Oil Pan Plenum

Small Plenum opening directly onto the oil pan.

Aluminum Plenum flanges installed

Aluminum flanges were added to the plenums so that the plenums would not need to be fastened directly to the hot heads. Later in the build, the pop rivets were replaced with machine screws so that the front 2/3 of the plenum could be easily removed

Cobra_head_front

Front view of cobra head modification. A vane was added to help smooth flow of air into the carb. The vane runs the length of the cobra head and extends about 1 inch into the carburetor throat. It seems to have helped even out the CHTs and EGSs between

Cobra_head_rear

Rear view of the modified cobra head

Cobra_head_side

Side view of the modified cobra head

Oil_Pan_input

I put two 1.25 inch holes on either side of the shark's tooth. They empty into a rectangular plenum about 4 X 2.5 that is terminated about 1/4 inch in front of the oil pan. The pan has cooling strips and the outside air contributes to oil cooling.

New_Cowl_02

Another view of the lip on the cowl.

New_Cowl_01

New lip on cowl. A hole 14" X 7" was opened in the cowl. A piece of 4" PVC was used as a mold to form a lip on the edge of it, the idea being to create a low pressure area.

Right_Plenum_front

Right Plenum, Front View

Right_Plenum_installed

Right Plenum, both portions installed

Left_Plenum_Rear

Left Plenum, Rear portion.