[200q20v] Audi 20V Turbo Crankcase Breather System Tuning

[isham-research.freeserve.co.uk at pop.pol.net.uk]

>>THE BIGGEST PROBLEM IS THAT WITH HIGH
>>BOOST THE CRANKCASE OIL/AIR MIXTURE FLOW GETS INTO THE
>>INLET VALVES AND STICKS TO THE VALVE SURFACE
>>AND AFTER LONGER HARD USE THE INLET VALVES ARE PROBABLY NOT
>>94% TO 97% TIGHT ANY MORE !

> Anyway, this seemed to be entering into Phil P. territory, so I
> though I'd cc him on this one to see if he has any input on the
> subject.  If $100 keeps me from coating everything from the turbo to
> the tailpipe with carbon and yields better performance+engine life as
> a result, I find it hard to argue.

It all depends how much, really.  All turbo I5s have oily inlet tracts -
it's all a matter of degree.  Most of it isn't actually oil - it's a
condensate that results when fumes from the crankcase meet the
relatively cold air in the inlet.  Some is oil vapour, some burnt and
unburnt fuel.  You couldn't actually lubricate anything with it.  The
only potential pure oil contributor is the turbo seal on the inlet
side.

--
 Phil Payne
 http://www.isham-research.freeserve.co.uk/quattro
 Phone +44 7785 302803   Fax: +44 7785 309674