65 T-Bird carb swap to Edelbrock AVS2 650CFM
Posted: Sun Sep 10, 2023 12:16 pm
I'm planning on swapping my original 4100 Autolite carb to either one of the following:
Edelbrock AVS2 (leaning towards this one): https://www.edelbrock.com/avs2-650-cfm- ... -1905.html or Edelbrock 1405: https://www.edelbrock.com/performer-ser ... -1405.html
I will be installing it onto stock/original 4 hole/barrell intake manifold (C5AE9425C).
I'll most likely get rid of the PCV/coolant heated spacer underneath the carb, replace it with heat insulating spacer and run the coolant hose straight to heater core, bypassing PCV plate.
I'm not sure what spacer & gaskets I should use, so would greatly appreciate support :) I think best would be to use the 4 hole spacer and gaskets.
Edelbrock AVS2 has differently sized bores; primary 1.44" & secondary 1.75". My concern is that the bores on the spacers might be too small for the throttle plates on the bottom of the carb to fully open. Could that happen, or do such spacers come in universal bore diameters that clear most carbs?
If that spacer setup wouldn't work, could open center spacer (square bore) be installed on 4 hole manifold instead? Would it downgrade the performance in any way? Curious to hear from those who have Edelbrock carbs installed on the original 4 hole intake manifolds, how they dealt with their setup.
Edelbrock AVS2 (leaning towards this one): https://www.edelbrock.com/avs2-650-cfm- ... -1905.html or Edelbrock 1405: https://www.edelbrock.com/performer-ser ... -1405.html
I will be installing it onto stock/original 4 hole/barrell intake manifold (C5AE9425C).
I'll most likely get rid of the PCV/coolant heated spacer underneath the carb, replace it with heat insulating spacer and run the coolant hose straight to heater core, bypassing PCV plate.
I'm not sure what spacer & gaskets I should use, so would greatly appreciate support :) I think best would be to use the 4 hole spacer and gaskets.
Edelbrock AVS2 has differently sized bores; primary 1.44" & secondary 1.75". My concern is that the bores on the spacers might be too small for the throttle plates on the bottom of the carb to fully open. Could that happen, or do such spacers come in universal bore diameters that clear most carbs?
If that spacer setup wouldn't work, could open center spacer (square bore) be installed on 4 hole manifold instead? Would it downgrade the performance in any way? Curious to hear from those who have Edelbrock carbs installed on the original 4 hole intake manifolds, how they dealt with their setup.