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Measuring
Combustion
Chamber Volume |
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When building a
maximum
performance
engine, or just
figuring out
what your
compression
really is,
measuring
combustion
chamber volume
is necessary.
Piston
manufacturers
advertised
compression
ratio can be off
due to
manufacturing
tolerances.
Measuring and
adjusting
compression
accordingly is
the only way to
be sure your
compression is
exactly what you
want. When
pushing the
limits on a
maximum
performance
build, a half
point of
compression can
make the
difference
between a good
running motor or
one that’s hard
starting and
pings. |
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Compression
Releases |
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Compression
releases can be
electrically or
manually
operated. S&S
offers the
electric type
for their heads.
They work great
and the rider
does not have to
remember to use
them. Just push
the engine start
button and the
compression
releases operate
automatically.
The manual type
can be installed
in stock heads.
These help on
big inch high
compression
engines. The
only down side
is the rider
must remember to
use them. |
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Decking Heads |
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Decking heads is
something we do
regularly to
adjust
compression or
true up gasket
surfaces.
Moderate
increases in
compression (.5
to 1 point) can
be achieved by
machining the
head. If you are
trying to go
from 8.5:1 to
10.5:1, changing
pistons would be
a better option. |
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Flywheel
Balancing |
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Balancing is not
necessary if the
flywheels were
properly
balanced
previously and
the piston
weights are the
same. However if
piston weights
are different or
you change rods
this step
becomes
mandatory. We
can assemble and
true your
flywheels.
Flywheels are
rebuilt with new
crank pin,
bearings and
flywheel
washers. New
shafts are used
depending on
model.
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95" Kit |
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We do 95”
conversions on
Twin Cams. There
are a lot of
choices on cams,
compression
ratios and
heads. Come in
and talk to us
about the best
combination that
matches your
riding style. |
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