look at page 6 on this url
"Not only are there
thermal dimensional changes, but these
changes are far from uniform throughout
the bore. The major effect is the gross
dimensional change in bore diameter,
which can change .0005 - .001” of
an inch, per inch of bore diameter, at
temperatures between 65°F and 210°F.
For a common 4” bore, this equals .002
– .004” of growth."
According to research done by KW, in
addition to the amount of average bore
size increase, the average difference from
cylindrical in the heated and pressurized
bore seems to be around .0015”. This
change can be several times the change
seen with torque plates.
"Not only are there
thermal dimensional changes, but these
changes are far from uniform throughout
the bore. The major effect is the gross
dimensional change in bore diameter,
which can change .0005 - .001” of
an inch, per inch of bore diameter, at
temperatures between 65°F and 210°F.
For a common 4” bore, this equals .002
– .004” of growth."
According to research done by KW, in
addition to the amount of average bore
size increase, the average difference from
cylindrical in the heated and pressurized
bore seems to be around .0015”. This
change can be several times the change
seen with torque plates.
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