Chuck wrote:

Here is a photo of my plenum chamber with 180 bends inside to take advantage
of the dynamic charging effect. I tried enlarging the openings in the bends
but never did get as much power as with the simple bell mouths made of
nylon. I took the bends assembly out and put the bells back in.
I never did understand how this was supposed to work. It looks like the
pulse charge would want to go into the box and out through the throttle
butterfly rather than into the other rotor. Perhaps my runners are too long,
but it would be really tough to make them any shorter, no clearance at top
of engine.

Chuck Dunlap

You cagey guy Chuck. You never told us about this interesting experiment :-)

To shorten them I think you are going to need to change the oil filler
pipe and dip stick location. I think it can be done if you keep the height
down to 2  inches and make it deep like you did with the one you have.
I don't think you need to shorten it much.

You could always make one of my wrapped up versions for the other
side of the engine and redo your oil cooler plumbing :-)

Paul Lamar
 
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