Thanks--the "swirl coefficient" would, I assume, reflect the buffeting effect from the air stream having to make the transition from horizontal to vertical. If that is so, I would assume that the "X-Stream" filter tops we have been discussing here, which in effect have filtration material on the top of the air cleaner, would offer reduced buffeting since they would already be presenting airflow in a downward/vertical direction.

http://www.knfilters.com/search/prod...x?Prod=66-1101

While not exactly the same as I used on my GTO, here's a Mr. Gasket product that does look similar:

http://mr-gasket.com/ProductDetails....txtSearch=2085

I see the "glass-fiber" filters flowed best, but obviously they would be a poor choice for a high-mileage street engine. NASCAR engines are rebuilt after each race, so if any fiberglass should find its way into the cylinders, it would not present that much of a problem.

Great article, thanks!

Cheers from Dugly :cool:

OK guys, here's where I am with the project.
I am including "before" and "after" pics. I had a metal spinner do the tooling for a 9" flat base, out of .050" aluminum material. The pics are my prototype, so it's a little rough.
As you can see, the base is FLAT with a turned-up outside edge and 5-1/8" center hole. The next challenge was the outside edges hitting the float adjusters. I made a small round notch on each side and it dropped right on!!
It still sits on the carb lip, so it doesn't touch any parts of the carb. I don't think the air filter is compromised at all by the small notches.
I believe that this is the absolute lowest baseplate available for a 4150 carb!!
I have now been able to triple the filter area previously being used (with an x-treme top), without cutting into the hood for side clearance. It all fits under the bottom of the hood profile. If I clearance my hood scoop opening a mere 1/2" on the sides, I could go even taller!!

The .050" material could be anodized as well.

So, how much interest out there?? I have the tooling done and can pop some out if there is enough demand. I still have to figure out my costs, but I'm not trying to make a killing. I'm just glad I solved my problem!!
:3DSMILE:
Any feedback, suggestions etc are most welcome.

Thanks!

Michael

Sorry to follow up on my own post, but maxxed out on pics.
Here is a pic of the plate sitting on the carb...

Looks good, Michael! I'm curious, in pic #5, the item on the left is your new flat plate, the center item is the old Stellings base, and the item on the right is the K&N base, right (on second thought I see the old Stellings in the background, what is the center item in photo #5)? The difference between my old "aftermarket" base plate and the K&N looks very much like the difference between the center and right items in pic #5.

Looks like pic #3 shows a bit greater height, how much clearance do you have when you close your hood? I went to WalMart and got some clay from the toy department, put wax paper on the top of the air cleaner, then put clay "globs" on the various points around the air cleaner and at the center of the air cleaner, then wax paper over everything and just closed the hood, measured how thick the globs were after they were squashed down by the hood. I have between 1/8" and 1/4".

Would you mind posting a photo of the flat base, showing the notches you made to clearance the float adjusters (I assume your DP has center-hung floats, right?)? I know that a flat base will not work on my Edelbrock carb, but as I have said I foresee a small (600-650 CFM) Holley DP with center-hung floats in the future for my 5.0 HO engine. I'm just curious if the "notches" you put in the base might provide an entry point for unfiltered air.

[EDIT--never mind, I can see clearly in pic #4, and I didn't even see the second posting at all....clearly just a small notch on the outer edge of the base plate, no unfiltered entry at all, GREAT!]

I think your setup looks GREAT! When I get ready to change out my intake manifold, I plan on downsizing the round filter to a 2" high model, that will give me the .75 inches I need without lowering the engine/transmission. If I want more, then I need to deal with convertible motor mounts and transmission mount and the resulting effect on the headers, not sure that would be worth it. The X-Stream filter top is a great idea (I wonder if there's any information regarding how much additional air it will flow), not to mention that the air entering the scoop will be "rammed" right down onto the filter top. I don't run a turkey pan, but that doesn't mean I don't want to!!

Cheers on a great solution, Michael!

Oh, yeah....any idea of price? I wouldn't need anodized, but if that were the way they were offered I would still be interested. I might also be interested in one without the reliefs for the float-adjusters, might be able to modify it to fit my Edelbrock and get an additional 1/4" of clearance (that's the "height" of the flange on the bottom of my current base plate)--that would allow me to run the 9" X 2 1/4" K&N filter.

