Posted for "George Braly" <gwbraly@gami.com>:

 Douglas,
 
 Re:  370 Hp out of a normally aspirated IO-550 - -
 
 Back here in the HOA  (Heartland of America) we see those engines from
 California put up on our dynos on a periodic basis.
 
 So we have developed a name for the horsepower claims for those engines.
 
 We call it  "BHP(c)".    In a lot of test stands  the BHPc would use the
 little "c" to stand for "corrected"  as in corrected to standard day
 conditions.
 
 But for the engines from the West Coast,  we have a different name for
 the "c".  We call it  "California"  horsepower.
 
 It has gotten so bad that when we talk engines,  the term "California
 horsepower" is often used in, well,  shall we say a "humorous" manner.
 
 Regards,  George
 
 PS.  I am familiar with the dyno on which your engine was tested and it
 is extremely well calibrated.  I have even exchanged engines with that
 dyno and ours to verify they were both calibrated correctly.  They were.