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Author Topic: Bread Box air filter ?  (Read 9116 times)

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Offline Eddie

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Bread Box air filter ?
« on: January 06, 2012, 05:26:38 AM »
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Offline 78whiteorbs

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Re: Bread Box air filter ?
« Reply #1 on: January 06, 2012, 06:34:13 AM »
honda chopper guys could probably speak vloumes on 'em.

check out hondachopper.com
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Offline steam-powered man

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Re: Bread Box air filter ?
« Reply #2 on: January 06, 2012, 02:23:24 PM »
insufficient airbox volumn / inadequate distance to the throat inlets doesn't allow proper laminar flow just prior to the airbox "v-stacks".  result is a reduction in performance potential.  they look kewl tho, my k8 had one.

intake kewlness is inversely related to performance

                                                              street
                       kewlness factor          performance
stock airbox              0                               10
breadbox                  5                                 5
pods                         7                                 2
v-stacks                   10                                0

(the above is a midwinter, light-hearted opinion.  no flaming, pls!)
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Offline seanbarney41

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Re: Bread Box air filter ?
« Reply #3 on: January 06, 2012, 02:32:28 PM »
yeah, the general consensus I've heard from guys running 'em is that they are actually more restrictive than the stock airbox which balances with the smaller plenum volume and incorrect  v-stack length to net no significant jetting change or power gain (I would guess power loss at most rpms)
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Offline Eddie

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Re: Bread Box air filter ?
« Reply #4 on: January 06, 2012, 04:50:39 PM »
Good to know.....think I'll pass.   love this forum.
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Offline Grnrngr

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Re: Bread Box air filter ?
« Reply #5 on: January 06, 2012, 05:21:56 PM »
Heh..glad I saw this post, just put one on my bike but haven't run it yet. Came with a basket case bike I bought along with a lot of other chrome pieces, only a few of which are still usable. Air filter looks OK tho, so I put it on, stacks were old and crackly so I have to repair at least one crack with some RTV but I'll let ya know how(if) it works. Fortunately, I have one of Tintop's custom air filters on the way if this one doesn't perform, meantime, I can clean up my stock box in case I decide to use it again. Hmm...if stack length was a problem with the originals, wonder if Tintops stacks can be adapted to work with it? maybe a wider perfed band? couldn't be too hard to make that..and painting the perfed part another color could add to the cool factor..
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Offline seanbarney41

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Re: Bread Box air filter ?
« Reply #6 on: January 07, 2012, 07:24:23 AM »
only problem is the proper length v-stack will be smushed against the back of the box....or close to it
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Offline the technological J

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Re: Bread Box air filter ?
« Reply #7 on: January 07, 2012, 08:00:32 AM »
wow i bought one for 10 bucks off a guy.. i was gonna replace the pods on my KO with it.... you think its restricts the airflow by much
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Offline seanbarney41

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Re: Bread Box air filter ?
« Reply #8 on: January 07, 2012, 08:15:14 AM »
naw...just a little bit
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Offline Retro Rocket

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Re: Bread Box air filter ?
« Reply #9 on: January 07, 2012, 04:23:20 PM »
Quote from: the technological J on January 07, 2012, 08:00:32 AM
wow i bought one for 10 bucks off a guy.. i was gonna replace the pods on my KO with it.... you think its restricts the airflow by much

It will be better than pods simply because of the stacks....
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Offline Rookster

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Re: Bread Box air filter ?
« Reply #10 on: January 07, 2012, 04:56:05 PM »
Never tried pods so I can't compare them to the breadbox but I can compare the breadbox to the stock airbox.  I used a breadbox with stock airbox rubbers (stacks).  They were very close to the back of the box and I couldn't get decent acceleration when I cracked open the throttle.  I cut the stock stacks back quite a bit and there was virtually no change in acceleration.  The breadbox simply doesn't have enough volume.  The stock airbox gave great acceleration with no dead spot.  I did go from 115 mains to 120 with the breadbox and there was no change.  After that I just decided it wasn't worth it.  I will say the breadbox looks fantastic and really opens up the motor but for going fast it is very limited.  Just my experience.

