As for Air Locks, I've experienced them a couple of times in race
cars. One in particular drove me nutz for several days, and cost me
much time and money for dyno time. If you go back to the 15/06, I
posted about this episode. I believe that this was Paul Conner's problem
as well.
I've forwarded the relevant email to you separately. The issue is
that theoretically, any air in an EFI high pressure line SHOULD
purge, but in practice, it often doesn't. It all depends on
the diameter of the line. The problem usually occurs at the junction of a
flexible hose with the steel fuel lines.
I can only tell you that it IS a reality, and to watch out for it if
you happen to experience funny partial power problems. It is just one of
those little things that experience has taught me to look out for, and I
merely pass it on as something to consider.
Cheers,
Leon
(Still trying to talk my dragracing mates into comparing BSFC figures of
their V8s!). (}:>^)
----- Original Message -----
Sent: Thursday, June 23, 2005 12:46
AM
Subject: [FlyRotary] Re: "Surge" tanks
and air bleeding was Re: [FlyRotary] EFI Fuel Testing
Additionally, anywhere you get an air lock (as
opposed to a vapour lock),
you will have trouble passing fuel, so any
unavoidable high points/loops
etc in the system should have some sort of bleed
nipple.
Leon;
My system is
essentially as you describe except my sump is larger (2 ½ gal). I assume
the above statement refers to ‘before the pump’ because I don’t see any issue
with a high point in
the line downstream from the EFI pump. My experience is that any air in
the line is easily pushed through and past the regulator back to the
sump. And why not – the only resistance to it moving through is the very
small pressure head between the high
point and the
regulator.
Al