Re: Fuel Pump Mythbuster #2

Posted by Owen_Dyneto On 2011/6/3 13:11:59

I ma running a 30 day experiment on evaporation right now, results will be posted.

From my own experiences. Both my car's carburetors are vented to the atmosphere; the 34 (Stromberg EE-23) directly to the underhood space, and the 56 (dual Rochester 4GCs) thru the air filter canopy.

If I attempt to start either car within a week of the last use, they will start nearly instantaneously, perhaps with about 1/2 turn of the starter motor following a single stroke of the accelerator. After 2 weeks the 34 will require cranking for perhaps 2 seconds; the 56 perhaps twice as much. After a month the 34 still requires only about 3-4 revolutions of the engine to start but the 56 often requires at least 10 seconds of cranking which isn't surprising, a lot more fuel is required to fill both carbs.