Dugly :cool:

I' surprised with the Wix. 100% flow, no restriction ?
Wix 46945R 14x3 Glass 860 CFM 100% 119

What is the glass filter ?


46945R Click to enlarge PAPER AIR FILTER 14X3.ASPH.
WIX RACING FILTERS 46945R

Price: $30.95


--------------------------------------------------------------------------------

Description of WIX RACING FILTERS 46945R
WIX-46945R......PAPER AIR FILTER 14X3FLOWS 1000+ CFM ASPHALT............Principal Application: Racing Applications Only Style: Air Filter Service: Air Media: Batt/Fiber Height: 3.010 Outer Diameter: 14.000 Inner Diameter: 12.250 Ends: Plastic

Michael,

I'd be interested in your base. I bought an extreme from Jegs similar to yours for my new 496 KC FE that's being built. I'm putting a Victor single plane manifold on it but Keith is cutting the carb platform down a 1/2 inch but still might need a base like yours. By the way, who's turkey pan is that?

Looks very nice Michael.

I wonder what the flow difference would be between that filter and the Cobra oval air cleaner assembly ?

Hey, nice work.

[quote=YerDugliness;1074061]Looks good, Michael! I'm curious, in pic #5, the item on the left is your new flat plate, the center item is the old Stellings base, and the item on the right is the K&N base, right (on second thought I see the old Stellings in the background, what is the center item in photo #5)? ......

Dugly,

The one in the middle was a Mr Gasket baseplate that came with their 2" paper filter package. Yes, the one in the back is my old 8" Stellings....

Cheers,

Michael

Gary,

The base is now available. There is another thread with pics and pricing here:
http://clubcobra.com/forums/showthre...hreadid=106363

Can't recall where the turkey pan came from. If it comes to me, I'll let you know....

Michael

Did you post a picture of the S&H original base versus your new version? I've seen so many posts that I'm no confused. Thanks.

RodKnock,

Sorry to confuse. I probably shouldn't have started a new thread when they were done and available (will accept my flogging from the moderators!).

The pics are up in #42 of this thread.

RodKnock,

Here is the comparison you asked for. 8" Stellings vs 9" flat base plates.

I'm interested. What is the part # for the x-treme filter?

If I miscalculate on my Kirkham, then I dent aluminum. I would probably use play-doh first, but has anyone field tested yet?

Do you have paypal? PM payment details. Thanks.

I will PM you on payment. Paypal is ok.
Mickmate (Nick Acton) already has one and field testing. He posted about it here: http://www.clubcobra.com/forums/show...35#post1075035

I am running it on my car now with the Extreme 9" top (Part #66-0901).

Increased filter area from approx 25 sq. inches to between 80 and 90, depending on the height of the filter used and still fitting inside the turkey pan. That's a big and noticeable difference!

K&N offers quite a few filters of 9" diameter...here's their search link:

http://www.knfilters.com/search/appsearch.aspx

Go to the right side and click on "Search for filters by Dimension", then click on the 7th category down, "Round Air Filter".

For dimension A (OD), choose 9" from the dropdown menu.

For dimension B, leave it blank, as well as dimension H.

I got a lot of hits, the tallest I found was 3" and the shortest was.....well, I didn't check them all, but you get the idea. They are available with a "thickness" dimension of 1", 1.5", and 2", maybe more, I didn't check further.

The X-Stream Filter top is available separately, looks like black is your only color choice there:

http://www.knfilters.com/search/prod...x?Prod=66-0901

I'd bet there will be adequate range in the height dimension that you won't need to worry about denting that gorgeous Kirkham hood up!

Cheers from Dugly :cool:

Anyone know the proper K&N 9" OD round filter, either 2" or 2-1/4" tall, that fits the xstream 9" top?

Hi Jeff,

Via email, I sent you the listing of all the K&N 9" air filters from 2" to 4" tall. Also includes the listing for the 9" Extreme top.

I would post it here, but the smallest I can get the PDF file is about 400k and CC does't seem to like attachments that size.:confused:

Good luck!;)

Thanks Bernica. Really appreciate all of your help.

There are a lot of good spun aluminum ones available through Circle Track suppliers. The Corvette one has too many protrusions & bumps that would ultimately inhibit the air flow. I think you are attempting to fit a 9" drop base into a tub thereby resricting any percieved improvement. Make a choice, good aiflow or originality?