Carter Thermoquads ~ 'More General Information'
pinned out bleeds and idle feed restrictor on early CS 1000cfm TQ lid.
.034" idle feed restrictor
.028" primary high speed air bleed
secondary high speed air bleed- .020" falls in loose and wobbles, .024" won't go in- so it's around .022"
idle air bleed is in usual place facing backward in air bleed/main needle cavity, can't measure it.
CS carb has the diminishing idle air bleed above the booster venturi,
with downward facing main discharge tubes on both primary, secondary
primary nozzles have no air bleeds in the booster venturi or nozzle area
secondary nozzles are not the spray bar type- they have a single open angle cut exit.
comparing the air bleeds in the '72-up 800/850 carbs, to the air bleeds in the '69-'71 CS 850/1000 carbs, a picture emerges:
twice as much or more air bleed size in the later OEM carbs,
and 20-25 bigger jet size in the OEM carbs on secondary.
116 jet in CS1000, 134/143 jets in the OEM's
the hi perf TQcarbs had less jet, smaller air bleeds
the later OEM's have a huge amount of air bleed area in comparison.
maybe too much ?
it would not be difficult to drill/tap the lid of the OEM carbs for removable screw in air bleeds like a Holley, Demon, etc. have
and...the CS carb idle jet could easily be d/t for adjustable idle jets as well.
things that make you go hmmmm.....
pinned out bleeds and idle feed restrictor on early CS 1000cfm TQ lid.
.034" idle feed restrictor
.028" primary high speed air bleed
secondary high speed air bleed- .020" falls in loose and wobbles, .024" won't go in- so it's around .022"
idle air bleed is in usual place facing backward in air bleed/main needle cavity, can't measure it.
CS carb has the diminishing idle air bleed above the booster venturi,
with downward facing main discharge tubes on both primary, secondary
primary nozzles have no air bleeds in the booster venturi or nozzle area
secondary nozzles are not the spray bar type- they have a single open angle cut exit.
comparing the air bleeds in the '72-up 800/850 carbs, to the air bleeds in the '69-'71 CS 850/1000 carbs, a picture emerges:
twice as much or more air bleed size in the later OEM carbs,
and 20-25 bigger jet size in the OEM carbs on secondary.
116 jet in CS1000, 134/143 jets in the OEM's
the hi perf TQcarbs had less jet, smaller air bleeds
the later OEM's have a huge amount of air bleed area in comparison.
maybe too much ?
it would not be difficult to drill/tap the lid of the OEM carbs for removable screw in air bleeds like a Holley, Demon, etc. have
and...the CS carb idle jet could easily be d/t for adjustable idle jets as well.
things that make you go hmmmm.....
