View Single Post
polizei polizei is offline
Registered User
polizei's Avatar
Join Date: May 2007
Location: Collegeville, PA
Posts: 1,367
I was just over on the Honda Tech forums, and they were saying that these new ceramic ball bearing turbos (such as the AMS 850, aka Precision HP6262) are actually considered air cooled, since the water inlet and outlet have been removed. Here's a quote from Precision:

"Precision Turbo Dual Ceramic Ball Bearing Turbocharger
These units feature an air-cooled, ball bearing center housing rotating assembly. Dual, angular contact ceramic ball bearings are utilized for maximum durability and an increased thrust load. These units require the use of a 1/8” NPT to -4 AN male fitting on the oil feed side, which can be purchased separately from Precision Turbo (PFT047-3039). At this time, we do not feel it is necessary to use an external oil feed restrictor fitting. At the minimum, we recommend the use of a -10AN oil drain flange/line. This flange can be purchased separately from Precision Turbo (PTP074-2008). Water cooling is not required on these units.
***This unit has been sealed for quality purposes. Do not remove the factory oil feed restrictor fitting, or damage may result***
I've never heard of an "air cooled turbo". Does this suggest that the turbo should see forced air? Or that an air duct to the turbo needs to be fab'd?
Andy - 1987 911 Carrera Coupe
Old 11-02-2010, 08:55 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #32 (permalink)