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Thats a great thought, Kelly. I'll see if I can dig up the
rest of the stock oil line.
I don't believe the
stock turbo had a restrictor in the line, but I seem to recall that there
was a difference in the in, and out port on the turbo itself. In other
words, the orifice in the top (in) port was smaller in diameter than the bottom
(out), which would act as a restrictor to some extent.
The biggest problem with
turbo oil lines is usually the return. These bearings can not be
pressurized. The return line should be large diameter, and gravity
fed to the engine. The typical Mazda return is a large diameter steel
pipe, to allow the frothy oil to easily return to the
engine.
Did you
get creative with the orientation of the turbo, or is it
mounted using the stock manifold?
And another thing- where
are our pictures? We like pictures :-)
Speaking of oil pressure. I have 70+ psi on engine start and
warm up, but after the oil gets hot the oil pressure drops into the 30's as soon
as I throttle back. Is this normal?
That's probably OK. I think 30
is about the spec for idle, but I realize you aren't doing any real
idling. I believe the oil pressure spring is normally set at 60 psi, and
you'd expect it to be a bit higher when the oil is cold and thick.
Cheers,
Rusty
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