<VV> turbocharger cooling

[jvhroberts at aol.com]

 The term is plane bearing, as in, the journal planes on a film of oil. 



Ball bearing turbos are a VERY different beast. They still need to either be idled till cool or have some other means to keep from coking the oil. 





 





 



-----Original Message-----

From: Bryan Blackwell <bryan at skiblack.com>

To: FrankCB <frankcb at aol.com>

Cc: Virtual Vairs <virtualvairs at corvair.org>

Sent: Wed, 27 May 2009 5:17 pm

Subject: Re: <VV> turbocharger cooling













Hi Frank,



Be aware that the VNT-25 used a plain bearing, much like a Corvair  

turbo.  In that design, it's essentially the same bearing with the  

addition of a water jacket and they can indeed be used without the  

water cooling, assuming you take care of the turbo bearing by not  

shutting it down hot and changing the oil.  The ball bearing turbos  

are different, which was the point Frank P was trying to make, I think.



--Bryan



On May 26, 2009, at 9:36 PM, FrankCB wrote:



>      I was thinking more of INLINE 4 cyl engines like the Dodge  

> inline 4s with VNT-25 turbos.  Here's what the Garrett engineer  

> said about using their VNT-25 in other applications:



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