RE: More Power for the 5cyl without turbocharging

[Mark Nelson <mnelson@brls.com>]

<<Howdy. does anyone know how much poop you can wring out of one of
these
without a blower?>>

Paul Timmermann had some ideas about putting a Vortech Super Charger on
a 20V NA motor, to specifically help '90/'91 CQ 20V owners, who complain
about not having enough power. 

<<I'm looking to building up my already strong rally
motor.  I would love to crush the Jap turbo junk that I rally against
What kind of head work would you guys recommend?>>

HEY, HEY, HEY!!!  Watch the comments on the Rice Burners. =) Our ex-323
GTX (now Paul Timmermann's) will do circles around a stock CQ.  Anyway,
if the Japanese motors are *so* bad, then why are they so successful in
the Pro Rally series here in the US and in the WRC in Europe???  I love
Audis a lot too, but after driving that 323 GTX and finding out what a
forgiving car it is, and how much power it makes_and_can_make, I
will_not ignore the potential some of those cars have for being
successful in rallying.

As I'm learning, there are several factors that need to come together,
in order to be successful.  You need an engine with a good wide power
band that has some VERY good cooling.  I'm discovering that this, in
combination with a durable car, will provide the means to be very
competitive.  The last, and in my mind the most important factor, is a
good driver and co-driver.

Anyway, sorry for rambling on, but I'm not very up to speed on
Supercharging.  I'm building a 20V Turbo motor w/ a K27 Turbo and an
electronic waste gate for my S2, and have a pretty good idea of the kind
of power I will be generating.  The first engine being built is going to
be a good powerful engine, but also be an attempt at reliability as
well.  Once we get an idea of how well the engine is performing in
various conditions, we will go about the task of building a more
powerful and state-of-the-art (i.e. $$$$$) engine.  As far as
Supercharging goes, you may want to get an SCCA Pro Rally rule book, if
you don't already have one, and read up on Supercharging.  I can ramble
on and tell you all about restrictor requirements:displacement:car
weight for Turbo motors, but it won't do you much good as far as
Supercharging goes.  I can tell you to start off with that you are
limited to 5.1L displacement, with the weight and turbo charging
factored in as well.  My own personal opinion is that it would be
easiest to turbo your motor using a K26 Turbo running mild boost and/or
possibly lower compression pistons in combination with a turbo..

Maybe someone else on the list, who may have looked into Supercharging,
can give you some more details.

Best Regards,

Mark Nelson
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mnelson@brls.com				Borealis Technology Corp.
SQA Engineer				http://www.brls.com
Incline Village, Nevada			Carson City, Nevada

1990 Audi S2 Quattro (Building for SCCA Pro Rally)

Past Audis: 1987 5000CSTQ, 1987 5000CSTQW
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