I removed the boosters from a (C5SF B) 4100 Autolite i just picked up and looks all original, it has a BA secondary booster and a (KA) primary booster i believe this to be a 65 thunderbird 390 carb ,is the primary K A booster similar in performance flow to an (M) 289 HI PO primary booster
C5SF B 4100 carb boosters
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- Official Post
I removed the boosters from a (C5SF B) 4100 Autolite i just picked up and looks all original, it has a BA secondary booster and a (KA) primary booster i believe this to be a 65 thunderbird 390 carb ,is the primary K A booster similar in performance flow to an (M) 289 HI PO primary booster
Chuck, the BA secondary boosters are common to many 4100 carburetors. Do you have an M or MA primary booster to compare your KA booster to for sizes?
-Fred-
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Thanks for the tip fred , i will need to remove it to compare them , whats the best way to measure them, - chuck.
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Thanks for the tip fred , i will need to remove it to compare them , whats the best way to measure them, - chuck.
Precision go / no go pin gauge sets to measure tiny orifices after keeping parts and tools at 73°F (room temperature) for 24 hours first. Industrially our test room was kept at 73°F and 50% RH.
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Dan thank you for your reply and guidance , i dont have those type of measuring tools , i thought of using a magnifying glass that might show some difference between the two, would the M booster have larger orifices than the KA booster,
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Dan thank you for your reply and guidance , i dont have those type of measuring tools , i thought of using a magnifying glass that might show some difference between the two, would the M booster have larger orifices than the KA booster,
I do not remember what is different among these parts anymore. The supports have multiple air bleeds and passages in multiple locations.
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