Re: Words change over time

Posted by MarkB_MI on March 28, 2006 at 03:41:34 from (64.31.11.52):

In Reply to: Words change over time posted by jdemaris on March 27, 2006 at 20:12:47:

JD,

I prefer to use the accepted engineering definition of displacement, as opposed to some arbitrary rule cooked up by some racing league bureaucrats. When you buy a car, the advertised engine displacement is not based on some handicapping formula, it's actual engine displacement.

Yes, there are many things you can do to compensate for increased combustion chamber volume. But if you do nothing else, compression ratio and power are reduced as the CC volume increases.

As far as "effective compression ratio" goes, there is no such thing. Supercharging will increase power and combustion chamber pressure, but it does not change compression ratio. Ask any mechanical engineer.

If I google on "engine displacement defined", here's the first hit I get.

• Wikipedia: Engine Displacement

Replies:

• That is rediculous jdemaris 05:58:35 03/28/06 (0)

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