Re: Fuel system
Posted by HH56 On 2023/2/7 18:53:17
Here is the basic wiper vacuum line routing. Note that the long stretch usually rides just above the oil gallery and is clamped to special pipe plugs that have tapped holes for a screw and clamp to be added. You will need to figure the routing and fittings needed to get to the hidden inlet port. Original tubing was 1/4" steel.
On the short curved outlet line to the intake manifold, the drawing shows a 48-50 manifold with a port at the front. On later manifolds the vacuum port is in the square section under the carb at the rear so the line basically follows behind the manifold assy and goes to that location.
EDIT: Since you will need some fittings for the ports rather than try a hard metal to metal tube connection as was done on this pump, follow the later pumps like the one in the following posts and get hose barb fittings that will convert the threaded port to a push on hose barb and use short pieces of rubber vacuum hose to connect to the tubing. I don't remember the thread size on the pump ports but it is either 1/8 or 1/4. I think 1/8 so see if 1/8" NPT to 1/4" hose fittings will work for the vacuum connections. 7/32 vacuum hose should be found at most parts stores and will provide a snug fit on the tube and fittings.
Attach file:
wiper vacuum supply 48-50.jpg (85.48 KB)
On the short curved outlet line to the intake manifold, the drawing shows a 48-50 manifold with a port at the front. On later manifolds the vacuum port is in the square section under the carb at the rear so the line basically follows behind the manifold assy and goes to that location.
EDIT: Since you will need some fittings for the ports rather than try a hard metal to metal tube connection as was done on this pump, follow the later pumps like the one in the following posts and get hose barb fittings that will convert the threaded port to a push on hose barb and use short pieces of rubber vacuum hose to connect to the tubing. I don't remember the thread size on the pump ports but it is either 1/8 or 1/4. I think 1/8 so see if 1/8" NPT to 1/4" hose fittings will work for the vacuum connections. 7/32 vacuum hose should be found at most parts stores and will provide a snug fit on the tube and fittings.
Attach file:
wiper vacuum supply 48-50.jpg (85.48 KB)
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