[urq] Fuel Pump surge - still having problems

[Ingo Rautenberg]

Yup.  Larger diameter=slower flow.  Smaller diameter=faster flow.   
Same principle as used for traditional na intake manifold design.   
Longer and thinner runners make the engine produce more torque, but  
less horsepower.  Shorter, larger diameter runners allow for more  
HP.  Best of both is the variable manifolds with valving for dual  
runners.  Forgive me, I digress...

On Apr 17, 2008, at 9:56 AM, Steve Eiche wrote:
> FWIW, later ur quattros as well as other Audis with the external pump
> have a larger diameter fuel supply hose from the tank along with  
> larger
> diameter fittings on the tank and pump.  Perhaps this was Audis "fix"
> for the fuel pump noise issue.
>
> Steve
>
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