how to hook up carb. : LUSENET : Junkyard Wars : One Thread

how to hook up an begger carb to small engine

-- (, February 19, 2001


If you are talking about a car, then go to the Holley website. Get guidance on sizing...too big a carb and your car will die when you tromp it. The engine will drowned in fuel...

-- Dan Denney (, February 19, 2001.

a "begger carb?.......does it go around looking for gasoline handouts? ....."......will run for a gallon!" sorry, i just had to do it! with spelling like that, i would have figured one of his arkansas hillbilly buddies could have answered his question already!"' i am impressed he does have a computer!

-- tim (, February 19, 2001.

Bubba, what you have to do is make an adapter from whatever is handy, using any technique (method) that you are adept at (able to do well). If the carb and motor have tube mounts with a hose kind of connector, then it's easy. Get a short hose that will fit over the stub sticking out of the carb, and connect it to the motor by using a second piece of smaller hose over the stub on the motor. If the carb and motor have the more common two bolt mounting, you may be able to take a piece of wood and fit it to the motor with two screws, then screw the carb to that with wood screws. One last option is to clean both the carb and motor flanges, and stick it on there with epoxy. Have fun. Waddy, "expert" with the "Rusty Juveniles" Pumpkin Launching.

-- Waddy Thompson (, February 20, 2001.

Actually, bolting on "too large" a carb and "drowning your engine in fuel" when stomping the throttle is not technically correct. ( usually )

Fuel is pushed out of a carburetor by atmoshperic pressure. When a piston goes down, it creates a depression in the intake manifold. Since we now have a vacuum present under the carburetor, fuel will begin to flow from the various circuits, because atmoshperic pressure ( at whatever elevation you happen to be at, which has an effect on this of course )is "pushing" the fuel out. Idle circuit, transition circuit, main circuit, etc.

( I realize this is greatly simplified, but some people have already passed out from boredom ).

If the carburetor venturi is too large, you will not get an effective signal to the main booster. This will cause a significant delay in fuel flow, and the engine will actually bog down and die from a LACK of fuel. No amount of accelerator pump shot modification will make up for too large of a carb upon sudden throttle opening. The carb will eventually work at higher RPM, but getting the engine there will take time.

Most people have the impression that when a carburetor is "floored" and the engine dies that the "engine won't take the gas". Assuming all variables are correct for the application, it is usually the opposite. The engine won't "take the air" until fuel flow catches up with the air being introduced by the wide open throttle blade(s).

There are of course instances when a carburetor is too rich for an application, but usually because the carburetor is malfunctioning, being applied incorrectly, or incorrectly modified.

As a topical subject, I am often amazed that the carbureted engines on Junkyard Wars run somewhat well most of the time. Some of the engines didn't of course ( the walking machine comes to mind ).

bobwatts Watts Carburetion Service Cincinnati, Ohio.... Earth

-- bobwatts (, February 20, 2001.

Good point about the mix going lean, but Bubba didn't say anything about making it run, he just wanted to know how to put the "begger" carb on the motor.

-- Waddy Thompson (, February 20, 2001.

Good point !

I should have mentioned that my comments were directed to Mr. Denny. As far as mounting a "begger carb", I like nails, glue, JB Weld, chewing gum, welding, and lots of Permatex.

Damn carburetor should find a job anyway, and have more self esteem than to go around begging. What's next, will "Flow for fuel " ?


-- bobwatts (, February 20, 2001.

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