High flow a/c?
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Stellar HDF Member
Joined: Sep 2015
Posts: 2,008
Likes: 259
From: Seattle
High flow a/c?
I am seeing a lot of threads with people talking about their build and getting great results. Problem is when they post the parts of their build they just say "high flow a/c". Can I just go with any? From why I have read they all provide the engine with more than enough air flow....
Seasoned HDF Member
Joined: Sep 2009
Posts: 17,138
Likes: 6,161
From: SE Michigan
No, it really doesn't. Unless you choose a Kuryakyn Hypercharger. Then we have to question your judgement.
Outstanding HDF Member
Joined: May 2015
Posts: 2,172
Likes: 377
From: Georgia
This begs the additional question.
Do you even need a high flow air cleaner?
I've read in more than one place that the stock air cleaner flows more than enough air for most stage 1 and 2 applications. Bit I have never seen any documentation showing what the stock air flow is.
Why should I spend $$$$ on a HF cleaner if the stock one provides the engine with what it needs?
Do you even need a high flow air cleaner?
I've read in more than one place that the stock air cleaner flows more than enough air for most stage 1 and 2 applications. Bit I have never seen any documentation showing what the stock air flow is.
Why should I spend $$$$ on a HF cleaner if the stock one provides the engine with what it needs?
Grand HDF Member
Joined: May 2008
Posts: 4,624
Likes: 189
From: Newcastle, Ca.
This begs the additional question.
Do you even need a high flow air cleaner?
I've read in more than one place that the stock air cleaner flows more than enough air for most stage 1 and 2 applications. Bit I have never seen any documentation showing what the stock air flow is.
Why should I spend $$$$ on a HF cleaner if the stock one provides the engine with what it needs?
Do you even need a high flow air cleaner?
I've read in more than one place that the stock air cleaner flows more than enough air for most stage 1 and 2 applications. Bit I have never seen any documentation showing what the stock air flow is.
Why should I spend $$$$ on a HF cleaner if the stock one provides the engine with what it needs?
You dont have to, its all about what you want.
KN filter compared to Crusher Street Sleeper III. The KN is good enough til ~ 3,700 rpm.
Stock Rushmore filter compared to FM's hi flo a/c.
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Ultimate HDF Member
Joined: Jun 2007
Posts: 9,193
Likes: 494
From: Richmond, VA
I run the S&S Stealth high flow. Very happy. $112.
If there is an obvious notable difference over the factory unit, it's noise. The open element systems without the backing unit, are a lot louder when you crack the throttle. I liken it to flipping the air cleaner lid on old carburetor cars.... back in the day. You hardly notice it with loud pipes, but with the stock exhaust, it's pretty loud.
If there is an obvious notable difference over the factory unit, it's noise. The open element systems without the backing unit, are a lot louder when you crack the throttle. I liken it to flipping the air cleaner lid on old carburetor cars.... back in the day. You hardly notice it with loud pipes, but with the stock exhaust, it's pretty loud.
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Seasoned HDF Member
Joined: Feb 2009
Posts: 5,641
Likes: 1,985
From: Cleveland Zoo
Everybody sells their stuff with claims and dyno sheets to back up better than stock air flow. My Stage 1 runs good with all stock air cleaner or with the K&N replacement I put in, maybe if I change cams and do head work I'd use the different housing like a Fuel Moto because I like the looks of the stock cover.
On a Stage 1 bike the performance difference might be there but I can't feel it with just an air cleaner change.