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Date: Fri, 03 Mar 2006 15:08:11 -0500
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From: "Robert R Pastusek" <rpastusek@htii.com>
Subject: FW: [LML] Lancair IVP Turbocharger System
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Giff,

The IV-P doesn't have an air/oil separator in the induction system, but uses
one on the crankcase vent. For the induction system, air comes in through
the NACA duct under the spinner and then through a filter in the lower cowl.
(This filter is bypassed during icing conditions, and the unfiltered air is
drawn from the lower cowl). After passing through the filter, it's routed to
turbochargers on each side of the engine, and then through the inlet
ducting. First destination for the main flow is a pair of sonic ports that
control the flow, and then through a pair of intercoolers, one on each side
of the engine, mounted outboard of the cylinder heads. Just before the air
goes into these intercoolers, some is tapped off and routed to the hot side
of the air mixer box that feeds the cabin. The main air flow goes on  to the
throttle body fuel injector, but just before it gets there, a second tap is
made on each side and both feeds are run through a second intercooler on the
left forward side of the engine. From there, it's ducted to the cold side of
the air mixer box. The temperature control modulates between the hot and
cold side to maintain the correct cabin temperature.

There is a second control cable to the air mixer box that selects between
the feed of pressurized air to the cabin and dumping it overboard.

As I said, there is no oil separator in this intake circuit. The only way to
introduce oil into this flow is through a defective seal bearing on the
turbocharger

Hope this helps.

Bob

-----Original Message-----
From: Lancair Mailing List [mailto:lml@lancaironline.net]On Behalf Of
Giffen Marr
Sent: Thursday, March 02, 2006 12:48 AM
To: Lancair Mailing List
Subject: [LML] Lancair IVP Turbocharger System


I have not had an opportunity to closely inspect the turbocharger system on
the IVP. The question I have is there an Oil/Air separator, or does the
installation simple send the combined outputs to the throttle-body and the
cabin?

Giff Marr
LIVP 45%


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