I did a little checking and you can't push fuel through the VW mechanical pump so a backup system would entail, at minimum, a couple check valves and an electric pump...a bit more complicated that I care to make it. I see Facet has pumps that will flow through so you can run them in series as a boost pump or backup as Mark did. This might be the way I go.
On Sat, Feb 8, 2014 at 10:25 AM, peter <jordanruthseto at aol.com> wrote: > Why not copy the Piper design with a mechanical (diaphram) and electric in > series? Diaphrams do fail, but only from neglect. I'd use a stock VW pump > and replace it every other year in an excess of caution. Peter > > > > > >All the VW s I've had over the years,> I don't recall ever having one go > bad. I'd like to have a plan b though.> What you all think?One thing to > consider is that when the VW pump does fail due to a diaphragm rupture, > fuel is free to flow into the engine block, and things get ugly immediately > after if you are pushing it with 5 psi! I think that's why you don't see > many stock pumps on aircraft engines. That's why we don't use them on > Corvairs, at least...Mark Langford > > > > _______________________________________________ > Search the KRnet Archives at http://tugantek.com/archmailv2-kr/search. > To UNsubscribe from KRnet, send a message to KRnet-leave at list.krnet.org > please see other KRnet info at http://www.krnet.org/info.html > see http://list.krnet.org/mailman/listinfo/krnet_list.krnet.org to change > options >
