123 Ignition Vacuum Adv, Learn me on some vacuum |
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123 Ignition Vacuum Adv, Learn me on some vacuum |
nditiz1 |
Jul 11 2018, 06:59 AM
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#1
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Senior Member Group: Members Posts: 1,177 Joined: 26-May 15 From: Mount Airy, Maryland Member No.: 18,763 Region Association: MidAtlantic Region |
Ok so I'm currently running the 123ignition dist on my 2056 with dual webers. I read the instructions and don't understand the mapping. I also don't know how it all works together. Can someone educate me on the vacuum adv and what curve would be best? As the rpm's increase it creates more vacuum thus creating more adv, but if I already have a curve setup to go from 12 degrees at idle to 28 degrees at 3000+ will the vacuum adv move the timing even higher once it is hooked up and mapped?
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nditiz1 |
Jul 11 2018, 09:09 AM
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#2
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Senior Member Group: Members Posts: 1,177 Joined: 26-May 15 From: Mount Airy, Maryland Member No.: 18,763 Region Association: MidAtlantic Region |
I'm not sure why Webers shouldn't use vacuum when they come from the factory with vacuum ports.
If I am going to use it I will only be using the vacuum port on cylinder 4 (off the carb) with an anti-pulse valve. I'm getting the info from John of ACN. Currently the carbs vac port is capped, but the dist is open (McMark - Never cap the vac port on a distributor) |
bbrock |
Jul 11 2018, 09:25 AM
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#3
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914 Guru Group: Members Posts: 5,269 Joined: 17-February 17 From: Montana Member No.: 20,845 Region Association: Rocky Mountains |
I'm not sure why Webers shouldn't use vacuum when they come from the factory with vacuum ports. If I am going to use it I will only be using the vacuum port on cylinder 4 (off the carb) with an anti-pulse valve. I'm getting the info from John of ACN. Currently the carbs vac port is capped, but the dist is open (McMark - Never cap the vac port on a distributor) (IMG:style_emoticons/default/popcorn[1].gif) Once again, I am wrestling with the same questions as you. I bought a Bosch 050 long ago with the intention of using with my Webers but now wondering if something with vacuum would be better. For your setup, I'm wondering why you are thinking of just using one port instead of Teeing both carb ports together for a better signal?? I don't know enough to know what, if any advantage there would be. Just curious and will be watching this thread closely. (IMG:style_emoticons/default/bye1.gif) |
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