SU HIF38 Plumbing/Pipes Diagram

[svenedin]

A diagram of the various pipe connections to the SU HIF38 carburettor courtesy of Declan Burns. This diagram is referenced but lost from many old threads on this forum.

As I understand it, there are left and right versions of HIF38s with the version with most connections opposite the exhaust downpipe being more desirable in a Minor.

Stephen

HIF38 Vacuum advance.jpg.jpeg (356.19 KiB) Viewed 2358 times

HIF38_plumbing_GB.jpg.jpeg (105.57 KiB) Viewed 2358 times

[Sleeper]

Would help knowing what open/extended, A , B are?

John ;-)

[svenedin]

The tube labelled open/extended is an overflow from the float chamber so it can be left open as a breather or extended with a drain pipe.

A and B are some kind of economy system that weakens the fuel mixture at constant motorway speeds.

Stephen

[Sleeper]

I think B (A in red ) is the distributer vacuum advance

John ;-)

[panky]

The inlet elbow can be kept as the Mini air box will fit with a simple modification. The vac advance port is shown in the first picture

[svenedin]

I think B (A in red ) is the distributer vacuum advance

John ;-)

That's on the first picture on the top.

Stephen

[Sleeper]

Yes.

John ;-)