Hi, all.

A quick and basic question. Several years ago the vacuum advance on my 240Z got wonky and so I disconnected it. Recently the distributor itself has gotten wobbly, so I bought a remanufactured distributor. For the life of me, I don't remember where to connect the vacuum advance. I have a likely tap blocked off on the balance tube, but there is also a tiny vacuum tap on the front carburetor that I have sealed up with 3M electrical tape (only -- not on the back and it's different from the connection to the top of the float bowl). However, it is so small that the usual vacuum advance hose, i.e., one that fits the advance mechanism, is way too large for it.

So, now that I'm about to return to the land of the vacuum advanced, where do I hook it up?

Chris

There should be a tube on the front carb right behind the dome - where the casting mounts to the manifold.

I have capped off the vacuum port on the front carb and run my vacuum advance to the balance tube.

Edited April 5, 201411 yr by AlexS13

  AlexS13 said:

I have capped off the vacuum port on the front carb and run my vacuum advance to the balance tube.

Is there a reason that you wanted to be way way advanced at idle?

For my particular setup I have noticed an improvement by doing this. The engine under light load / part throttle driving is much more responsive.

  jfa.series1 said:

There should be a tube on the front carb right behind the dome - where the casting mounts to the manifold.

Ahhh. It was what I had called the "tiny" vacuum tap on the carb. The walls of it were thicker than I remembered and I had no trouble hooking up an ordinary vacuum distributor hose to it.

Thanks much.

Chris