pearljam724
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5:47 of video. “ If the pressure is too high. The fuel will blow right past the needle and seat.”
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Fuel pressure gauge question
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5:47 of video. “ If the pressure is too high. The fuel will blow right past the needle and seat.”
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Exactly what I posted in reply #17... and when that happens the bowl overfills and things go to hell after that.
I'm with you, dadsbee:
I respectfully disagree with the bold font above. Once the fuel pressure fills the bowls, and the needle shuts off the flow, the pressure is taken out of the equation. I do agree that the pressure and volume has to have the ability to keep the bowls supplied with fuel at the rpm the engine operates.
Ernie ingling
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Thanks pearl jam u esplane really well.
steve340
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The fuel pressure just supplies fuel to the float chambers/bowls. Assuming your float level is right at all engine speeds and the fuel pressure is not to high or to low a carburettor would work fine. Fuel mixture in a carb can be affected by high or low float level, we all know what happens when a needle valve leaks and float level rises, the engine will run rich.
This happens irrespective of fuel pressure.
The fuel is actually drawn through the carb by the depression created in the venturi's. It works very similar in principal to siphoning.
Atmospheric pressure enters the carburettor circuits through the air bleeds.
This happens irrespective of fuel pressure.
The fuel is actually drawn through the carb by the depression created in the venturi's. It works very similar in principal to siphoning.
Atmospheric pressure enters the carburettor circuits through the air bleeds.
matthon
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Gauge is on throttle body in clear view, orientation not straight up but if it was I couldn't see the range I want to see and it wouldn't be tight, iirc.
Regulator and return line mounted close to tank. One line up, splits close to throttle bodies. Pressure is always steady.
Regulator and return line mounted close to tank. One line up, splits close to throttle bodies. Pressure is always steady.
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AMEN....
I've mentioned a similar explanation previously, of how a carburetor operates, but, apparently, I was preaching to the choir. To the unbelievers, a carburetor is a relatively simple device, regardless of brand name, be it Carter, Holley, Edlebrock, Rochester, Weber, Zama, etc., all function on the differential pressure principle.
The supply system simply operates to insure the carburetor has an adequate volume of fuel for proper operation. Just my opinion of course.
BOB RENTON
Jeez, Bob. You think we all read your posts with rapt attention to details? ....lol. Actually, I do.
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