vaccum advance.

[mtlman8]

on a 1967 tr4a from the distributer,where does the vaccum line end??? there is a port on the crossover bar at the manifold and one at the bottom of the 1st carb. carbs are zenith stromberg 175 cd.

 

[HerronScott]

That should go to the port on the carburetor. The port on the intake manifold is for the PCV valve.

Scott

 

[mtlman8]

thanks scott,but i'm not talking about the pcv port...(i don't think) thats the large port for the gulp valve.the one i'm not sure about is the small port in the center of the crossover.between the carbs.

 

[poolboy]

Is the vacuum module that you want to connect to a vacuum source on the radiator side of the distributor or the cockpit side of the dizzy ?

 

[mtlman8]

radiator side.from the advance to...i don't know where. i think it could be on the bottom of the carb or the intake maifold. where is it on your tr4a irs?

 

[poolboy]

No, I have a TR6. I just wanted to be sure it was an advance module. It needs to be connected to the carb.

 

[HerronScott]

thanks scott,but i'm not talking about the pcv port...(i don't think) thats the large port for the gulp valve.the one i'm not sure about is the small port in the center of the crossover.between the carbs.

The vacuum advance line from the distributor should definitely be connected to the carb.

The only port that I'm aware of on the intake manifold is the one for the PCV valve in the crossover. Although I've got SU carbs on both of mine, the intake manifold should be the same and you can see the connections in the picture below. Note that on the SU's the vacuum advance port is on top of the front carb where it sounds like it's on the bottom of the Strombergs.

Do you have an additional port in that crossover and if so, can you post a picture so we can see it?

Scott

 

[TR3driver]

Should be a small port, on the bottom of the front carb I believe.