I have installed a 1973 350 with 305 heads on it.
These heads have 58cc combustion chambers, it is
running about 10:1 compression. When the valves were
done, I took a die grinder to the heads and removed
any sharp edges in each chamber. These are a major
contributor to "pre ignition". The engine also has a
mild cam installed. I don't get any pre-ignition on
mid grade pump gas.
Jim Nordwall
1950 3100
Jacksonville,ILL
--- Terry Stellman <STELLMAN@noex.com> wrote:
> Does anyone out there have any experience running
> 10:1 compression and pump
> gas? I'm looking for experiences good or bad. When
> I run through all the
> calculations it looks like it will be ok but I'm
> looking for some
> reassurance. By the way this is in a 383 Chevy.
> Thanks.
>
> Terry Stellman
> 1949 3600
> Missouri City, Texas
> oletrucks is devoted to Chevy and GM trucks built
> between 1941 and 1959
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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