Oh well
Heavy Breather type forward facing ACs
Road Warrior
Joined: Sep 2016
Posts: 1,634
Likes: 578
From: Cape Coral Fl
you mean you never took the air cleaner off a 454 Vet . Or off of a 6 cyclinder Duster and hammered it ?
Grand HDF Member
Joined: Aug 2020
Posts: 4,798
Likes: 5,889
From: Knoxville
Road Captain
Joined: Jul 2020
Posts: 592
Likes: 482
From: SE PA
Always wondered if these heavy breathers exhibit some slight bit of ram air effect at higher speeds, or at least the ones with the filters with the open center design.
Have a factory ram air Firebird and another car with a ram air system effectively connecting the throttle body directly to the front grills via a smooth path, but cant say Ive had a way to measure it at high rates of speeds. Id like to think its more than marketing but who knows.
Between a potential ram effect? and longer runner design, perhaps theres a reason Im seeing some race bikes with this style air cleaner. Maybe its just because the larger filter area, I dunno.
Have a factory ram air Firebird and another car with a ram air system effectively connecting the throttle body directly to the front grills via a smooth path, but cant say Ive had a way to measure it at high rates of speeds. Id like to think its more than marketing but who knows.
Between a potential ram effect? and longer runner design, perhaps theres a reason Im seeing some race bikes with this style air cleaner. Maybe its just because the larger filter area, I dunno.
Last edited by MattLS6; Feb 8, 2023 at 06:26 PM.
Seasoned HDF Member
Joined: Aug 2017
Posts: 5,562
Likes: 4,759
From: Albuquerque, NM
Yeah, if it was mine, I'd keep it, and see how it runs. You might decide you like it.
HDF Community Team
Joined: Aug 2018
Posts: 3,070
Likes: 1,229
From: New Hampsha
All filters create some resistance. Granted, there is a point of diminishing returns, but any resistance will reduce manifold pressure, and thus power.
Last edited by John CC; Feb 9, 2023 at 07:54 PM.
Road Warrior
Joined: Jun 2017
Posts: 1,705
Likes: 1,017
From: Lawrenceville Ga.
Thread Starter
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Seasoned HDF Member
Joined: Dec 2005
Posts: 19,928
Likes: 8,030
From: poway
So you are saying an air filter reduces vacuum?
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Tourer
Joined: Sep 2018
Posts: 458
Likes: 282
From: West Virginia
I have a heavy breather on my SB. I've never hit my leg on it. As far as rain goes, got caught in mild showers for about 70 miles last summer with no sock and didnt notice any issues. I like the way it looks on my bike, but I'm a bit of a chrome *****.
Last edited by SmokeyHill; Feb 10, 2023 at 03:58 AM.