The 6637 AFE alternative!
Hotshot
Joined: Nov 2006
Posts: 11,286
Likes: 263
From: North of Greenville
What I'm wondering is if I need to offer an addapted end on covers for this thing which will suck up inside the end of the element's end opening. It would be best from an air flow standpoint, for sure, but I wonder if the inner bag will simply blow back out when you jump off the throttle and all of the excess boost pushed out the filter.
I'm just thinking out loud, here, but I guess we could mock up a small stainless wire cylinder structure that would fit tightly up inside the "inside" region and hold the inner bag in pace during this back thrust of air. No doubt, though, the inner bag design modification would increase the cost of making the cover... it would for sure double the production time for each cover and require more fabric to boot.
I guess another option would simply be to have "sleeve" option for the cover where ther would not be any "inner" protection... just a sleeve with two open ends.
When yours comes in, Brandon, take a pic of what the inside opening are looks like. I would almost be willling to bet that it is tapered to a near "point" shape at the end closest to the filter mounting neck.
I'm just thinking out loud, here, but I guess we could mock up a small stainless wire cylinder structure that would fit tightly up inside the "inside" region and hold the inner bag in pace during this back thrust of air. No doubt, though, the inner bag design modification would increase the cost of making the cover... it would for sure double the production time for each cover and require more fabric to boot.
I guess another option would simply be to have "sleeve" option for the cover where ther would not be any "inner" protection... just a sleeve with two open ends.
When yours comes in, Brandon, take a pic of what the inside opening are looks like. I would almost be willling to bet that it is tapered to a near "point" shape at the end closest to the filter mounting neck.
Post Fiend
Joined: Nov 2007
Posts: 9,549
Likes: 14
From: Payson, AZ
Originally Posted by maevans
Have you been talking to Gene ?
Nice job with the numbers.
Nice job with the numbers.
Post Fiend
Joined: Jul 2005
Posts: 14,582
Likes: 12
From: 21791
Originally Posted by PaysonPSD
1 Liter = .03531 Cubic Feet - Let's use .035
7.3 Liters = 0.2555 Cubic Feet (7.3 X 0.035)
It takes a 4 stroke 2 revolutions for the cylinder(s) to complete the intake cycle.
CFM for a 7.3L = .2555 X RPM / 2
1000 RPM = 127.75 CFM
2000 RPM = 255.50 CFM
3000 RPM = 383.25 CFM
At least that is what the math says.
7.3 Liters = 0.2555 Cubic Feet (7.3 X 0.035)
It takes a 4 stroke 2 revolutions for the cylinder(s) to complete the intake cycle.
CFM for a 7.3L = .2555 X RPM / 2
1000 RPM = 127.75 CFM
2000 RPM = 255.50 CFM
3000 RPM = 383.25 CFM
At least that is what the math says.
Post Fiend
Joined: Sep 2006
Posts: 7,426
Likes: 6
From: Sioux Falls, SD
Originally Posted by bdrummonds
AFE consistently rates as good if not better than the 6637 for filtration, BUT, where the 6637 is desinged to flow 425CFM the AFE(at least the older smaller cone ) is designed to flow 800CFM. due to the more surface area of this filter I can only guess it should flow more. the Filter is a 5 layer filter (K&N is only a 2 layer) 6637 is a 3 layer. the Pro Guard 7 is a seven layer filter.
I bought it because I go through 2 6637s per year. $78 worth of filters(inc. shipping) and I bought this for $99(inc. shipping) so in a little over a year I will be ahead of the game.
For whoever said that oil from filters would mess with your sensors, nope, dont think so, otherwise Ford would not have plumbed the factory CCV line into the intake pre turbo.
since its the same size as a 6637 you can run Petes cover as a prefilter for this one also.
Just so everyone is clear, I have no vested intrest in this filter other than I am having one shipped to me. I am in no way bashing the 6637, nor am i trying to convert you from the 6637. For me the math works. (I was planning on buying an AFE anyway to run with the new turbo). Diesel site has the cone AFE's for $73.
I bought it because I go through 2 6637s per year. $78 worth of filters(inc. shipping) and I bought this for $99(inc. shipping) so in a little over a year I will be ahead of the game.
For whoever said that oil from filters would mess with your sensors, nope, dont think so, otherwise Ford would not have plumbed the factory CCV line into the intake pre turbo.
since its the same size as a 6637 you can run Petes cover as a prefilter for this one also.
Just so everyone is clear, I have no vested intrest in this filter other than I am having one shipped to me. I am in no way bashing the 6637, nor am i trying to convert you from the 6637. For me the math works. (I was planning on buying an AFE anyway to run with the new turbo). Diesel site has the cone AFE's for $73.
I would like to supply the oil analysis kits for your first two oil changes, that way we can share the results will everyone on this forum to see how the new system compares to the AFE, 6637 & AIS systems as far as filtration is concerned. I'll send you a PM to get your address. It will require an oil change since we want to start off fresh. If your not close to changing at the time of install for the new filter we should hold off the sampling untill after the first oil change with the new system.
Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
Hey Rich, 1000 posts. Congrats. What ya doing on here? Don't you have better things to do right now.
BTW: I just repped ya for that offer in the interest of spreading my fertilizer around.
BTW: I just repped ya for that offer in the interest of spreading my fertilizer around.
Post Fiend
Joined: Sep 2006
Posts: 7,426
Likes: 6
From: Sioux Falls, SD
Coool!!!!! that was 1K post, didn't realize it. Well, everyone is passed out but me - figured I'de stay up & get my fix & a few brews....... bout time I became a sponsor anyway --- since I'm in a good mood with Renee being home on her midtour break....
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Post Fiend
Joined: Nov 2007
Posts: 9,549
Likes: 14
From: Payson, AZ
Originally Posted by strokin_it7.3
That would be correct, on a naturally aspirated engine. Which is technically correct, because you did ask how much CFM the engine flows, and not the turbo. The stock turbo flows in the range of 700cfm if i am thinking correctly, it takes 700cfm into the inlet, however due to pressure it does not always flow 700cfm out. All air compressors flow less CFM at a higher psi. Once it is then compressed again thermally by the intercooler it goes into the engine which is then only accepting x cfm. Thats where pressure comes from.
Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
Originally Posted by PaysonPSD
Wouldn't this mean that the stock air filter can draw 700 cfm?
PMS: an obsession
Joined: Jul 2007
Posts: 804
Likes: 0
From: Kamloops
Damn, just a few months after the switch to the AIS. I'll be watching this close. I have heard that AFE filters are excellent. I'm waiting to see if they come with the Pro Guard 7. I kinda miss the Darth Vader sounds from under the hood 
Post Fiend
Joined: Nov 2007
Posts: 9,549
Likes: 14
From: Payson, AZ
Originally Posted by Tenn01PSD350
Theoretically, yep. Wonder why they failed so frequently? Nope. It has the surface area when clean but for how long?
