[V8] returnless fuel systems and vapor lock
Tony and Lillie
tonyandlillie1 at earthlink.net
Wed May 17 22:45:07 EDT 2006
The good thing about a returnless system is that it doesn't constantly
circulate the fuel through the hot engine bay. That is one of the reasons
they switched, among others, I'm sure.
----- Original Message -----
From: <NicolCS at aol.com>
To: <v8 at audifans.com>
Sent: Wednesday, May 17, 2006 9:11 AM
Subject: Re: [V8] returnless fuel systems and vapor lock
> Wouldn't a returnless fuel system be more likely to vapor lock?
> No, the fuel is under about 50 psi pressure which raises the boiling point
> for one thing, plus the problem with vapor lock is that mechanical fuel
> don't pump well when there's pressurized vapor in the lines or pump. With
> electric pump submerged in fuel in the tank it easily compresses the vapor
> blows it through an injector. It might run funny for a few seconds but
> disable the motor. A return system works better 'cause the hot fuel is
> cleared right out and back to the tank but returnless systems are well
> proven too.
> Craig Nicol
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