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On 25 Nov 98, at 22:33, Todd Daley wrote: > > this "damper" is used to stop any pulses caused by the fuel pump.... it is > hollow because it uses the differences in diameter between the fuel line > and the interior of the damper to control the "waves" produced by the > pump....... these dampers are also used on some vehicles to dampen the > pulses in the vacuum supplied to the vacuum advance distributor, air > conditioning systems also use this form of damper to control the pulses > from the A/C pump........ It is simple, but effective in doing its > job....... whether it really makes a difference in the fuel system is > another story, but another way of looking at it is that it is not like it > can really wear out..... Well, we do know that they can rust out. ;-) The change in diameter is irrelevent to the damping, but a large volume would be important in the case of a compressable fluid like the other instances you quote (air.) In the case of gasoline, I just don't see this having any effect. Most of the resilience (which is responsible for the damping) here is in the rubber hose. This all got run around and around sometime last summer or spring. Jim - ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA ******************************* ------------------------------------------------------------------- Unsubscribe? mailto:type3-request@vwtype3.org, Subject: unsubscribe