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Classic/Antique Car Repair/vacuum system, carb initial needle settings


Brad I have a 1946 f-1 pickup with the 100 hp flathead v-8 engine .   the carb on the truck is a 1 bbl and has a vacuum connection in the section below the carb and above the intake.  what is this part called and do they still make the connection for the distributor/windshiels wiper venture vacuum connection.  the one it came with looks like the threads and gaskets are missing and the previous owner wrapped electrical tape around the connection to keep the vacuum sealed. also what should I set the fuel/air screws in the back of the carb to get it started. thanks jdg

A flat head V 8 should have a two barrel carburetor on it as from the factory. I usually make the new fitting using brass connections that can be found in most hardware stores. This base connection is threaded into the intake manifold and fittings can be found that will screw into the manifold. If the threads are stripped in the manifold I susally drill and rethread the hole the net step oversive and then use a reducer bushing to get back to the right size fitting. The air fuel idle miture screws are lightly seated buy turning them in clockwise until they just seat and then turn them out 1 1/2 turns. That should get the engine started. Let the engine war, up and thyen working with one screw at a time, turn the screw out slowly until the engine speeds drops off. Then turn it the other was until the engine speed peaks and drops off slightly. Stop and turn the screw out 1/4 turn. Then work the other screw the same.

Classic/Antique Car Repair

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Brad Sears


All automotive including antique and collectible. However if the car has been modified I can only answer in general terms and maybe get you pointed in the right direction.


Automotive tech instructor. Syndicated auto columnist 1970's though the early 1990's. Syndicated auto radio talk show, Ask Brad About cars, CBS Radio 70's through 90's TV Show "Last Chance Garage" 1980's PBS-TV syndicated. Auto instructor for the following companies: Fram Autolyte Holly Carter AMF Ford Motor University Of Conn Blue Hills Technical School Sugar River Technical Center Grew up in a family garage in Needham Mass and turned wrenches from the age of 14.

Manchester Union Leader, Nashua Telegraph, Motor Service Magazine, Yankee Magazine, Popular Mechanics (Saturday Mechanic early 80's), Los Angeles Times, New York Times, and lots more.

More than I care to remember. Basically Franklin Technical Institute in Boston, Northeastern University, Fitchburg State Teachers College, Tufts University, and a lot of factory schools along the way.

Awards and Honors
Moto Award winner. And much more.

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