Trying to wrap my head around this

[Quinc]

@tntsuperjet @TheBuzzard @#ZERO @waxhead

Saw these on a facebook page from a waverunner 1200 and been googling why anyone would do this in a two stroke or a 4 stroke. Is this some old forgotten tech or just some shade tree mechanic with too much time on there hands?

 

[SUPERJET-113]

What? You've never seen exhaust crossover tubes??

 

[zzylstra]

Whats even better is the guy claiming his 6m6 will put any 1000cc+ engine to shame

 

[augustaf]

Today is April 6 ...... not April1

 

[Quinc]

What? You've never seen exhaust crossover tubes??

So maybe an attempt at "balancing" the exhaust pulses the way an H or X pipe would on a car. Be interesting to know how it ran.

 

[SUPERJET-113]

So maybe an attempt at "balancing" the exhaust pulses the way an H or X pipe would on a car. Be interesting to know how it ran.

Actually, I was just joking and have no idea what is going on there.
Ive never seen anything like that in my 27 years of being around 2 stoke ski's(Yam, Kaw, Sea-poo). I think it would be good in the WTF thread...haha

 

[restosud]

i can tell you the connecting pipes are a bit too small.they should be exactly 63.5 thou larger!

talking from experience as all my cylinders are set up like that.

 

[TheBuzzard]

I've never seen it, but it looks like a guaranteed water leak into the exh ports. everybody knows that your ski runs like crap if the manifold gasket leaks and then there is the restriction to the flow factor. it cant work. probably why you see pix instead of the motor together. tweeker mod

 

[speedysprocket]

The head still goes on the top of the cylinder; adding those tubes won't allow you to wrap it around the exhaust ports...

 

[Pro-pulsion]

The head still goes on the top of the cylinder; adding those tubes won't allow you to wrap it around the exhaust ports...

Haaa, good one ol chap

 

[bored&stroked]

Its like crank windows yo, for less pumping loses due to pressures! Bbrrraaaaappppppp!

 

[Rushford_Ripper]

My guess would be some way to balance the exhaust?

 

[orangefinger]

There are parts missing.....
Exhaust port balancer and distributer flapper.
Inbetween the tubes within the exhaust port runs a little crossbar with a flapper .....this flapper opens when exhaust is being pushed out and closes right after to avoid anything going backwards into cylinder , they make a really cool sound like when you had the flappers on your bike on rear wheel. They used be installed in race skis that took advantage of the piston return spring which pulled the piston back to rapidly that exhaust was being pulled back into cylinder.


Will this count for April 1th still ??

 

[DAG]

For mounting the muffler bearing

 

[Quinc]

There are parts missing.....
Exhaust port balancer and distributer flapper.
Inbetween the tubes within the exhaust port runs a little crossbar with a flapper .....this flapper opens when exhaust is being pushed out and closes right after to avoid anything going backwards into cylinder , they make a really cool sound like when you had the flappers on your bike on rear wheel. They used be installed in race skis that took advantage of the piston return spring which pulled the piston back to rapidly that exhaust was being pulled back into cylinder.


Will this count for April 1th still ??

That sounded pretty good so I googled exhaust flap and they are thing.

"Flaps deflect the exhaust gases up onto the intake manifold, which is mounted to the (2) studded rectangular plate. This heats the intake fuel/air mixture to provide a more volatile combination(?). Once the system begins to warm, the thermosprings weaken and the exhaust gases push (close) the flap to allow the exhaust gases to exit the manifold directly"

 

[DAG]

I alsways wanted a nice and warm low density fuel charge

 

[farmski]

I tell you what! That right there boys is tubular horsepower!! That there been a secret since yall been knee high to a grasshopper!!!!

Sent from my SM-G800R4 using Tapatalk

 

[bored&stroked]

I thought the saying was knee high to a duck?

I alsways wanted a nice and warm low density fuel charge

When its freezing out and driving on ice requires a steady, non surging throttle application, yes you do.

 

[Davidomilligan]

Whats even better is the guy claiming his 6m6 will put any 1000cc+ engine to shame

My Seadoo 3d will put any standup to shame

Sent from my XT1650 using Tapatalk

 

[tntsuperjet]

That gives me a whole new perspective to a pipe dream.
Bet that motor runs great Till you put it in the water