In a message dated 6/14/02 12:50:01 PM Eastern Daylight Time, shook@usc.edu
writes:
<< The fuel injected engines put out 150 bhp, while
the USA post '72's dropped to 101 bhp. That is a loss
of 1/3 of the power. >>
This is common for _all_ cars in the US. In 1973, HP ratings changed from
gross ratings to net ratings.
72 and older ratings were flywheel HP with no accessories running on the
engine( the waterpump could be driven by a external power source also) , dyno
exhaust and air filter.
73 and newer ratings were measured at the output of the transmission with all
accessories running, stock exhaust and air filter.
The 73 and later ratings give a much more accurate picture of what the engine
is really producing.
Harold
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