Gateways to turbos

[PDQSHIP@aol.com]

In a message dated 96-03-14 00:15:14 EST, you write:

>    Audi made a number of "running changes" in mid-'89 to the 200T(Q).
>These included higher C.R. (7.8 to 8.4); dual knock sensors; smaller turbo.
>(They also made some non-performance-related changes, including dual
>inside temperature sensors and more wood.)  The rated HP stayed the same

 86-89.5 10v turbo MC (introduced- Jan 1985) motor is rated at 162BHP @5500
and 177lbs/ft torque@3000, there was no "claimed" output change with the
addition of the k24 to the 89.5 thru 91 10vturbo

>(157 @ 5500), but the torque increased (from 166 to 177 @ 3000).  I was
.......
>responsiveness was quite noticeable-I bought the '90 for this reason, and
>only found out later that the higher C.R. and smaller turbo were the
>reason. 

The fuel injection system is different, computer different, IC, cam profile,
and some other small but noticeable improvements occurred during the upgrade
to the 89.5 motor, all designed to increase low end feel, but given the same
output numbers @3k and 5.5k, it is really a matter of % torque available at a
lower rpm........

> The smaller turbo limits the peak HP of a modified car (I've
>measured 200 HP at 1.8 bar in mine), but sure works better in traffic.

ignition and cam advance in the MC motor can make the early motor as good as
the later.....  The computer upgrades to the 89.5> 10vt motor are limited as
well.....   The 89.5 - 91.0 10vturbos used the k24 unit found in the 91
20v200 and the S4.....  Low end throttle response was the object of the
change, but high end airflow is less than the k26.....

Scott