Dual fuel PFI rails....

[Ludis Langens]

Barry Tisdale wrote:
> Ok, with 2 rails feeding each injector, there's maybe 2cc or so "common" volume between any rail and the injector.  The fuel pump
> prevents backflow;
> [...]
> Remember liquids are incompressable; the fuel in the unused rail has *nowhere* to go; will get *slight* mixing @
> the interface between the 2 fuels due to turbulence, but again, minimal.

Your logic shows that the active fuel shouldn't get into the inactive
rail.  I suspect that the opposite will happen - the active fuel will
suck the inactive fuel out.  Fluids flowing past an orifice, pressure
drop, yada yada yada.  So, will that fuel pump also prevent forward
flow, or will it allow a trickle of inactive fuel into it's fuel rail?

-- 
Ludis Langens                               ludis (at) cruzers (dot) com
Mac, Fiero, & engine controller goodies:  http://www.cruzers.com/~ludis/