[s-cars] RE: More ol to turbo feed

[Kaklikian, Gary]

Yeah, I'm going to try the oil filler cap vent and Lucas Oil Stabilizer first, although several 944t tuners suggest the oil feed restrictor with Garrett turbos. No smoke out the exhaust, but the intercooler pipes are full of oil.  I don't doubt there's a problem with the oil rings,  but compression is good and leak down was under 10% on all cylinders. And oil consumption is only really excessive on the track.  
Any thoughts on using Lucas Oil Stabilizer, with synthetic or dino juice?


-----Original Message-----
From: QSHIPQ at aol.com [mailto:QSHIPQ at aol.com]
Sent: Tuesday, December 09, 2003 08:23
To: Kaklikian, Gary; s-car-list at audifans.com
Subject: Re: More ol to turbo feed


A whole 'nother subject.... Lots of BTDT without much success.  The feed line 
and the restrictor in it to the turbo has to be maintained in terms of design 
and pressure.  This has to do with the boundary layer of oil pressure around 
the bearings.  I always figured more oil to the bearings was better.  What I 
found was that small changes in oil feed oriface (pipe or restrictor/diffusers) 
could make a difference between a smoker and a non smoker turbo.  I also 
suspect that many of the early ball bearing turbos that went on audi applications 
suffered from this problem.

Proceed with caution here Gary.  Make sure you do your homework.

HTH

Scott Justusson
In a message dated 12/9/2003 8:21:55 AM Central Standard Time, 
gary.kaklikian at hp.com writes:
For now, I'm going to try the oil filler cap vent, maybe some Lucas Oil 
Stabilizer (anyone tried this stuff in a turbo application?), maybe turn the boost 
down a bit (yeah I know in the Audi world, 16psig is nothing). And maybe a 
restrictor in the oil feed line to the turbo, as others with 944T's have used 
with Garrett turbos. Anyone running a Garrett on the Audi 20vt noticed a lot of 
oil in their intercooler pipes?