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: 1,165 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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Mblizzard |
Oct 29 2018, 06:27 AM
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#2
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Advanced Member Group: Members Posts: 3,033 Joined: 28-January 13 From: Knoxville Tn Member No.: 15,438 Region Association: South East States |
Phil
Don’t worry about the curve numbers. Set using the dizzy your max advance to be 27 at 3500. If your can’t get a good idle or it lacks power then change the curve. So if you use B and lack power or it seems to be running poorly then go a curve that brings the advance later. I was running 2056 so the B curve worked best but regardless of which curve you use set it so max advance is in at 3500. If your nozzle on the throttle body has vacuum at idle then it is a retard. If it has vacuum on opening the throttle then it is advance. |
DRPHIL914 |
Oct 29 2018, 07:35 AM
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#3
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Dr. Phil Group: Members Posts: 5,753 Joined: 9-December 09 From: Bluffton, SC Member No.: 11,106 Region Association: South East States |
Phil Don’t worry about the curve numbers. Set using the dizzy your max advance to be 27 at 3500. If your can’t get a good idle or it lacks power then change the curve. So if you use B and lack power or it seems to be running poorly then go a curve that brings the advance later. I was running 2056 so the B curve worked best but regardless of which curve you use set it so max advance is in at 3500. If your nozzle on the throttle body has vacuum at idle then it is a retard. If it has vacuum on opening the throttle then it is advance. what is the difference between the 2 and B ? both list same number dizzy . that part is unclear to me. on the chart the B lists Neg vac, along the "2" it lists same dizzy number but other numbers not neg vac. so that would be a car with no vac advance? |
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