RCU Forums - View Single Post - Tank position problem.

08-29-2009 | 02:18 PM

#22

DarZeelon

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From: Rosh-HaAyin, ISRAEL

RE: Tank position problem.

Quote:

ORIGINAL: James c harrell

...My problem was indeed tank being lower, about 4-5inches , carb to clunk.

James,

You're making that incorrect assumption again... and missing the point.

It does not matter how high the clunk in your fuel-tank is!
The only thing that matters is the level of the fuel.

This is the reason people tell you to set the tank, so its center-line is at the same level as the carburettor's nozzle.
...And no-one but you even mentions the clunk...

Suppose the clunk is all the way at the bottom of a 4.5' tall barrel (with a large enough diameter fuel-line that would not impede flow), filled almost to the brim with fuel, to which the engine is mounted. As long as the level of the fuel is no higher than 2" above the carburettor's nozzle, to no lower than 2" lower than the same; the engine will get a reliable fuel-delivery.

Pascal's Law determines that all that matters is the level of the fuel.

So, if you set the average level (the tank's center-line), to the same level as the fuel's point of entry into the engine, you will get the minimum variation in the amount of fuel delivered, at each throttle setting.

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