2.0 Vac ports and 123 Distributor, Which to use? Options

[Olympic 914]

OK another vacuum hose thread.

Just got my car running again after 4 months down, and during this time I got in on the 123 distributor GB.

My engine is a 2056 with the 2.0 FI and two port throttle body. I have the dizzy set on position #1 which is used for the vacuum advance. and this is the port I have hooked up. (green arrow - A ) and I have blocked off port B



It did run okay but not real enthusiastic, which makes me think I hooked up the wrong vac port on the throttle body. Is port B the advance port?

Previously it had the stock dizzy with both vacuum lines hooked up.

right now it is just static timed at 5 deg btdc using the led built into the 123 dizzy.

what benefits are there to using the vacuum port for advance VS using the retard port and the corresponding setting in the dizzy?

Fortunately I can access the dip switch in the dizzy without removing it. (I think)

Hopefully Beat Navy will wade in on this subject since I think our engines are set up similar.

[Olympic 914]

I think he means A (in my picture) the retard port on the throttle body, not the port on the dizzy

[914_teener]

I think he means A (in my picture) the retard port on the throttle body, not the port on the dizzy

My suggestion is to do what Beat Navy (Rob) did. He has the same motor as you. As I understand it he used the retard port and changed it to a different curve in his post

However he did use another setting as I read it. I'd just follow the directions to the tee in the manual and check it with an adjustable timing light.

I still have the original 1.7 in my car. I used the suggested setting in the manual capped the retard port at the TB and used the advance port at the TB to the dizzy and checked the timing with a light. Of course I set the static timing first and plugged the two ports and the TB before that.

You have the exact set up I am going to...a 73 TB with a 2056.