This flow bench is being developed by a master Harley-Davidson mechanic from Charlotte, North Carolina Harley-Davidson. It's based on professionally manufactured units, but Pablo is adding additional tooling to improve the ability for this unit to test heads. Once the unit is complete we will see top ends studied. We'll begin to understand how headwork is critical to performance.--Bandit

This flick shows the inside of the lower plenum with top plenum partition removed. This looks inside from the top of the main lower cabinet that houses all the vacuum motors below this bottom plenum.

The photo above shows inside the cabinet from the back side. This is showing the back of the lower plenum and also the mounting of the relay switches that fire up the vacuum motors.

This shot depicts one of the air valves, in it's seat, partially open.

Here are the switches, with the bezel in place, on the exhaust side air valve bushing.

This is the left side intake door shown open. The door was made out of .060 thick aluminum. Door opening is 8 1/2 x 11 inches.

Here's the air opening's of the vacuum motors mounted in center divider of the lower cabinet. The four motors are mounted in the center. The other holes are drilled but blocked off with aluminum plate for additional motor capacity, 12 total.

The last shot shows how I mounted the four motor's on the center partition wall. The original plans had the motors glued to the partition. I wasn't comfortable with that assembly, so I came up with (garage engineering) brackets that allow me to service the motors if need be. Also they won't fall off during operation. The motors are fairly heavy. Gluing just seemed like B.S. to me. I know that some commercial flow benches glue their motors in place. Cheap bastards!!

--Pablo

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