I was warned about the frog ones but I had them on hand and put them on. I couldn’t even make it around the block before I had to take them off. What do yall recommend? Function is probably more important than looks!
Good air cleaners are generally big air cleaners. The filter needs a lot of surface area to both flow well and clean well.
Love that one. Thought about making a custom one like that but it’s low on the priority list. I’ll look into that style. Thank you.
I thought about doing that. I am still Running the bug screens. Maybe I’ll just remove the “filter” and run like you do.
If you like the looks of small air cleaners, buy a couple K&N filter elements for them. A friend had a '39 Ford coupe with a stock 59A in it, and couldn't figure out why it ran so poorly...it was the cheap clogged Mr. Gasket air filter.
I have a pair of the O'Brian Truckers tall filters for my Plymouth, only running one till i install my dual intake. It is the same diameter as the small ones, but much taller. Under the mesh is a k&n style oiled cloth filter. It seems to flow plenty of air for the RPM my flathead sees, I felt like i could feel a difference over the standard 4" louvered filter that came on the car.
If you look here, https://wixfilters.com/Lookup/FilterBySize.aspx filters are by size. When you click on a filter you like, most show the cfm of the filter. Figure out how much air you need, then you will know just how big of a filter you must have.
I bought a k & n style air filter for a Porsche that had a 3 barrel Weber on each end of the engine.Bought at a swap meet for $20 and made my own bottom and top to accommodate the Edelbrock slingshot intake with 2—Stromberg 97 carbs that I had jetted UP from stock jets(.045) to .048 and ran h-10 champion plugs that had a nice light tan to light brown finish on the plug centers after running on the street and eventually at the drags. My 32 Henry cabriolet fender less hiboy ran 80 in the 1/8 mile with s—10 5 spd,and 3:89 Detroit locker in a nine in ford rear. I would say the length and tallness of the Porsche k & n filter contributed immensely to the overall performance of the less than 250 in flathead.
My vote for best flowing air filters is K&N. When I built a 327 for my coupe a few years ago I did the calculations for surface area needed for the engine. I found a filter x2 that provided that. I machined the filter housings to fit these filters. I had the engine on the dyno and after the break in and tuning the last pull was with the air filters on. The tq/hp numbers did not change. Sold me.
Can you post a pict of your frog scoops? Normally, they have no filter. Curious how it was choking out the motor.
K&N, it has been proven time and time again on the dyno. Watch David Vizards video on these filters , he explains how and why they flow so well.
Our air cleaners that we offer on our website have proven to have excellent flow. We run k&n elements Here is a link to the video where I flow test them We have them available on nystromperformance.com Made here in the USA
I’ve had good results when using nylon hose material over the carbs mouth and then place a frogs mouth over it to hold in place. They last a long time.
I have the same Grace & Co housings. They ran just fine on my run stand, I haven't tried them under load while driving, but all they have is the wire, so not physically restrictive in appearance.
Had to Google Grace & Co. Never have come across their stuff (knowingly at least). Really like the copper plated look.
They're made by Gear Drive Speed and Custom, who I've used for various intakes and valley pans in the past. Looks like they just released a new offering as well: https://www.lakeheaders.com/products/41-style-air-cleaner
I ended up going with the repop Edmunds air cleaners since I purchased an Edmunds intake. Got both paper and washable filters for them.
I’m running the Edmunds like yours with K&N elements when I run with the hood on. There is no difference when running no element
Strombergs do not vent the bowl to the carb throat. The vent is the little slot for the accelerator rocker spring. A restrictive air filter will richer up the mixture as the bowl will have more pressure than the throat. The original filters were called silencers. That is all they did. The vent not in the throat is also a source for fuel leaks. On hard acceleration, fuel can just come out the vents. I have seen carbs modified with tubes added going from the bowl to the throat.
On “low” performance street engines on weekend cruisers anything would be ok and many are attractive on an engine. For continuous performance the filtering surface needs to be a lot larger and the looks may not be what your looking for.
The Jalopy Journal
