[Diy_efi] CIS EFI via Fuel Pump PWM

[steve ravet]

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.  I
get to use words like that because I'm not an ME.  Could someone who is
turn on their calculator and calculate a worst case time constant for
the pressure buildup?  

I'll bet a virtual beer that neither makes a significant difference.

--steve

-- 
Steve Ravet
steve.ravet at arm.com
ARM,Inc.
www.arm.com

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