Upgrading from Dual Weber 32/36s to Triple 40 DCOEs – What else do I need?

[D Calkins]

I believe that you will. My stock distributor has two vacuum ports. My 123 distributor only has one. You will also need vacuum for the brake booster

 

[Ohmess]

Will I need to keep manifold vacuum for the distributor with triple DCOEs?

You need vacuum for the brake booster. The Korman intake manifold has take offs for manifold vacuum at cylinder 2 and cylinder 5. I've combined them for my brake booster using a simple brass T.

I have not programmed the use of vacuum advance with the 123. I experimented with it a little bit, but didn't follow through with it.

 

[Paulaner]

Yes, knew about brake booster vacuum but wanted to know if I should keep vacuum advance in place for the distributor. Sounds like I do. Anyhow, does anyone know if the Pierce manifold comes with a vacuum port off the front manifold section, or will I need to install a fitting?

 

[D Calkins]

One of the three manifold will have a larger threaded hole. This will be for your booster vacuum. I will be threading this into that hole. My carbs have a vacuum port that I will use for my 123 distributor.

 

[Paulaner]

@Ohmess do one of your carbs have the vacuum port for the distro?

 

[StephenZ]

Yes, knew about brake booster vacuum but wanted to know if I should keep vacuum advance in place for the distributor. Sounds like I do. Anyhow, does anyone know if the Pierce manifold comes with a vacuum port off the front manifold section, or will I need to install a fitting?

Yes , the Pierce has a threaded opening for vacuum.

 

[nzbeamer]

There is no vacuum advance on my set up.