air intakes

i was just wondering if anybody has made a pod filter intake/manifold that pokes out the side and forward like some harleys have?

 

I just took rhe pods off my bike after not being able to properly tune it. But I have seen it never asked anyone how it rode like that though.

 

I just took rhe pods off my bike after not being able to properly tune it. But I have seen it never asked anyone how it rode like that though.

 

what i was thinking was have the 2 left merge into one going out and the same for the 2 right. not sure if this is possible? so i would only have 2 pods. thoughts guys?

 

does anybody have any idea on what size of filter/pipe i would need? Doubling the area of a single intake for each side seems pretty large but is that what is nessesary? I was thinking of mocking one up in pvc then getting a fab shop to make them up nice and pretty.

 

Before you start heading down the Yellow Brick Road and think about modifying the Plants Intake; research and learn about what you are getting yourself into.

Many have been down the road before you.
There are some Fine Tuning issues that are difficult to attain resulting in experimenting with Kits and New Jets.

Before you deviate from Stock, ... Fine Tune it Stock with great attention to details finding an exceptionally good state of Tuning.
Arrive hear, ... first.

After you have Mastered the Fine Tuning that WILL provide you with terrific performance and a Base-line to return too if Mods present problems.

Don't get all giddy about how trick you can make it L@@K, ... before you get the experience of finding how well you can make it run.

 

I appreaciate the response. I have already tuned it up with a vac tuner and a colortune. I know what your saying though. I am in a very "pre" stage of this idea, just wanted to put feelers out there and see if anybody had any thoughts or ideas! any other suggestions?

 

Nope, nobody does............we all know better.

Dave

 

Get yourself a Genuine Yamaha Factory Workshop Manual.

For right now, ... best advice I got for you!

 

Come on man! where is the fun and adventure in that!

 

I have played around ith this idea the problem you run into is getting even airflow to all 4 carbs when you break it into 2 with the air coming in from the side the problem you face is one of the two will get more air than the other

 

hmmm did you increase the size of the pipe or did you keep it the same diameter as the intake of the carbs? I would think that as long as you had access to enough air that that would not be a problem? Thanks for the input

 

It's not "fun and adventure" we've tried it. You'll either get something half decent but not what your bike is capable of, Run your engine so lean you blow it up, or say screw this i wanna ride and put the airbox back in....

 

What Hellbilly said.
Remember that Harleys don't use CV Carbs, which is why you can do whatever you want to the filter intake and exhaust.

 

You might be able to work something up with some round slide carbs, but that would need some throttle cable and choke work. Not to mention trying to work up a carb rack.

 

If you have tried it, can you explain to me what you did and why it didnt work so I can get a better understanding of why it won't work? This is the first time I have experienced this much negativity on this site. Responses like "we all know better" and "it won't work" is not very helpful as to helping me understand why it will not work. Nothing is impossible and it seems to be that this should be a fairly simple Mod. Yes it will definatly be some trial and error but it seems that it should be just math to calculate how much room you need for the air. If I am wrong, can somebody please explain as to WHY?

 

So far with what i have been reading the "Vortex" created by the air filter cone does not create enough pressure for the diaphragm to operate correctly.

i am working on a bike that never came with the stock air box, it was supposted to be a parts bike for me... turned out to be a restoration build. now i am thinking combining intakes into 2, like you are saying. and adding a honeycomm in the tube to linearize the flow. so that it will still be smooth straite air, but comming from a pod filter and pointed tword the front.

 

ohhh so when the air goes through a pod, it turns into a "vortex", so my added the honeycomb it "evens/flattens" the air back out allowing pressure to be even and smoother? interesting, I never would have thought of that. would a normal application of pod filters not create the same "vortex" effect or is it because the length of intake is shorter it does not have a chance?

 

Not really a vortex.

There are a couple of variables in play. The big one is the air speed.

http://en.wikipedia.org/wiki/Venturi_effect

The restriction prior to the entry in the carburetor acts to make air move faster. Removing the airbox makes it slower. Slower air stream hitting the jet leading to the diaphragm changes the amount it lifts the piston. Less piston lift means less needle lift means less gas in the mixture, means lean running. Also, the amount of air hitting the carb can be changed by a crosswind with the pod on.

This is why velocity stacks were invented.

 

"Where's the fun and adventure, ... you say!"

Those who have gone before you have intimated that there is no fun and adventure.
The voices of experience should be valuable enough advice to guide you into avoiding an enormous hassle and getting you to get fine-tuned ... stock, ... before you begin trying to accomplish what they have already tried and found unacceptable results in one form or another.

We are all trying to get you to read the sign that says: "Danger. Thin Ice."