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Re: [turbobike] Fuel return lines

Tue, 29 Jun 1999 08:28:22 -0400

The problem with that is that you then have a head of pressure on your return
line (due to the gas in the tank above), instead of letting the return free flow
back to the top of the tank.  This can lead to inconsistent fuel pressure,
especially with large volume/high pressure systems.  Granted, it's less of an
issue with gasoline than alcohol, but why take the chance when there are so many
other things that can screw you up?  This brings up another point - if you take
a look at Kinsler fuel injection's book, he even looks at issues like the
location of the return in the tank so as to not froth the fuel near the tank
outlet and cause pump inlet cavitation.  Again, we're talking high volume
constant flow systems here, so this may not be a concern for a draw through with
boost compensating regulator.

Anders Brink <anders.brink@lynchburg.net> on 06/28/99 09:35:22 PM

cc:   turbobike@natvideo.com (bcc: Bob Shammas/CORP/Nsk-Corp)

Subject:  Re: [turbobike] Fuel return lines

shammar@nsk-corp.com wrote:
> I don't know about welding on fuel tanks - it can be done but
> I never liked the idea.

Why make it more complicated than it has to be?
Simply connect the return fuel hose to the main hose
between tank and fuel pump with a T.