Above Left: After "reverse engineering" of the pump to determine feature size, placement and relative location, the adapter begins life as a block of steel and is machined into the finished device shown at the right.

At left is the Hudson 202 Jet oil pump (or the 202  "Hash" Wasp) with the same VFF adapter affixed. After painting and some plumbing, the pump/adapter combo is mounted on the engine (right). The original pump outlet port is plugged so that oil must flow into the VFF adapter. Pump output is now regulated by the VFF adapter and leaves the assembly through the adapter outlet port on its way to the filter, then on to the main oil gallery.

This particular unit (above) is on our Hudson Jet and has been in service for approximately 4000 miles at the time of this writing, 8/6/13.

At left is the VFF adapter for the 232-262-308 Hudson engines showing the mirror image relationship of the internal cavities. These are the two mating surfaces when the adapter is installed.

Above Right: Two prototypes of that version showing the business side and the pretty side.

Above is the VFF for the PDSC applications (most Chrysler Corp. Flathead sixes & eights). This photo shows the pressure regulator components. (typical of all versions)

Left: The VFF Adapter as installed on our Hornet 308. The adapter outlet plumbing is not yet finished in this photo. (tube at right is fuel)

Left: The VFF for PDSC mocked up on a Plymouth 218 block. This conversion requires drilling and tapping of the block on top of the pump mounting boss for re-introduction of oil into the passage leading to the main oil gallery (not shown). A special drill/tap alignment tool (shown below) makes this a fairly easy task.  

Below are a few photos of the three current prototype versions of the VFF adapters and installations. You will notice that a few shots show the adapter with the spin-on filter base directly attached. Although it makes a nice clean installation, it isn't a practical method in most cases. Remote mounting of the filter base is the most flexible arrangement allowing the filter to be oriented in the upright position and accessible for easy maintenance. 

At left is the drill and tap guide tool to create the new block entry port in proper alignment with the existing port.

At the right is the tool bolted to the pump boss with the aligning pin pushed into the original port. The axes of the pin and top guide intersect, allowing the new hole to perfectly intersect with the original passage.

 The original block entry port is tapped using the same guide fixture to permit installation of a 1/4 NPT plug. This is necessary to direct oil flow into the VFF adapter instead of directly into the block.


The new port has been pilot drilled, tap drilled and is now tapped for a 1/4 NPT fitting

U.S. Patent Pending


The new port has been pilot drilled, tap drilled and is now tapped for a 1/4 NPT fitting


These are the raw iron castings for the 232-262-308 Hudson (left) and the Chrysler PDSC engines. The inlet and outlet cavities are cast-in features as shown in the image on the right. The little notch near the end of the regulator bore extension is for an end-plug safety wire hole.

Below Left: Drill jig for the big Hudson version. This fixture assures that each part will be an exact duplicate of all others and that all subsequent machining operations will be in the correct relationship to the rest of the part.

Below Rt.: This is a proofing casting emerging from the surface grinder after receiving the mating-face finishing operation.

Above Left: Finished mating face. Above Right: Raw castings (front) and six with all machining completed (rear).  Drill jig (foreground) assures precise repeatability of the hole pattern. 


Close-up of the finished Hudson 232-262-308 VFF adapter (left) and changing out the prototype for a regular production unit on our '51 Hornet Coupe (right).

Final finishing of the regulator bore is done on the Sunnen honing machine, yielding a fine finish and the ability to hold very accurate hole size and straightness.  

Above and below: A VFF installation "mocked-up" on a 308 Hornet block showing the filter base in the former location of the stock mechanical fuel pump. This makes a nice compact installation, allows room for tappet chamber access and ample room to remove the filter at change time.  

 Below: Same set-up mocked-up on the Hornet engine in the car (without plumbing). If improved access to the tappet chambers is desired, you can simply remove the two mounting bolts and allow the filter and base to hang on the hoses, out of the way.