Wanna have a good laugh about some guy's technical knowledge?

[JShadzi at aol.com]

Definitely not K27, it is made up of parts of the K24/26, but Audi left the K24 designation on the name plate...see Scott's Justosons quote as per www.urs4.com:

<<
  The RS2 is all K26 turbo.  I've had a couple dozen of RS2 and RS2  Competition turbos apart in the past 6 years.  The hot side is based on the smallest of the K26 series housings, with a Porsche spec'd hot side wheel, and the appropriate milling of the housing (which results in a slightly larger downpipe opening).  The center section is stock Audi K26 WC, and the cold side is a K24 cold side housing with a K26 cold side wheel.  The RS2/Comp both use the larger K26 shaft for the wheels.  The RS2 Competition  uses a larger cold side wheel and housing, the hot side stays per early RS2.  What throws most folks off, is that KKK left the K24 designation in their part numbers on the cold side tag.

The actual answer to the years of the K24 cars in the US is up for some discussion.  The audi "claim" is that as of 1989.5 (late MC dual knock MAC-14) Audi switched to the K24 turbo on all I5 turbo applications.  This switch also "supposedly" came with a revised cam profile, flat flywheel (+ different TOB fork), and 2pc exhaust manifold.  IME, 1990 was the bastard year for previous year pieces parts.  I've seen 1990's with single pc exhaust, K26 turbos (but all have had the flat flywheel and the revised cam profile).

As of 1991 + intro of the 20vt cars worldwide, all Audi 20vt (I5 only - thought I'd miss that:) turbo cars except for the RS2, were K24 based turbochargers. 

Maximum boost to the K24 is altitude corrected at 16psi.  At 3200ft the 1991> stock 20vt cars lowered maximum boost threshold to prevent overspin of the turbo.  You guys with modded 20vt computers with K24 turbos should reread that last sentence.

Scott Justusson
QSHIPQ Performance Tuning
>>

So, it would be an easy mistake to make, if you'd ever seen an RS2 turbo, you might have done the same...

Javad



In a message dated Thu, 28 Feb 2002  1:54:53 PM
Eastern Standard Time, Mihnea Cotet <mik at info.fundp.ac.be> writes:

> As for the RS2 turbo, all I know about it is that it belongs at least to
> the K26 family, if not the K27..
>
> Mihnea