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MarkRobinson MarkRobinson is offline
Architecture & Porsche's
Join Date: Jan 2006
Location: Austin, Texas
Posts: 3,189
for Precision turbos, all BB turbochargers need restricted oil feeding. I had to use an inserted nitrous jet in the underside of my oil supply line flange to restrict the oil down to a hole the diameter of a larger needle.
My car spewed oil & smoked badly until we figured this out, then I drove the car 110k miles before i pulled the turbocharger off during an engine swap.

IF memory serves, the KKK series have a restriction within the turbocharger so that the line feeding is much more than the turbo needs but the turbo itself has the restriction. On BB turbochargers that I've seen, oil restrictors are always used.
Porsche Club Racing National Scrutineer
'89 Andial 951
'82 928R
'74 911 RSR 3.6
Old 07-05-2012, 01:24 PM
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