Topic: Pod filters has anyone thought of doing this?

[winkster2005]

OK I know pods can be a touchy subject but after looking at some exhaust tricks I had an idea. My latest 750 has a completely open 4 into 2 exhaust and while looking for a way to put a baffle of some sort in it I came across the "lollipop" method. This is where you weld a washer on a nut inside the exhaust to create backpressure. This made me start to think. I was thinking about putting pods on my bike because my boots are hard as a rock. What if you got a washer or made one that is the same outside diameter as the carb and then slipped the pod over it and the carb. This would put more of a restriction on the carb, thus eliminating  the excess airflow from the pod but allowing you to have the look of a pod.

What do you guys think?

[firebane]

Something breaks.. or fails and you are now sucking metal into your engine.....

[winkster2005]

Well I would be using something probably 1/8" thick so I wouldn't be too worried about that.

[Mantree]

Or just rejet for pods

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[winkster2005]

I would have no problem rejetting because I'm pretty sure I need to for the exhaust. But I thought the pods had too much flow even if you rejetted. Maybe I'm wrong, I'm still trying to learn when it comes to carbs.

[enwri]

What if you got a washer or made one that is the same outside diameter as the carb and then slipped the pod over it and the carb. This would put more of a restriction on the carb, thus eliminating  the excess airflow from the pod but allowing you to have the look of a pod.

What do you guys think?

Not sure if you'll get any replies from the anti pod people about this one. Their minds would have short circuited reading those last two lines. Sorry.

[Don R]

  Guys have used plastic cut from a round bottle inside the pod and tape on the outside to make a restriction. It isn't all about restriction because some pod filters block the air bleeds on the carb inlets.
   I think much of the pod frustration is caused by guys that want pods to work but aren't willing to do the carb work needed and they repeatedly ask what to do.
  It seems the breadbox filters work well with little or no rejetting. That's curious too.
  I've been in some discussions over the years and i've never tried pods except the cb400F I bought with them. it ran great on 1/4 choke so I put it back to stock.

[Mantree]

I have run pods on 2 cb750k with no problems.  That said you realy want mechanical carbs as the cv carbs don't play nice with pods, they can be made to work but you are better off with mechanical carbs.  The pods are nice when you have to pull the the carbs off.  Just don't forget to filter your valve cover vent.


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[Retro Rocket]

You aren't understanding how carbs work, ior the job of the airbox in combination with the rubber velocity stacks. The airbox is there to supply air with a minimum of turbulence, the velocity stacks smooth out the air as it enters the carb throat, you can't stick something into the carb throat and expect it to work, a carb works in complete reverse to a pipe, there's not even a hint of comparison sorry...

[harisuluv]

You aren't understanding how carbs work, ior the job of the airbox in combination with the rubber velocity stacks. The airbox is there to supply air with a minimum of turbulence, the velocity stacks smooth out the air as it enters the carb throat, you can't stick something into the carb throat and expect it to work, a carb works in complete reverse to a pipe, there's not even a hint of comparison sorry...

Yeah pretty much. 

If you want pods for "more performance" or higher air flow, it would seem silly to then restrict air flow directly from air intake.  Seems counter productive to the idea of the pods in the first place.

[Retro Rocket]

You aren't understanding how carbs work, ior the job of the airbox in combination with the rubber velocity stacks. The airbox is there to supply air with a minimum of turbulence, the velocity stacks smooth out the air as it enters the carb throat, you can't stick something into the carb throat and expect it to work, a carb works in complete reverse to a pipe, there's not even a hint of comparison sorry...

Yeah pretty much. 

If you want pods for "more performance" or higher air flow, it would seem silly to then restrict air flow directly from air intake.  Seems counter productive to the idea of the pods in the first place.

I didn't want to get too deep into it, its all on the forum...

