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Old 05-08-2006, 11:04 AM   #1
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I realize that cool air is dense, so having

an engine breathe cool air is good.

I realize that I am like cool air, too....

But I sure can't see why the CAI Systems

are better than OEM...
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Old 05-08-2006, 11:04 AM   #2
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I realize that cool air is dense, so having

an engine breathe cool air is good.

I realize that I am like cool air, too....

But I sure can't see why the CAI Systems

are better than OEM...
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Old 05-08-2006, 11:23 AM   #3
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Eddie, I believe it's not the temperature difference between the two systems, but rather a more unrestricted air flow (mass & velocity). Also a side benefit has been relocation & system sealing to eliminate any swallowing of rain water.
just my 2 cents.
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Old 05-08-2006, 12:11 PM   #4
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At the S&B Air Filter Web-site, they have

an Air Flow Calc. where you input engine

size and RPM to get Air Flow in Cubic Feet per

Minute.

Doing that: 496 cu. in. @ 3200 RPM = 367 CFM

454 cu. in @ 3200 RPM = 336 CFM

My OEM Donaldson Air Filter Box and Element,

they say, flows 1325 CFM.....

So, the OEM stuff flows 4 TIMES the CFM flow

that the Big Block pumps at Max Torque.. ?

See where I'm confused??
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Old 05-08-2006, 07:25 PM   #5
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Eddie, who's they ?
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Old 05-08-2006, 07:45 PM   #6
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Jestme13:
Eddie, who's they ? </div></BLOCKQUOTE>

=========================================

"They" would be the Donaldson Filter

Folks. You can read all about their

Filters on their Web-site....@

http://www.donaldson.com/en/engine/s...ary/007336.pdf

The Air Cleaner on the P12 is located on page 7 of this .pdf

file, and is called a Radial Seal EDG Filter and the text says

it will flow 1325 CFM.....
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Old 05-09-2006, 08:08 AM   #7
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Ed, I couldn't find the data with the CFM. Is that CFM for the filter, or, the entire intake system ? To be honest, during my examination of the system it seemed to be very restrictive with the sharp bends and switch backs (friction)I still want to replace the system from the MAF to the manifold. I believe there will be additional gains in efficiancy.
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Old 05-09-2006, 08:51 AM   #8
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I may be all wet here but I think Eddie is confused on terms and may be mixing apples and oranges.

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content"> My OEM Donaldson Air Filter Box and Element, they say, flows 1325 CFM..... </div></BLOCKQUOTE>
To me this means that the filter system CAN flow xxxx not it does.

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">496 cu. in. @ 3200 RPM = 367 CFM
454 cu. in @ 3200 RPM = 336 CFM </div></BLOCKQUOTE>
Again this means that you NEED xxxx cfm at yyyy rpm.

I posted the following over on the WCC forum and in my opinion is why some OEM systems are NOT the best.
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content"> Nothing wrong with the stock filter. It works and produces little noise. But, from my perspective its big, bulky, over sized, inefficient in moving air, has two many bends/turns, weighs a bunch (14 lbs) and a PIA to change the filter. Speaking of filters, the OEM monster even has a foam cover which restricts the air flow even more.

The air enters a 8" tube, makes 3 turns, goes in 1 end of 8"x16" filter box via 4" connection pipe, passes thru a foam layer covering the filter, thru the filter, exits the opposite end of the filter box via 3"+ oval connector, then thru the 3.75" MAF, makes a right turn up the intake pipe and 2 more turns before it gets to the engine intake. </div></BLOCKQUOTE>

Now take a look at a CAI box. Little or no restrictions, full flow filter and maybe a bit more air flow from the grill area.

The only real way to tell is to have an air flow meter mounted and hit the dyno.
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Old 05-09-2006, 07:47 PM   #9
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<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by oemtech:
The only real way to tell is to have an air flow meter mounted and hit the dyno. </div></BLOCKQUOTE>The boys over at Brazels' RV, iRV2 sponsor, have been there and done that.

Come and meet Steve and Mike from Brazels' who are attending the 2006 iRV2.com National Rally in Sevierville, TN this July.
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Old 05-10-2006, 05:17 PM   #10
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will they beat us up ?
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Old 05-11-2006, 07:01 AM   #11
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Originally posted by DriVer:
"The boys over at Brazels' RV......"


I think that they have a dog in the race, here.
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Old 05-11-2006, 08:23 AM   #12
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On this Air Intake "stuff" .... I just installed a K&N Filter in the stock intake system.What I found was :

From engine (a hard plastic 3-1/4 pipe)"to a formed rubber 90o Bend that is 3-1/2 @ pipe to
4-1/2 at top of air cleaner housing. This is where it gets interesting. top of "bell shaped housing is 4-1/4 in the middle of that is a solid 2-1/2 pipe to top middle of filter. The air sensor is also in this part of housing.
The bottom part of housing, where the filter sits, is also bell shaped, and it REDUCES to
2-1/2" at the ONLY ENTRY!!!!
What a "plumbers nightmare". they also have placed a plastic shroud on the front that exetends to just above the batterieswith about 2" clearance to the transmission cooler on the back side.

Talk about restricted air flow !!!!

[IMG]Intake system Motorhome (OEM) 002[/IMG]
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Old 05-16-2006, 06:31 AM   #13
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I'm pretty sure that the OEM engineers
built a system to fit in the area they
were given...why else on earth would they
snake a air cleaner in there like that?
I had to go look at a buddy's Winnie on a
V-10 Chassis to see what you were talking
about...wow...
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Old 05-16-2006, 11:43 AM   #14
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Hey Steady Eddie, Yep, I think they had Nitemares thinking that system up.Iyo want to see something really wierd .... you ought bto see the fix they dreamed up in 2000 ... a tube that "plugged" into the bottom and made a 180 turn and went to the top of the air cleaner on the outside!!! Un-believeable !!!

"Ride it like a Ford"
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