HandlePole INTAKE enough???

CarterB

CarterB

X
Location
orlando
Wondering if using one large or two smaller tubes through the handle pole is enough air for the motor? I made my own hood and dont really want to have any holes in the hood. Also is there any disadvantage to having only front exhaust and no rear?
 
CarterB

CarterB

X
Location
orlando
do you know this from experience? technically the tubes are about the sizes of the carbs and the engine compartment is equivalent to an intake plenum so it sounds really reasonable. But i'll take the advice from someone who has a lot more experience than me:)
 
Speedfreak

Speedfreak

Location
So. IL
If the air tubes are the same size as the carbs then they will need to be the same length also. It will be harder for the carbs to draw air through the tubes since they are so long. And this will make your carbs way too rich because of decreased pressure. It would be like wanting the ski to perform flawlessly underwater.
 
Speedfreak

Speedfreak

Location
So. IL
I know that you wasn't connectiong the two.. Try this..... if the a tube (your carbs) will flow X amount of air at a given pressure. Then if make that same diameter tube 10 times the length then it won't flow the same amout of air at a given pressure.

Where are the math guys on this one..
 
CarterB

CarterB

X
Location
orlando
not being a dick SpeedFreak but your english is making it hard to get your point and you are not providing any math for me...
think about a car or anything that uses a long intake/snorkel...doesnt really change things.
 
Big Kahuna

Big Kahuna

Administrator
Location
Tuscaloosa, AL
the breather tubes are only there to assist when your ski goes under water.... not to provide enough air for the motor to operate...... otherwise if they did then you would see Wamitons, XFT, Watecraftfactory, 24-7(Chris Maros), Blowsion, WaterdawgKustoms would all be building hoods without air intakes........... Most recommend adding a pole breather to go with their hoods if you are doing flat water freestyle.......
 
subnsxr

subnsxr

Location
Long Beach, CA
I have the RRP with two intakes, not enough. I had to open two spots on the rear of my hood. The angle of the air tube in the pole almost looks blocked when riding, they are very hard ti fit in. I'm running dual 46BJ's and all bolt ons and porting. SXR
 
Speedfreak

Speedfreak

Location
So. IL
CarterB said:
not being a dick SpeedFreak but your english is making it hard to get your point and you are not providing any math for me...
think about a car or anything that uses a long intake/snorkel...doesnt really change things.
Click to expand...

I know. I am not a physics teacher but I done a bunch of research on this back about 10 years ago when I was building speaker boxes. The turblance inside the tube restricts the flow of air. It will take more pressure to flow the same cubic foot of air through a 10 foot by 3 inch tube then a 1 foot by 3 inch tube.

Does that make since? I looked for a formula but couldn't find it. I have a guy that knows this stuff I will ask him to see what formula to use for fluid volume and transfers.

If you could get it worked out I think it would be great. I wouldn't mind doing it also. But without flow rates you would need 2 2inch tubes to be the same size as a twin 48mm carbs. 2 1.5 inch tubes for twin 38's Is there even 4 iches between the pole bracket?
 
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