You need to increase the combustion area with 12.4 cc
to go from 9.5:1 to 8.0:1 which would be a 1.9 mm thicker
head gasket. That is if the cylinder holes are exactly the
same diameter as the bore size. Stock head gasket is
usually 1.2 mm thick (I dont know on the U20).
Thomas
Daniel Neuman wrote:
> Nope not Turbocharging just curious if there was an easy
> not super expensive way to lower the CR.
> Of the options that I have heard so far if I could get a
> thicker copper head gasket to seal that would be the way
> to go.
> Daniel 69 2000
> Oakland CA USA
>
>
> > Turbocharging?
> >
> > Thomas
> >
> > Daniel Neuman wrote:
> >
> > > Hello All,
> > > Is there any sensible way to lower the CR on my
> > > Solex U-20 from the stock 9.5:1 to say 8:1 ??
> > > Thanks,
> > > Daniel 69 2000
> > > Oakland CA
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