KKK turbos,VATN....

[Gerard <gerard@poboxes.com>]

> Don't know of any KKK sites, nor do I know which KKK turbo the audi uses.  I
> doubt it is very different than the ones Porsche uses (k-26, k-27, etc...).

Mostly k-24 and k-26 on the MC motors. I have a k-26 and the lag is
very noticable, and scary sometimes.

> I don't know anything about variable vane systems.  But from the sound of it,
> it seems that the vanes are aligned with the flow of exhaust, eliminating back
> pressure at light loads (when you don't need the turbo spinning).  If you need
> the turbo, then the vanes start to face the oncoming exhaust causing the turbo
> to spool up.

Hmmmm...I would also have thought it would be in the turbo hot side,
but some point out it is actually vanes on the cold side that are
not part of the impeller, but are arranged around the impeller
housing and actuated to spin more air onto the impeller vanes. Perhaps
when not needed the vanes lay flat and there is very little air push
onto the impeller vanes, so when the exhaust spins the hot side there
is no air resistance as the impeller isn't pushing much air, this
in turn means (to me at least) that the shaft can spin almost freely
(ie. hot side vane gets gas and starts to spin the impeller, but the
impeller is receiving less air due to secondary vanes not assisting
which means a more free spin. Anyone have an idea how this thing
really works to eliminate "back pressure"?).

G.
-- 
"a thousand miles from here, there is another person smiling"
1990 Turbo (200t, MAC13A ECU, 1.4-1.6 bar, FWD auto)
name   : gerard van vught
tel    : +27-21-696 0331 (h) / 082 923 9609 (cell)
url    : http://www.poboxes.com/gerard/
e-mail : gerard@poboxes.com  / han.solo@galaxycorp.com