progression ignition - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Rich72C10 · 10-25-2021, 06:45 PM

Color me wrong for assuming the two ports on the passenger side (front top and side) were ported. I guess the only ported one is the diver's side that you see capped in my attached photo.

Though to me it seemed the passenger top had a bit of a stronger vacuum, so I connected this to the progression ignition vacuum port.

Gee, I feel stupid as I should have connected all the ports to my vacuum gauge months ago.

Edit: This is what I have decuded with my gauge and how the lines are connected.

Passenger Choke Side to EEC Charcoal canister - full manifold but seems a tiny bit less.
Passenger Top (above fuel line) going to progression ignition vacuum port - full manifold.
Passenger Bottom Tee between EEC Charcoal canister & PCV Valve - full manifold.
Driver bottom, capped, Ported Vacuum.
Back of Carb (not pictured) connected directly to Power Brakes - full manifold.
End of ports on my 72 Carb

10-25-2021, 06:45 PM	#11
Rich72C10 Mr. Cheyenne Join Date: Jun 2020 Location: Kyle, Texas Posts: 1,687	Re: progression ignition Color me wrong for assuming the two ports on the passenger side (front top and side) were ported. I guess the only ported one is the diver's side that you see capped in my attached photo. Though to me it seemed the passenger top had a bit of a stronger vacuum, so I connected this to the progression ignition vacuum port. Gee, I feel stupid as I should have connected all the ports to my vacuum gauge months ago. Edit: This is what I have decuded with my gauge and how the lines are connected. Passenger Choke Side to EEC Charcoal canister - full manifold but seems a tiny bit less. Passenger Top (above fuel line) going to progression ignition vacuum port - full manifold. Passenger Bottom Tee between EEC Charcoal canister & PCV Valve - full manifold. Driver bottom, capped, Ported Vacuum. Back of Carb (not pictured) connected directly to Power Brakes - full manifold. End of ports on my 72 Carb Attached Images __________________ Richard *'72 Chevy C10 Cheyenne Super WHT/MED BRONZE/WHT SBC 350 \| TH350 \| LWB \| AC \| Buddy Seats Upgrades:** Tilt \| Front Sway Bar \| Radio \| Sliding Window \| Bed Spare w/Lock Bed Rails \| Full LEDs \| Courtesy Lights \| Tachometer \| Glovebox Lock & Light \| Head Light Relays \| Upgraded Fully Super Trim Last edited by Rich72C10; 10-25-2021 at 07:02 PM.*



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