- Official Post
my 1.12 carb currently has "KD" primary and "BA" secondary boosters
Carb was rebuilt by Pony Carbs several years ago.
Your "KD" booster is for a 1966 full size Ford with a 390.
-Fred-
WTB: Autolite 4100 "M" primary booster cluster
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- Official Post
That makes sense as I think that is what the carb is from.
it is a C5AF-H
Would the KD booster be to big for my 289 ?
The reason this journey started is because of a "flat spot" during acceleration around 1000 to 1500 rpm.
I was thinking that I was not getting enough fuel during "transition" from the idle circuit to the main circuit.
I would begin by checking the bushing size that I mentioned to a #54 drill bit as that controls the amount of fuel to the booster. It is also possible that the booster is warped and not totally sealing to the carb body. A second gasket can sometimes be a cure for that issue.
-Fred-
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The "K" booster was also used on the 1962 221 carburetor. (C2OE-N & C2OE-R)
I've used those more than once on 1.12 carbs on small blocks. It does fix the unresponsive idle mixture screw issues, is a legitimate "replaced by" booster in the hipo carburetor lineage and provides correct performance from that carb.
I've never checked the bushing size though.....
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I have a question - on an M booster for a 1965 K code how many holes do the tubes have? I have heard 5 holes in each tube. Is this correct? My booster seems to an M and a 3 stamped on the bottom .
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- Official Post
I have a question - on an M booster for a 1965 K code how many holes do the tubes have? I have heard 5 holes in each tube. Is this correct? My booster seems to an M and a 3 stamped on the bottom .
My "M" boosters have 4 holes on each side if the tubes.
-Fred-
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