[tech]: compression ratio: 9a vs. pl

[pbureau@attbi.com (pbureau@attbi.com)]

besides the GTi 1.8L head is not 8.5:1 compression its 
9.2:1 I beleive normally
--
====
ATS - Patrick Bureau
1985 8v Euro GTX 3A/JH Project
1988 16v Euro GT Project
> Patrick, please explain how it is that the 8v motor compression ratio goes
> down like that. With a greater cylinder volume in the 3A compared to the JH
> (2.0l versus 1.8l) how can the ratio be diminished when the head (and
> combustion chamber cc) stays the same and the pistons are similarly
> dished? -or are they?
> 
> I dunno, I recall my CR shooting up to 10:1 when I did the 3A bottom plus 8v
> GTI head.
> --
> Scott F. Williams
> NJ Scirocco nut
> '99 Subaru Impreza 2.5 RS
> Mazda 323 GTX turbo "assaulted" vehicle
> Golf GTI 16v "rollycar"
> ClubVAC: "Roads found. Drivers wanted."
> 
> > -----Original Message-----
> > From: scirocco-l-admin@scirocco.org
> > [mailto:scirocco-l-admin@scirocco.org]On Behalf Of pbureau@attbi.com
> > Sent: Tuesday, May 07, 2002 7:00 PM
> > To: Josh Hignight
> > Cc: scirocco-l@scirocco.org
> > Subject: RE: [tech]: compression ratio: 9a vs. pl
> >
> >
> > JH/3a yeilds about 9.5:1 if head shaved, you can get 9.8-
> > 10.1:1 maybe
> >
> > --
> > ====
> > ATS - Patrick Bureau
> > 1985 8v Euro GTX 3A/JH Project
> > 1988 16v Euro GT Project
> > > So what does the compression wind up being when you mate a 1.8
> > head to a 2.0
> > > block?
> 
> 
> 
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