Re: 1.8l 8v turbocharging

["Kris Rayner" <veritech@fix.net>]

Well, whether you need to lower compression or not depends on the 
current compression ratio and how much boost you plan on running.  If 
it's the 8.5:1 I've heard of people going as high as 9lbs of boost 
before having any detonation problems.  In which case you can use an 
Audi 5000 fuel pressure regulator or do something else.  I know of 
somebody that wired in the cold start valve to spray off an on when 
the turbo reached a certain pressure and it solved his detonation 
problems.  If it's a 10:1, you'll have to run such low boost, you 
might as well lower the ratio.  The right way to do it is to mill the 
pistons.  There are some other things people have tried, but 
realistically, that's the only way for it to be done right and make 
the motor last as long as possible with the fewest problems.  This is 
all IMHO.

> Date:          Sun, 30 Aug 1998 23:09:14 -0400
> To:            scirocco-l@scirocco.org
> From:          Paul Hanley <credere@worldnet.att.net>
> Subject:       Re: 1.8l 8v turbocharging

> >Does anyone on this list have, or know of people putting turbos onto 8v's
> >(any VW i s'pose, jetta, golf, etc.), do you need to lower compression or
> >get any new engine parts?
> 
> Yip, you will need to lower your compression.
> 
-----------------------------------------------------
                   Kris Rayner
    1981 VW Scirocco S - Soon to be a 16V :)-
            "What, behind the rabbit?"
                veritech@fix.net
        http://www.geocities.com/Tokyo/2422/
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