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Old 03-03-2003, 02:33 AM   #23
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Join Date: May 2002
Location: Thornhill
Posts: 1,596
Its not really compressed air pushing down on your pistons. More air is mixed with more fuel which creates more combustion which gives your pistons more force to move up and down etc...

This raises two problems:

1.) temperature
2.) physical stresses on engine components as a result of this 'force'

and the solution to both problems are:

Forged internals

F/I can be just as reliable as N/A
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