[DML] Re: Turbo question

["David Teitelbaum" <jtrealty@xxxxxxxxxxx>]

What I have seen, usually on race cars, is an accumulater type system
that pumps up oil pressure while the motor is running and holds it so
when you first start the motor up it supplies oil under pressure until
the motor's oil pump can. They aren't usually filtered because of the
large flows required. The oil also performs another important
function, it cools the bearings, which is why you NEVER shut an engine
equiped with a turbo right down, you should wait for the turbo to
spool down and cool a little. If you don't the oil literaly cooks. It
gets so bad that the drain cokes up and gets plugged up with burnt
oil. When that happens you don't get a full flow of oil to the
bearings and they burn up. You also MUST change the oil 2X more often
with a turbo. It is also a good idea to use synthetic, it is more
durable with the high temperatures. Even though synthetic is expensive
the oil is cheaper than the turbos!
David Teitelbaum
vin 10757


-- In dmcnews@xxxxxxxxxxxxxxx, "B BENSON" <delornut@xxxx> wrote:
> > Something that I've noticed with every single turbo >set up that I've
> > seen installed is dirty oil being used to lube the >turbines. Weather
> > it's a "T" inline from the oil pressure sending unit, or a >pickup
> > line pulling oil directly from the sump. Why? If you >want to prolong
> > the life of the turbos, retrofit your car to supply >CLEAN oil to the
> > turbos.
> >
> > -Robert
> > vin 6585 "X"
> 
> 
> 
> Where else do you think you'd get oil from? The types of turbos used
in the
> kit's that were offered for DeLoreans are the type that float the
impeller
> shaft in oil which is flowing through holes in the bushing
surrounding the
> shaft. The life of that bushing can be measured in seconds if not
> milliseconds if oil flow is inadequate or disrupted when under
boost. Trying
> to install filtering up stream of the turbo or trying to design a
separate
> source for the oil shouldn't even be considered as a part of the system.
> 
> Bruce Benson




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