he said:
"You want gas mileage stick your intake tube on the
radiator and let it suck hot air and watch what
happens to your mileage it will jump."
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N56629
Dodge Dakota
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9/04/2005
13:45:50
| RE: Air intake
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Message:
Damn, now I'll have to do some more experimenting. I wasn't going to run my truck this winter but I think I'm going to have to build an airbox over the exhaust manifold and hook my intake to that.
Other than that why do you think that people claim a 2mpg increase when adding a CAI? The filter flows that much better? I don't think its the nice smooth tubing.
It would be nice if someone would flow test some air intakes on a tb.
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prodak
Dodge Dakota
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9/04/2005
15:38:48
| RE: Air intake
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N56629-
When I first got my truck bone stock I was getting about 20mpg highway. Cone filter/no airbox got me a solid 2mpg gain. The only other change I made at the time was switch to Bosch Plats, but I don't attribute much, if anything, to the plug change (replaced nearly new Autolites, correctly gapped).
After reading so much about poor filtration I went back to stock paper filter and that's when I cut the big hole in the airbox - and didn't lose anything compared to the cone. Added V8 TB - no change with the truck empty, but mpg held up better with weight in the truck. Replaced that flap/cutout - last 2400 mile trip averaged close to 25mpg @65mph, AC off, cruise on, upper 80s ambient temps.
99 4x2 CC auto 3.55 LSD, 30" tires, synthetics in motor and diff.
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prodak
Dodge Dakota
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9/04/2005
15:51:53
| RE: Air intake
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Message:
I should add that simply getting more air into the box pre-filter made a noticeable performance gain, and I'm not talking about butt dyno, I mean that constant dropping out of overdrive on hills pretty much went away completely.
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