Civvy Distributor Timing

[rboltz]

When you use the civilian distributor, with vacuum advance, on the 230 engines, where do you set the timing?

[Barrman]

6 degrees with the vacuum line un hooked.

[brute4c]

5 degrees BTDC, just like the mil engine according to my Jeep tuneup manual.
You must unhook the vacuum line to get it right...then when you are done, hook the vacuum line up while you have the light on the timing scale and the timing should change quite a bit...that way you know the vacuum advance is working at least.

[rpgdeity]

Rboltz, what carb are you running on ur 230? 1 or 2 barrel? Where are you hooking your vacuum advance line to?

[archjr]

I don't know if this matters, but my vacum advance is hooked up front on the ports next to the thermostat housing. I'm curious if someone has it in a different location.

[rpgdeity]

yeah, thats what I've been trying to figure out. I've been told (and in my head it makes sense) that you can NOT hook it up to manifold vacuum, it must be hooked off the vacuum from the venturi of the carb, but I can't find any ports to go off of with my 2-barrel holley carb. Basically, it has to be a port "above" the venturi correct? The port that sucks air from the valve cover is the same as manifold vacuum, so that won't work.