Why not just plumb the return pipe in all the time ? With a restricter in
the return, so it only lets a tiny amount of petrol return to the tank all
the time. This will end your vapour lock by A/ allowing any vapour bubble to
escape B/ the hot fuel is always being replaced by cool fuel from the tank,
whether the engine is idleing or cruising flat out down the motorway at
45mph. This is how many more modern systems are arranged.
Cheers,
Chaz
http://freespace.virgin.net/chaz.mackenzie/home.htm
-----Original Message-----
From: SJH <SHARDING@SCHULTE-LAW.COM>
To: lro@works.team.net <lro@Works.Team.Net>
Date: Monday 16 April 11:05
Subject: LRO: metal fuel line question- copper
>Is there a reason to avoid using copper for fuel line assuming it can be
>adequately supported (given its softness)?
>
>I was mulling this over the other day when thinking of ways to make fuel
>delivery more efficient in my 109SW, which presently has a rubber line.
>
>I've plumbed in a fuel return line and I keep it closed off most of the
>time to avoid fuel starvation issues, and when starting a hot engine,
>I'll open this line in the event of a v-lock, in order to clear it. But
>I'd like to avoid vapor lock altogether and have a theory that the less
>resitance the pump is meeting, the better. Thus, the metal line, which I
>think was original (have to admit I've not checked), and which I think
>will be smoother inside and allow more efficient flow of fuel.
>
>If it locks this summer, I may try an electric pump - as I've tried
>everything else!
>
>Simon - wants to avoid vapor lock this summer at all costs short of an
>electric pump - Harding
>
This archive was generated by hypermail 2b30 : Tue Apr 17 2001 - 20:22:00 EDT