Oval air cleaner for 427 FE?

[patrickt]

Originally Posted by AdamIsAdam

I took some measurements today and as expected, I can't get anything taller than what I already have. The center of the carb is so far back, MAYBE i can get something another inch taller. So Either I modify the lid like @undy did, it I do nothing. At least it looks cool as-is.

I do intend to dyno the car post-COVID-19, so I'll do a few pulls with and without the air filter so I know for sure what kind of HP I'm giving up.

What carb are you running?

[AdamIsAdam]

Holley 780 double pumper.

[saki302]

Years ago when I had my FFR, I made a dual panel top for my single carb.

It flowed MUCH better than the stock top. I think i bought twonhonds civic k&n panels on ebay and just glued them in with epoxy.

I wish I had kept that now ��

Now I'm running one of those small 9" k&n extreme filters.
Seems to work well enough, but I did have to hammer down the funnel base to flatten it and allow it to fit.

[Unique427]

Originally Posted by AC Ventura

Can anybody please advise whether this air cleaner: Ford Performance Parts M-9600-C302 Cobra Air filter, is suitable for a 427 FE with a Quick Fuel 780 please?
I'm not taking about fitting, more whether 1.75" thick is enough. Or advise a more suitable product. Thank you.

Here's a comprehensive air filter calculator.
Gives a snapshot of how filter shape, material and surface area size affect performance.

https://www.secondstrike.com/Technic...leanerCalc.asp

[AdamIsAdam]

When you look at that calculator, then watch Engine Masters AIR FILTER HORSEPOWER SHOOTOUT! Season 2 • Episode 27, you'll see there are major differences in HP loss depending on the lid, base, size and shape of the filter. Then you'll go raid the kitchen cabinets for an appropriate salad bowl to cut the bottom out of.

[undy]

At the time I did my setup SD made a filter that was 2 1/8" tall vs K&N's 1 3/4" tall filter and that's the one I used. That's a bit over 20% air flow without the lid filter. I'm running a KC 482" side-oiler so I need all the air flow I can get. My carbs are custom built Quick Fuel 750s.

[6TNCRZY]

If you want a low profile 14" round filter that flows well and looks "old school" this is what I have for my FIA. 1967 Camaro drop base (it has a deep drop and clearance for Holley float bowls), an aluninum AFCO top and a 3" filter.

[MaSnaka]

I have the oval filter with a single carb. Instead of cutting a lid for a rectangular element like Undy, I was thinking of the round top element with the center bolt down. I think it's 9" round by K&N. This was years ago but I never followed through with it. I now have a 445 which makes more power than I need and I have lost all interest in squeezing any more from it. Good enough. I did discover that with the 1 3/4" filter element, that a carb with the choke horn will drastically reduce air flow because the filter lid is almost making contact. So I did away with the choke horn. In SoCal the choke is not needed probably because of our superior blends of fuel.

John

[AC Ventura]

As original poster, I’ve now done some Rolling Road testing and confirm that with a 427 FE the 13/4” high filter, engenders a loss of 20hp. I’m going to order the taller version, 21/4” high. It’s border line clearance wise and if the bonnet won’t shut, will make a custom drop base to get another 5/8”.