some of you have found quite perculiar jetting setups can be needed with bored carbs to get the idle circuit behaving.
this is linked to the fixed #100 idle air jet size not being "right" for the bored carbs jetting signals or what ever.
there have been suggested improvement by boring the air jet circuit and adding replaceable idle air jets. I did this on mine and it helped, down to #65 air jet and 38 pilot size to get things where they needed to be
next step in this it seems is to use the optional idle air screw setup
here are the details
FCR idle air screw
see table that equates turns out on idle air screw to idle air jet size
Sudco parts page
parts 30 A and 30 B
FCR exploded view
refer parts 129 and 130 plus note as optional parts to replace slow air jet part 30
would be pretty ease to tune with velocity stack early carb setups - screw would be out in the breeze !.
Walt, would sure appreciate your views / thoughts on this
this is linked to the fixed #100 idle air jet size not being "right" for the bored carbs jetting signals or what ever.
there have been suggested improvement by boring the air jet circuit and adding replaceable idle air jets. I did this on mine and it helped, down to #65 air jet and 38 pilot size to get things where they needed to be
next step in this it seems is to use the optional idle air screw setup
here are the details
FCR idle air screw
see table that equates turns out on idle air screw to idle air jet size
Sudco parts page
parts 30 A and 30 B
FCR exploded view
refer parts 129 and 130 plus note as optional parts to replace slow air jet part 30
would be pretty ease to tune with velocity stack early carb setups - screw would be out in the breeze !.
Walt, would sure appreciate your views / thoughts on this