Precision Turbo and Engine Turbocharger Installation Recommendations - Manual (Page 3)

TURBOCHARGER LUBRICATION – FEED LOCATION
Turbocharger lubrication feed locations may vary from engine manufacture and
application. Sometimes the best resource for information on turbocharger lubricant feed
locations is from the professionals that specialize in a particular vehicle or engine
A recommended location to pick up lubricant to feed the turbocharger would
be a pressure location as close to the outlet side of the oil filter.
A remotely mounted oil filter header is best location to feed a turbocharger
with filtered lubricant. Be sure to feed the turbocharger from the filtered side.
It is not recommend to use an oil filter sandwich plate as a source to pick up
lubricant to feed a turbocharger. We have seen cases where these do not filter
the lubricant properly and the turbochargers fail due to contaminated
lubrication.
TURBOCHARGER LUBRICATION FEED LINES
It is not recommended that any journal bearing turbocharger utilizes an oil feed line
restrictor. If a turbocharger is leaking oil or smoking this is typically caused by another
issue. If we have gone over a customer’s installation in great detail and the turbocharger
continues to leak oil and smoke then and only then would we suggest an oil feed line
restrictor. We would start with a restrictor of .090 inch and work down to a restrictor no
smaller than .065 of an inch. This will be done on a case by case basis only.
1.
Turbocharger oil feed line sizes. (JOURNAL BEARING)
All small single journal bearing turbocharger applications utilizing
turbocharger sizes up to HP42 should utilize -4AN or 1/4 inch inside diameter
oil feed line.
All single journal bearing turbocharger applications utilizing turbocharger
sizes HP47 and up should utilize -6AN or 3/8 inch inside diameter oil feed
line.
All small twin journal bearing turbocharger applications utilizing
turbocharger sizes up to HP42 should utilize a -6AN or 3/8 inch inside
diameter main oil feed line into a Y block to -4AN or 1/4 inch inside diameter
turbocharger oil feed lines. The -4AN turbocharger oil feed lines from the Y
block to the turbochargers should be equal in length.
All twin journal bearing turbocharger applications utilizing turbocharger
sizes HP47 and up should utilize -8AN or 1/2 inch inside diameter main oil
feed line into a Y block to -6AN or 3/8 inch inside diameter turbocharger oil
feed lines. The -6AN turbocharger oil feed lines from the Y block to the
turbochargers should be equal in length.