787 in a Kawasaki X2

[wfo speedracer]

This a project I started years back, it got sidelined due to floods and other business related issues and then parts were stolen off of it and sold by idiots hired by the property owner. At any rate the build is back on and progressing nicely now so I though I would share it here. I will be running a 787 engine with MSD TOTAL LOSS, AN R&D pipe, a VE racing head and an R&D power plenum all built on RFI cases. The engine you see in there now is just a mockup for fitment and alignment purposes. Lots of custom,one off parts, lots of absolute hair pulling insanity.

 

[wfo speedracer]

As you can see from the previous photos there's not much room. I had to start back at square one on the engine alignment I thought I was pretty close but alas it was not so. I grafted on a Seadoo pump tunnel , at the time I didn't have an alignment tool, I have since acquired one so it made sense to mock it all up and see where we stood. Not too bad off but I did see the pump needed to be shimmed up and the engines front needed to go down a considerable amount.

 

[wfo speedracer]

Pics of the seadoo pump tunnel glassed into the ski.

 

[mikidymac]

Very cool project.

 

[wfo speedracer]

Thanks here are a few more pics, as you can guess it really doesn't fit in there it sort of had to be convinced . I think I stretched the left bond line out about an inch and made a hollow tubbie for the pipe to clear. Hull is pretty much been swiss cheesed. I used a die grinder inside of a piece of PVC pipe to deafoam the hull fo the scupper and the resonator, very cool trick I learned from a buddy.

 

[wfo speedracer]

Hollow tubbie installed and a few pics of the bond line being stretched

 

[wfo speedracer]

You can see in this pic the pipe just clears the hull.

 

[wfo speedracer]

Seadoo pump tunnel glassed in

 

[wfo speedracer]

cooling line run and steering cable tube put in, and then it foamed

 

[wfo speedracer]

Here is a pic of it more or less together, it changes daily , I need to start installing stuff with velcro I guess

 

[wfo speedracer]

So today I was looking for a place to put the water regulator, on a Seadoo this goes on the waterbox, this ski has resonators and it sure won't fit there so I have decided to mount it where the nipple come out the top of the exhaust manifold.

Normal water routing is a tee off of the cooling hose from the pump to the regulator off of a small line, some of that water gets dumped back into the waterbox.

So what I want to do is mount it straight to the ex manifold with a close nipple, then use what would have been the in line to the regulator to go to the pisser and of course the other small line still goes to the pipe, if I can get the pressure right it will work this way.

 

[mikidymac]

You could just use a jet to tune the water getting dumped into the resonators just like in the Seadoo Factory Racing Handbook.

 

[wfo speedracer]

really not worried about the amount dumped into the resonators, probably the more the better , I have a Jetworks valve I can install there, I just want the pressure right so the regulator will function correctly.

 

[mikidymac]

I guess what I was trying to say is I understand wanting to keep the regulator but it isn't necessary if you don't have the room.
Back in the day it was illegal for racing so all the racers had to remove it. Per the Factory racing manual you tap the pipe fitting to accept a 150 mikuni main jet and the water box to accept a 200 main jet then just plumb them to the inlet waterline.

 

[mikidymac]

So today I was looking for a place to put the water regulator, on a Seadoo this goes on the waterbox, this ski has resonators and it sure won't fit there so I have decided to mount it where the nipple come out the top of the exhaust manifold.

Normal water routing is a tee off of the cooling hose from the pump to the regulator off of a small line, some of that water gets dumped back into the waterbox.

So what I want to do is mount it straight to the ex manifold with a close nipple, then use what would have been the in line to the regulator to go to the pisser and of course the other small line still goes to the pipe, if I can get the pressure right it will work this way.

If I am tracking this correctly I really don't think it will work...
So you want to run from the pisser fitting on the manifold into the regulator....?
This is going to be at a different pressure than would be on the inlet hose from the pump in the stock configuration as you would be losing pressure from the engine, head outlet and low level drains.

Then using the stock line to the regulator as the pisser would not tell you if any water is circulating from the engine, only that the pump is feeding water. Also when the valve opens and closes your pisser is going to go on and off too.

Also keep in mind that all the fittings and regulator have been calibrated by seadoo for a specific flow and that the pisser fitting on the pipe is also an air bleed as it is the high point of the system.

Not saying your idea wont work or is a bad idea but it would be much easier to go the racing way and use jets.

I think we were both overthinking this......The easiest is to just keep all the stock plumbing and just connect it with hoses and mount the regulator wherever you want and it still can dump in your resonator as the factory one does. Just change the close nipple on the bottom to a barbed fitting and run a hose to your resonator. There is no reason the valve needs to be hard mounted to any part of the engine or exhaust.

 

[Chester]

Have you thought about using an MSD water injection instead?

Chester