Re: lowering compression ratio for turbo

["Wing Gee" <winggee@hotmail.com>]

just a few words.. Megasquirt ;-)

Wing
----- Original Message -----
From: "Jonas K." <jkarlsso@metabolex.com>
To: "Jeff Toomasson" <jtoomasson@yahoo.com>; "scirocco list"
<scirocco-l@scirocco.org>
Sent: Wednesday, November 21, 2001 11:03 AM
Subject: Re: lowering compression ratio for turbo


> On 11/21/01 10:13 AM, "Jeff Toomasson" <jtoomasson@yahoo.com> wrote:
>
> > I have 9A 2.0 block (mileage to low to justify ripping
> > it apart) sitting in my carport begging me to do
> > something, anything with it. Need to sell my M3 for
> > funds before I can afford to do anything though.
>
> Hmmm, yeah, must be a tough life... <grin>
>
> Anyway, There's always 8vturbo.com who (contrary to their domain-name)
have
> parts to turbo every watercooled A-series gas VW made.
>
> With the 9A motor you have other options. The 9A has 82.5mm bore, which
> means that any High compression 82.5mm piston from a 2v/cyl VW or Audi
will
> fit. The compression will be drastically lowered due to the difference in
> head combustion chamber volumes between the 8v and 16v heads. The
> compression will roughly be down at 7.5:1 Which works great, and you still
> have the squish area. The cars to look for are:
> 87-up 5 cyl non-turbo Audi 5000/100 or 4000
> 88-90 4 cyl Audi 80 2.0
> 99-up VW 4cyl 2.0
>
> The rods should transfer right over too.
>
> You could also use a VW ABA 2.0l block, but you'd need the whole thing,
and
> transfer over the crank pulley, intermediate shaft, etc. This is what B.
> Honnold is doing.
>
>
> > I'm just still struggling with the dilemma of going
> > with the "traditional" bolt-on's or do something
> > that'll turn heads. The idea of having to feel my way
> > through tuning a turbo'ed system makes me slightly
> > uneasy - it's supposed to be a daily driver
>
> Well, you can do it yourself without too much trouble. If you can remove
and
> install a cylinder head, then you can do this. It would help to have a
> backup car to drive during the install, though. With CIS fueling you're
> going to be limited, and the cost of an aftermarket system is about $1000.
>
> There's no reason why a turbo'ed car would not be a great daily driver.
You
> just have to resist the temptation to "just turn up the boost a little
bit".
> Once you start down that road, eventually you'll overboost and blow up the
> motor as you exceed your ability to pump fuel.
>
> Again, HTH,
> Jonas
>
>
>
>
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