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  #13  
Old 11-05-2010, 11:37 AM
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Re: Cold Air Intake on 5.7L WK

I have the Airaid for my 5.7 and I love it! Sounds great, performs great and looks great!
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  #14  
Old 11-05-2010, 02:15 PM
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Re: Cold Air Intake on 5.7L WK

I have the aFe Stage 2 and love it. I had the BWoody installed for one winter and the snow/ice packed on the filter pretty good, so I took it off and am running the aFe. I'm in Minnesota and have quite a bit of snow, but you may experience different results in your neck of the woods.

I still have my 4" BWoody, just haven't taken the time to clean it up and throw it in the classifieds yet. Another winter is approaching, so I won't be running it anytime soon.
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Old 11-05-2010, 05:49 PM
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Re: Cold Air Intake on 5.7L WK

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Originally Posted by kevin06vino View Post
I still have my 4" BWoody, just haven't taken the time to clean it up and throw it in the classifieds yet. Another winter is approaching, so I won't be running it anytime soon.
How much are you asking for your old bwoody?
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Old 11-05-2010, 07:00 PM
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Re: Cold Air Intake on 5.7L WK

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Originally Posted by thex2 View Post
How much are you asking for your old bwoody?
I'm thinking $225 shipped. It's the wrinkle black finish with the 80mm elbow. It's got a few light scratches where it passes by the radiator support and the filter could be recharged...it's got about 12k miles on it.
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  #17  
Old 11-06-2010, 05:36 PM
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Re: Cold Air Intake on 5.7L WK

Atleast you guys have the option of intakes, I am having no luck at all finding 1 for the diesel
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Old 04-27-2011, 06:49 PM
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Re: Cold Air Intake on 5.7L WK

I just ordered the Mopar Performance CAI, but now I am second guessing my decision after reading this. What kind of pros and cons would i get with the mopar vs. a different brand.

I've got a 2008 wk with the hemi, but other than the intake that is coming, everything is stock.

I also get the employee discount on mopar parts, so price wasn't exactly an issue if that is one of the draw backs of the mopar.

thanks in advance.
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  #19  
Old 04-28-2011, 09:50 AM
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Re: Cold Air Intake on 5.7L WK

Deos the Mopar have a box around the filter ? some aftermarket ones do not, like the K & N, which makes it a hot air intake. These may sound cool, but they result in less horsepower than the stock intake.

Underhood temps are much higher than outside temps, and if the intake is sucking that air in, you lose a good deal of power. The fornula for HP generated as a function of air temperature is as follows;

Assuming my 2006 Hemi engine develops 340 HP at 59 deg F which = 15 deg C, this represents 288.15 deg K on the Celsius absolute temperature scale. To calculate change in HP, take the square root of the quotient of the standard temperature (288.15 deg K) divided by the proposed temperature in deg K and multiply that by
340.

For example:
What is the HP output at 30 deg F (-1.11deg C) where the absolute temperature is 272.04 deg K?
1. Divide 288.15 by 272.04= 1.059
2. Take the square root of 1.059=1.029
3. Multiply 340 (1.029)= 349.86 HP

What is the HP output at 0 deg F (-17.78 deg C) where the absolute temperature is 255.37 deg K?
1. Divide 288.15 by 255.37=1.128
2.Square root of 1.128=1.062
3. 340(1.062)= 361.08 HP

Conversely, one can calculate the HP decrease as ambient temperatures rises above the standard.

The temperature at 80 deg F (26.67 deg C) where the absolute temperature is 299.82 deg K.
1. Divide 288.15 by 299.82=.961
2. Square root of .961=.980
3. 340(.980)= 333.2 HP

so for intake air temp at:
100 deg F=37.78 deg C=310.93 deg K = 327.42 HP

IF air is being drawn from underhood rather than CAI, it can be at around 140 F or higher in summer temps;
140 deg F=60 deg C=333.15 deg K = 316.2 HP

To calculate HP at any given temperature, simply convert the ambient temperature either F or C to absolute. For those of you who want to work exclusively with the F scale, you can use the Fahrenheit absolute temperature scale where 59 deg F=518.67 Rankine.
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  #20  
Old 04-28-2011, 09:59 AM
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Re: Cold Air Intake on 5.7L WK

I have an airaid intake tube. Being plastic and getting hot from normal driving, would it be beneficial to try and create a "heat deflecting surface" around this tube? I've been suspicious, and after reading the last post here, there seems to be a pretty big difference in HP depending on air temp. Thanks for responses! Good thread!
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  #21  
Old 04-28-2011, 11:51 AM
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Re: Cold Air Intake on 5.7L WK

Quote:
Originally Posted by dmsfun View Post
Deos the Mopar have a box around the filter ? some aftermarket ones do not, like the K & N, which makes it a hot air intake.
The Mopar is a dry filter with the metal box and seal on the top edge. I also ran a piece of aluminum dryer hose from behind my grill to the filter.

Dave
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  #22  
Old 04-28-2011, 02:26 PM
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Re: Cold Air Intake on 5.7L WK

i too would like to know about the mopar one because i'm one of the people on the maxcare unlimited warranty. If i were going CAI, i'd want that one since it's from the factory.
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Old 04-29-2011, 08:42 AM
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Re: Cold Air Intake on 5.7L WK

Quote:
Originally Posted by bluethunderjeep View Post
The Mopar is a dry filter with the metal box and seal on the top edge. I also ran a piece of aluminum dryer hose from behind my grill to the filter.

Dave
I thought of doing this also but was concerned that the dryer hose may also funnel rain water into the engine in a downpour.
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  #24  
Old 04-29-2011, 02:11 PM
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Re: Cold Air Intake on 5.7L WK

Quote:
Originally Posted by dmsfun View Post
I thought of doing this also but was concerned that the dryer hose may also funnel rain water into the engine in a downpour.

After close to a year and a half, there has been no issues. I've checked the filter after driving at highway speeds in heavy rain, and it's never even felt damp.
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