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I have
the Mistral intake and am setting up my fuel lines. The lines go into the
fuel rail through a big hole (3/8?), but exit through a very tine "pin hole" on
the other end. I am not versed in fuel injection as my history is with
carbs in my ol' 65 Mustang ragtop.
During
the first incarnation my build buddy David had a pressure regulator installed
before the fuel rail. Then, following some internet research on fuel
injection by me, I found several sources that stated the pressure regulator is
usually installed downstream of the rail. David figured this may make
sense, but felt it should be T'ed back to the sump tank (sump per Velocity
plans).
I
looked at my friends RV-7 who is installing an Eggennfelder Subaru which also
has pin hole restrictor and tried to copy its pressure regulator set
up, however, Dave and my mechanical engineering hangar mate, Richard, do not
think it is proper. I too wondered what the pressure regulator was
actually doing since it is downstream of the pin hole which provides a lot of
restriction and it was T'ed in a manner that went around the regulator and since
the fuel would go by the path of least resistance would in all likelihood bypass
the fuel pressure regulator almost completely.
I had
another engineering friend look at the set up (who btw has worked with some of
the Mistral folks as he is heavily involved in the aviation community...the
company he owns provides aircraft A/C systems for companies like Cirrus, Moony,
Eclipse, Columbia and in the last couple of months he has been in discussions
with Cessna, Piper and Honda Jet.....pretty good credentials....and he is the
builder of the RV-7 with the Eggenfeilder) He believes that the Mistral
Intake does not need the pressure regulator since the pin hole is doing the job
of keeping the rail "charged".
We
have emailed the contacts at Mistral who have not as of yet responded....it has
been a couple of weeks. I understand they cannot provide major tech
support, but I would love some direction. We hope to be great ambassadors
for their product. I would assume some basic tech info is
available.
However, since I have yet to hear from Mistral, do any of y'all have any
insight and/or solutions as to what would be "best" <g>.
Thanks, I am quite close to first start, but I obviously need to resolve
this question.
All
the best,
Chris
Barber
Houston, Texas
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