If you check the site that I thought I'd made clear in my original post, you'll find it pretty easily!

 

Just because it "works" doesn't mean it's better. Case in point: the "new" blue CPS from a couple of years ago.
The point, as I see it, is that 530's, being from a higher horse engine, are probably over-engineered for our application. At any rate, you can't just throw them in our application by themselves and get good results. We know they will "work", but throw them in an engine with a stock turbo, fuel system, and HPOP and you won't get very satisfactory results. The 6637, being engineered for a lower horsepower engine, may be under-engineered for our application. See the point?
So why do people continue to do modifications with no evidence there is actually a "gain"? I suggest that many of the "modifications" don't actually result in a gain, other than the warm fuzzy feeling that the person doing the modification gets from doing it. In other words, a way to waste time that you feel good about. The 6637 is a great "feel good" mod because the modifier can immediately hear a dramatic difference. It must be doing something if you can hear a difference, right?

On the other hand, I have always been willing to concede that the 6637 is most likely superior to the poorly designed stock intake. It is also the cheapest and easiest intake to install. But when there are clearly superior alternatives, that are more quiet, that don't fall off, that filter better, and that may flow more air, it seems to me the 6637 receives more press time here than it deserves.

 

Yeah the original post you had a question mark on there as if you weren't sure of the model number. That's why I posted what I did because for some reason it wouldn't let me cross reference numbers so I could check flow rates.

 

That's why it receives so much "press time". It's better than the stock intake setup, and it's the cheapest intake mod you can find. For those on a budget, it's better than nothing.

BTW, I do run what you may or may not call a "superior alternatives, that are more quiet, that don't fall off, that filter better, and that may flow more air" with the AFE Stage II and ProGuard7 filter media. I also ran the 6637 filter for over 2 years. The difference? Sound. That's all it was. The filtering abilities of the 6637 kept my intake perfectly spotless. More than I can say for the drop in K&N filter that I made the mistake of putting in my airbox when I first bought the truck. That one leaked dirt and dust all through the intake because it wouldn't seal properly (and before you say it was the fault of a broken airbox consider this - the stock paper filter elements fit perfectly in there without leaking).

By the way, have you run the 6637 filter on your truck? Or are you bashing it just because? I've run the stock filter setup, the stock airbox with the K&N, the 6637 filter, and now the AFE Stage II. I think from real world experience I would know what works and what doesn't. And on top of that, I won't bash a filter setup that I've never used, for example, the AIS.

A gain doesn't have to be related to horsepower. In the case of every single air filter setup out there, none of them alone will provide any gain in horsepower. If you have a heavily modified truck and you are still running the stock airbox, then that airbox has become a restriction and reduces your power. Adding an aftermarket intake to support your other mods is a restoration of power you should have to begin with.

When people on these forums ask for opinions on air filters, I won't tell them that they will gain any power from an aftermarket intake (any brand name or DIY). I will tell them what's available, prices, and pros and cons of each. The pros and cons usually involving price, noise, looks, filtering abilities, etc.

 

Ok I ran the dyno today with the Tymar, AFE, and open element. Wanted to know for myself what was what so here are the specs:

3 runs with the tymar netted:
1st run on #2=413.7rwhp
2nd run on No2=481.1rwhp
3rd run on No2=481.3rwhp

3 runs with AFE stage2 netted:
1st run on #2=407.0rwhp
2nd run on No2=473.1rwhp
3rd run on No2=472.9rwhp

3 runs with open element netted:
1st run on #2=424.9rwhp
2nd run on No2=493.1rwhp
3rd run on No2=492.3rwhp

 

Guess the Afe isnt as good as the Tymar. BTW, open element sounds saweet

Cowboy Steve

 

just wondering how many CFM`S can be pulled through that 4 inch piece of pipe on my 6637 filter?

 

Looks like the 6637 is more than enough for our trucks. Which filter media are you running on the AFE Stage II, is the standard or the Proguard?

 

I dont own the AFE setup just to clarify. I made a deal with him that if the Afe out performed my tymar I'd buy it(Thanks for the ideer Tim) sad to say the guy was shocked. He's gonna get a tymar setup for his 7.3 now, go figure

The Afe intake used the proguard 7 filter. It was all brand new so the neigh sayers thinkin it was a dirty filter can squash that idea right here.

The Tymar performs well, bottom line. Proofs in the puddin

Cowboy Steve

 

To start with I wasn't aware I was "bashing" anything. As I have said before, just trying to provide some balance to the discussion by offering a different point of view and what I have learned about the 6637 rather than simply cheerleading the 6637. If that is "bashing" then hand me a baseball bat. I also will not promote any particular intake (although I am very impressed with the Donaldson powercore media), they all have their good and bad points.

To answer your question, I have run a few different intakes, but no open element filter has or will ever be on my engine while I own it because of other concerns I have with them that are somewhat unique to my situation. Yes, I am prejudiced against open element air filters of any kind, if that makes my opinion less valuable, so be it. I have been around a lot of diesel powered farm and construction equipment and have never encountered any that utilize an open element filter system. Seems to me that there is probably a reason for that.
That being said, I have frequently driven 2 different 7.3l pickups equipped with a 6637 style filter and am not impressed with it. That is probably due to my prejudice against open element filters.

 

sweet, i guess i was correct, 400 buckeros will get me a lifetime of 6637 or i can change them every year for next 10 and still be ahead,
anyways, like i say Bigger is Better, most of the time, and this time too,
i ran stock box- my impression, it sucked
AIS - with my mods i was strugling for air, and nothing could stop my filterminder to get sucked in under heavy throttle. driving under normal circumstances was fine and i dont have anything bad to say about it, i would keep it if not my power adders
6637 - i love it, dont have any drone and ran 1/4 mile with no problems

 

ROFLMAO! That's awesome.

 

Thanks. I thought of that all by my self.

 

A lot, check here https://www.ford-trucks.com/forums/649731-air-filter-data-please-post-yours-here.html for the CFM vs Restriction for a 30-ft long 3.5" dia pipe.

 

Looks like this backs up my findings.