Could someone explain to me the best way to set the timing on a carb car with a vacumm advance. I have a timing light with the dial on the back. Just looking for the best way. Thanks

 

Step 1: set the light down.

Step 2: adjust the timing as far advanced as it will go without pinging.

Actually, you can use the light; a good starting point is to disconnect the vacuum advance and set it for about 36° BTDC at 3000 RPM. That should get it close to the setting as described above.

 

How do you go about check the total timing. I would like to know how much mech advance is added and how much vacumm advance is added how do I go about checking this. I know you can change the spring and weights in the dis to change the amount of advance and the curve but I am wanting to check what I have know before I start changing anything. Thanks

 

Total timing: disconnect the vac adv, hold the throttle at 3000 RPM, and use the dial-back function.

To determine the curve produced the springs & weights, look at the timing at idle; then slowly increase the RPMs until you see advance beginning to occur; then continue to observe the advance as RPMs increase, until the advance stops increasing.

To measure vacuum advance, hold the throttle open to about 3k with it unplugged, then plug it in and see what it does.

It's all so simple... just think about it for 2 seconds or so, it's pretty much basic and obvious.

 

That is what I was thinking but I just wanted to check. I will check what I have and go from there. Thanks again