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On Sun, 2006-09-03 at 20:37 -0700, Steven Ayres wrote: > JasonW=> It ultimately serves the same purpose? > > No. The cutoff jet stops the piston from pulling fuel, but there are > still open air passages into the float bowl, and the carb intake is > above the float level, so even if the needle valve happens to be hanging > open, it's not possible to siphon back out of the carb. > > The antisiphon valve ensures that the fuel stays in the fuel pump, ready > to go. The stock pump is above the tank, so gravity can pull fuel back > from the engine compartment. > The stock fuel pump is above the tank ONLY if the car is sitting level. If the nose is in th air, the tank can be above the engine. The check valve in the pump was designed to stop flooding the carbs when the engine was off. -- russw <russw@classicvw.org> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~