[calj737]

Retro makes the point perfectly. Its about controlling the turbulence of the incoming air, or Laminar Flow. Member mkoski (I think) toyed with making laminar plugs to insert into the pod boot to perform the proper flow control while taking advantage of the greater volume of air. He's since gone on walkabout after that, but to me it was the best idea I've seen on making pods actually work as intended.

But you can with effort, tune your bike to run well with pods.

[winkster2005]

I think my confusion was because I thought the carbs would only draw as much air as they needed. So as long as you supply the proper amount of fuel by jetting that the pods would work. But after reading multiple discussions about pods I felt like the only time someone actually got them to work was when they put tape on them to restrict the air flow.

[calj737]

Regrettably, that is a myth or at least a major misunderstanding of air flow. What they may have encountered was a better A/F mixture since they didn't do the requisite tuning for proper jetting. So its possible they ran better, but they would still be running like sh!t compared to how the stock configuration performs. A dyno with an Exhaust Gas Analyzer would tell the tale exactly. "Butt" dynos are arbitrary and rhetorical. Absent of a true dyno run, you should intend to perform numerous plug chops with fresh plugs, spend the time to fully acquaint yourself with your carbs, and get a vacuum synch tool to help you get them balanced (a proper Dwell meter for timing too). This effort will get you close and probably very acceptable.

[winkster2005]

Regrettably, that is a myth or at least a major misunderstanding of air flow. What they may have encountered was a better A/F mixture since they didn't do the requisite tuning for proper jetting. So its possible they ran better, but they would still be running like sh!t compared to how the stock configuration performs. A dyno with an Exhaust Gas Analyzer would tell the tale exactly. "Butt" dynos are arbitrary and rhetorical. Absent of a true dyno run, you should intend to perform numerous plug chops with fresh plugs, spend the time to fully acquaint yourself with your carbs, and get a vacuum synch tool to help you get them balanced (a proper Dwell meter for timing too). This effort will get you close and probably very acceptable.

So you think of I got some jets, spare plugs, and a set of vacuum gauges that I could make pods work?

[calj737]

You can make them work "well". But understand, they will never be "as good as" stock. Will you notice a difference riding casually on the street or for fun? Probably not. But you will have small "flat spots" and some minor irregularities as a result.

[70CB750]

You can make them work "well". But understand, they will never be "as good as" stock. Will you notice a difference riding casually on the street or for fun? Probably not. But you will have small "flat spots" and some minor irregularities as a result.

And if you get caught in real rain, you might have some stories to tell later. 

[calj737]

Yeah, like; "What I did while to pissed down rain..."

[winkster2005]

I hope I didn't piss my money away on these things lol

[strynboen]

they Work vell on kompressors.
.i just put one on..after have broken the plastic filterhousing on my thepy small kompressor

..other..?? vho have used them ,and have a positive resultat..

[riffman12]

forget pods, if I had the funds to blow I would try this:

https://cognitomoto.com/collections/new-products/products/cb750-air-intake-box-sohc-and-dohc





I wonder how well it creates equal pressure.

[strynboen]

they dont have the lengh of the orginal rubber stacks..so turbolens is just as bad as the poor pods..but looks cool vith that cnc made vriting..think its more a wrench monkey brat performange thing..looks over funktion..and preisy
looks like they crunch the studs on the kaburetor bu spanning that bolt..to sqvze them on the rack

thek Photo..it just dont have the right facon in the intake..to form the right tubelent free intake flow

[przjohn]

Why not just by new rubber stacks if the old ones hardened up?

[70CB750]

I made my own for Dorothy, it worked great.

http://forums.sohc4.net/index.php?topic=99066.0

Just a flat piece of 6061, stem from sunbrella, radiator hose and Purolator A30059.

forget pods, if I had the funds to blow I would try this:

https://cognitomoto.com/collections/new-products/products/cb750-air-intake-box-sohc-and-dohc





I wonder how well it creates equal pressure.

[Scott S]

Why not just by new rubber stacks if the old ones hardened up?

 This.
 It would be much cheaper and less painful to just get fresh rubber.