2 stroke exhaust design

[jetski9010]

I found this while searching around on youtube. Do you guys think something like this could be made to work for a jet ski or can you already get enough change in the sonic wave speed from just injecting water or restricting water?

 

[the WaTeRhAwK]

 

[egbrig]

While great in concept, it would be way too complicatied to perform reliable in our harsh enviroment. Keep it simple, paddling in suks.

 

[waxhead]

They used to do something simillar on karts till they banned it

 

[2XLR8]

Water injection would accomplish similar results. You would shorten the pipe to where it would perform best at high rpms and use the water injection to lengthen the tune length for better torque.

 

[the WaTeRhAwK]

Water injection would accomplish similar results. You would shorten the pipe to where it would perform best at high rpms and use the water injection to lengthen the tune length for better torque.

thats what the thing in post #2 is for.....

 

[tor*p*do]

thats what the thing in post #2 is for.....

post #2 is blank on my screen . . . .

 

[WFO Speedracer]

Post #2 is blank in Travis's head also.

 

[chriselmore_1]

lol

 

[the WaTeRhAwK]

post #2 is blank on my screen . . . .

....


this was a split design between me and motorheads. the slug in the center has a pisser hole drilled down through the center keeping water at a minimum, and the rest of it is like a mesh. when the water pressure increases, it moves forward off of the conical area and lets a full flow of water through until it reaches the other end at the conical area and restricts the water back down to a minimum.

spring pressure controlled mechanical water injection.

 

[Dustin Mustangs]

The way you have it drawn it would never open. You need a surface for the water pressure to act on if you want it to push open the valve. Maybe you intend to have the id through the slug is smaller than the id leading to it which would work but it isn't shown in the drawing. Speaking of which, it would be nice to be able to change the size of the closed and open condition orifices with different sized pills.

Seems like this would be a bit light-switchy tho. ECWI ramps up and ramps down to smooth out the effect. I would consider that pretty important. Make the bypass holes through the case as apposed to through the slug and you could stagger the openings so they open (and close) one by one as the slug moves through its motion.

This could be a pretty cool product if you do it right!

 

[the WaTeRhAwK]

yes, it does have a much smaller diameter hole .it will open under the correct amount of pressure created, adjustable by twisting it in or out, either increasing or decreasing the spring pressure against the slug, just like a jetworks flow control valve, except functionally the opposite.

the outer bypass holes are a good idea. kinda like heart bypass surgery. the thing is though once it reaches the other end of the device under full input pressure, it needs to shut the water off back down to a minimum, just like at idle pressure.

 

[Dustin Mustangs]

Right, so at the low pressure end the slug would be blocking the entrances. At the high pressure end it would be blocking the exits. In the middle (red) it would block none. As it moved it would slowly open them one at a time till all open (red) and then slowly close them one at a time until it hits the end.

 

[the WaTeRhAwK]

good job with the angles. nice and straight : )

 

[2XLR8]

How is it going to work when you are riding hard in choppy water? Since it is not rpm regulated and only water pressure regulated. If the water pressure drops and or quickly spikes up and down in the chop and your engine is doing 7000 rpm plus. I dont think you want that thing opening and closing at these rpms.

 

[the WaTeRhAwK]

I don't know, we'll just have to see...lol I have an experimental boat or two to try it out on, may have to lengthen the chamber a bit, or whatever? :dunno:

 

[waxhead]

I don't know, we'll just have to see...lol I have an experimental boat or two to try it out on, may have to lengthen the chamber a bit, or whatever? :dunno:

The extractor system on it ???

 

[the WaTeRhAwK]

The extractor system on it ???

no, the injector's case. : )