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Thanks for the comparison to Aquaholic! Rarified air there! PM sent

I did try 2 different size exhaust hoses as the Bun box terminates with 2 3/8 and the hull is 2 1/2. The 2 1/2 squeezed down fine onto the box so I went with that as opposed to fighting it onto the hull tube. One less battle. And these were just for fitting, I did change them to black.

With the chamber in finialed up the plumbing. The second pic is to remind me what I did for water injection.

Prior to installing the motor I did install reeds, flywheel, starter and bendix, cover and exhaust mani. Reed pics wound up next water box pics, the Bun does use the big snow mobile reeds. Had to make studs and nuts as supplied bolts were merely a suggestion.

And I had to polish the chamber which to be honest wasn't hard at all. It was very clean and unbeaten right out of the box. Same for the water box that I also polished.

Bun chamber installed. The Bun coupler is a battle, for me at least. The rubber is as thick as Sch 80 pipe, here's the Bun coupler next to piece of 4" Sch 80 I used for fitting.

From left to right settled on: Port 1 Top of Bun Exhaust Mani, Port 2 Bottom of Bun Exhaust Mani, Port 3 Pipe Water Jacket, Port 4 Exhaust Mani Injection, running a filter here because of the difficulty getting to, Port 5 To Bun Pipe Injection

With motor in place preliminary plumbing was done. Just trying different hose routing combos for what was best.

Once I had alignment straightened out one piece shim stacks were installed for one less wrestling match when pulling motor. It sure is a LONG way down to that coupler for aligning.

Drilled and tapped exhaust manifold for water injection. Pic is from the bottom looking up. That fitting is not to ever be seen again.

Ready to install Bun with starter, flywheel, intake and exhaust manifolds weight.

I'm running my O2T Zeel setup from my Bot/Phantom/898. Since I'm moving it to an unknown crank I did a spark test. Turned off the minus signal and just made sure it was firing where I was programming it to.

Before installing the Bun I gave it a push/pull pressure/vacuum test.

And the D gasket did pass the waxed parchment paper tear test.

I didn't use Tony's poured hood seal, I just used D gasket. Glued some sand paper onto a piece of it for a sanding block. Sealed the ends/joint with black 5200.

Mounting what I use for pissers. Quick disconnects that I use as flush connections. 4 off the head, 1 off the Bun pipe.

This damn build thread is taking as long as the actual build. All my other build threads were posted in one marathon session. Anyway, onward.

Thanks! And as far as scratches and dings, that's the "patina'! After the graduation pictures it's out into the real world! But I do like getting the pics, it's only a "New" build once!

Fit it all without lifting that motor in, lol. Tip of the day....use bed plates!

The manifold is 3/8 npt feeds on the ends and 1/4 npt for the ports. This let me run 1/2 barb x 3/8 npt feeders with 1/2 Tygon tubing feeding it. I made a tubing organizer from an even bigger piece of tubing that I wound up cutting with a wood blade. Don't waste your time with a razor knife or...