[Diy_efi] Fuel Pump PWM

[bcroe at juno.com]

The amount of compressibility practically is going to be 
tied to how much rubber hose you have and how many 
bubbles are in there.  The steel line and the liquid are 
not going to be significant with any kind of flow.  I doubt 
propagation time down the line is either, but increasing 
the amount of rubber and vapor in the path IS.

Bruce Roe

On Mon, 05 Aug 2002 22:24:26 -0500 steve ravet 
<sravet at arm.com> writes:

> Bernd Felsche wrote:
> > If fluid isn't compressible, how does it transmit sound? :-)
> > Yes, fuel *is* compressible.

> > The longer the fuel line, the longer the propagation delay.

> The propagation delay is the speed of sound.  I doubt that's 
> worth considering.  The delay in building pressure is due to 
> the compressibility of the fuel and the stretchy-ness of the 
> fuel lines. 

> Steve Ravet

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