Scott
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Offline seanbarney41

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Re: Bread Box air filter ?
« Reply #11 on: January 07, 2012, 05:10:14 PM »
I have ridden with a guy on here who is running one and his bike seemed quite capable...might try pm'ing Dave the Welder for Breadbox carb set up help...he's a good guy
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Offline Grnrngr

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Re: Bread Box air filter ?
« Reply #12 on: January 07, 2012, 07:02:17 PM »
I'm gonna look around for some perf, see if I can't make the box bigger. Shouldn't take more than some wider perf and longer bolts to make it work right, or at least better that it is. Might go to the stock stacks as well, since they're in better shape than my "breadbox" pieces.
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Offline seanbarney41

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Re: Bread Box air filter ?
« Reply #13 on: January 07, 2012, 07:07:53 PM »
that sounds like a good idea, let us know how it works
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Offline Grnrngr

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Re: Bread Box air filter ?
« Reply #14 on: January 07, 2012, 07:13:47 PM »
Heck, I'll even take pics.. :D
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'72 CB750-K2 "PopCycle"
'73 CB750-K2 "Barney"
'77 CB750A   
'83 Virago 500 (red)
'83 Virago 500 (black)

"and so on and so on and scoobydoobydooby..oooooooshasha"  Sly Stone

Offline splitt

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Re: Bread Box air filter ?
« Reply #15 on: January 07, 2012, 09:20:42 PM »
I run one on my bobber with no issues. I did this trick to prevent the cross-draft problems that these breadbox filters are known for.

http://www.lowridersbysummers.com/twt/13/index.html
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Offline Scott S

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Re: Bread Box air filter ?
« Reply #16 on: January 27, 2012, 04:54:21 PM »
 Ndstrylgrnrngr, did you ever figure out another filter set-up for the 'box?

 Split, good to hear those mods work....think I'll give it a shot. I'm a stock airbox guy  all the way, but this is a sweep the floor build and I'd like to make this work.
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Offline Grnrngr

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Re: Bread Box air filter ?
« Reply #17 on: January 28, 2012, 07:45:05 PM »
Sorry, haven't had a chance to get down to Lowes or Home Depot yet, it's on my list for this week tho..
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'72 CB750-K2 "PopCycle"
'73 CB750-K2 "Barney"
'77 CB750A   
'83 Virago 500 (red)
'83 Virago 500 (black)

"and so on and so on and scoobydoobydooby..oooooooshasha"  Sly Stone

Offline grcamna2

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Re: Bread Box air filter ?
« Reply #18 on: January 28, 2012, 07:49:14 PM »
Quote from: steam-powered man on January 06, 2012, 02:23:24 PM
insufficient airbox volumn / inadequate distance to the throat inlets doesn't allow proper laminar flow just prior to the airbox "v-stacks".  result is a reduction in performance potential.  they look kewl tho, my k8 had one.

intake kewlness is inversely related to performance

                                                              street
                       kewlness factor          performance
stock airbox              0                               10
breadbox                  5                                 5
pods                         7                                 2
v-stacks                   10                                0

(the above is a midwinter, light-hearted opinion.  no flaming, pls!)
+1 Steam powered  ;) I like that comparison chart.
« Last Edit: January 28, 2012, 07:53:11 PM by grcamna2 »
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Offline Scott S

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Re: Bread Box air filter ?
« Reply #19 on: January 30, 2012, 06:40:33 PM »
 I'm thinking about getting four of the inner air box boots (the non-angled ones) and using them. I think I'll have to trim the stacks just a little to keep them from being too close to the top.
 The '77-78 550K boots are longer. What if I gave them a try? That would increase the runner length.
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Offline Grnrngr

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Bread Box air filter ?
« Reply #20 on: February 04, 2012, 11:54:42 AM »
Went to HomeDepot last night, the perfed metal sheets are about $33, so it'll be a little while before I spend that on  $10 airbox...unless I can find some cheap/free material...
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'72 CB750-K2 "PopCycle"
'73 CB750-K2 "Barney"
'77 CB750A   
'83 Virago 500 (red)
'83 Virago 500 (black)

"and so on and so on and scoobydoobydooby..oooooooshasha"  Sly Stone

Offline Xnavylfr

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Re: Bread Box air filter ?
« Reply #21 on: February 05, 2012, 11:34:58 AM »
If you use the breadbox you will want to put some kind of cover over the top. when you end up riding in the rain ,the rain will run down the back of the tank and drip right in the filter.
I ran a breadbox on a 78 F model engine in an AMEN SAVIOR frame and I had to block off the top half to RESTRICT airflow, I was already running pods, so a rejet wasn't needed.

as said before a lot of HONDA CHOPPER guys use them without any problems!!


Xnavylfr(CHUCK)
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