BB is shifted over. My SB with 4" and Victor Junior protrudes into the opening with a 2" drop housing.

 

The X-stream-lid will work great with the cowl hood,I had one on my 69 for years.Engine Masters show did a test on these lids & they do work.

 

Yes, it will work, depending on what intake manifold you have. I have a Weiand Stealth intake manifold on top of my 461 BBC with a stock 2” cowl induction hood and the standard factory drop base open element air cleaner base and it clears the hood no problem.

 

Thanks for the feedback guys!! Great!

I hear and read this and that:

- the Air Filter shoudnt protrude into the hood cowl because of stream interference vs: its an advantage

- X-Stream Filter destroy air stream (Better use closed ones) vs. they do work well

.. well ..

so i guess i just have to test myself.


What do you guys have to say about k&n's advice to have at least 1.5 inch distance between stubstack and air filter top to make it work?

Doesnt this requirement become irrelevant with an X-Stream lid since it allows air coming in direct above the stubstack? Thus 1 inch or even 0.5 of distance should be enough?

Anyone got some experience with this?




so tomorrow the 14x3 element arrives and i will check if the room situation allows for more.

I actually want a 14x4 filter cause it gives the stubstack some room.

But i want to use a 1 inch spacer as well..

So 1 inch spacer + 1 inch more air filter height might be too much?

Big block life is just big space problem life



Ok here is the video of Engine Masters testing 19 Air Filter combinations... the winner with gaining 3hp over NO(!)-Air-Filter:

A salad bowl :clonk:

just google:

Air Filter Horsepower Shootout! - Engine Masters Ep. 27

 

The lids are a waste and lose power. You can get a 1 inch spacer and a 3 inch filter, no way for 4 inch with the spacer

 

@1971ls6: yeah thats what i mean. Some make good, some make bad experience with these fitler lids.

I suspect its a matter of combination:
When making the lid a filter, you exchange that for flow across the base. This - in my mind - should only have positive results when there is room to breath ontop of the lid: cowl hoods. Whenever a standard hood is used with filtered lids, it should work counterproductive. Making the Carb/Air cleaner suck on the metall hood instead of only sucking in sideways, which is the only way in the first place. Thus just giving up flow potential.

The Engine Masters in Episode 27 made the same experience: Flow from above is better that across base, "as long as there is room/air". Since they tested on the dyno, this situation resembles rather an infinite large cowl hood.

So get this: They taped the 14x3 element off, forcing all the air only through the lid (giving up ALL the flow across the base), result: gain of horsepower. :surprise:

I will test my setup with and without filtered lid and experiment a little :stirpot: Once i get my AFR monitor i can see whats stabilzing and whats destabilizing air(/fuel) flow..

Thanks for your input!

 

what brand and part # 14x3 air filter does everyone use? I have a wix R filter which states race off road use only.
i looked for a 14x3.5 with no luck.

 

K&N or R2C Performance offer 3.5 inch heights

 

I’m using a K&N 14x4” filter element.

 

I used modeling clay on top of my filter lid. Made four pillars of it and closed the hood. It squished down when the hood was closed and I measured it.

 

Are you aware they make a 3-1/2" tall air filter element ?

https://www.summitracing.com/int/se...-style:round+air-filter-outside-diameter:14-000-in+air-filter-height-in:3-50-in

I have a cowl hood and I'm 99 percent sure a 4" tall filter will work if the base is a corvette type drop base.

BTW I hate the look of those filter-top air cleaners.

 

Ok some feedback (plus setup stats because everyting is important here)

67 Camaro
69 BBC 396
Edelbrock Performer Intake (Edelbrock Performer 2-0 Intake 2161 = 4.85 Carb Pad Height)
--> For comparison: GM 3933163 Original 68-69 BBC Intake = 5.0" Carb Pad Height
--> For comparison: Edelbrock RPM(Air-Gap) both: 5.22" Carb Pad Height)
Edelbrock 1411 Carb (Conv. to Manual Choke)
1" Spacer
69 Cowl Induction Base/Flange/Seal
14x3 K&N Filter + X-Stream Lid

Result:

Hood closes, but there is probably only 0.25 inch of room left at the top edge of the flange facing the radiator side.

I will try to bend it a very little bit down at the front facing side and then attach the flange seal to it.

I looked into the cowl from behind the main window and can the top of the filter. I guess it could fit a 14x4 filter but then in would almost touch the cowl roof. So i am gonna let it be like this

But i am gonna measure again to make sure..

 

You could go to a 1/2" spacer and use the 3.5" filter.

 

is an off set base needed to fit into cowl hood opening ?
it is not right above the carb area ?

 

actually it depends on the engine/intake/filter combination. I did some comparing among camaro shops.

Referring to stock intakes with stock 14x3 filter elements and the stock cowl hood air cleaner assembly it is like this:

A 350/327 uses a wide extension belt* between cowl hood air cleaner base and the flange part

A 302 uses a narrow extension belt*

A 396/427 uses no extension belt, since its already tall enough. Just Base + Flange

Hope that helps

*= of course you could replace the belt height by using a Carb spacer for example.
I got a BB so i ran into a little space problem.
As it seems, my Intake is 0.15 inch lower than stock and with my 0.85 thick adapter spacer (resulting in +0.7 inch over stock height) the hood juuust closes with no touching of air cleaner metal flange to hood.
But when i put the seal on it, i can feel the rubber pressing against the hood when closing.