[DML] Re: "Fastest" DeLoreans (WAS: Don Steger's cams)
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[DML] Re: "Fastest" DeLoreans (WAS: Don Steger's cams)



Dan, in the "old days" before the 70's that was true and was the old 
standard of gross horsepower ratings.  However starting in the 70's 
the standard switched to net horsepower ratings, which means the 
engine is dressed as it would be in the car - A/C, power steering 
pump, full exhaust, etc. - and the engine is rated with all 
accessories running.  It is a far more realistic # than the old 
gross ratings.


Sandor
# 3002





--- In dmcnews@xxxxxxxxxxxxxxx, Daniel Shane <daniel.shane@...> 
wrote:
>
> Don't forget that most Horsepower readings are taken with no 
ancillaries
> attacked to the engine.  The engine is normally run without the 
water pump,
> alternator, AC compressor, power steering pump etc attached.
> 
> External water pumps are used to cool the engine so this 
artificially
> increases the power reading as well.
> 
> Dan
> 
> 
> On 29/12/06 16:35, "Soma576@..." <Soma576@...> wrote:
> 
> > I find this discussion interesting, and I would have to agree 
with Sandor.
> > While the hp 'at the wheels' is a more meaningful number and 
takes into
> > account a wide variety of other drivetrain variables, it is only 
useful when
> > comparing to other cars 'at the wheels'.  Unfortunately, 99 out 
of 100 people
> > will tell you what their engine produces at the flywheel (as the 
owner's
> > manual states), so the flywheel horsepower should remain the 
standard rating
> > (as it is with other manufacturers).   Hp 'at the wheels' should 
only be
> > provided along with the flywheel horsepower, in my opinion.
> >  
> > Andy
> >  
> >  
> > -----Original Message-----
> > From: piszar@...
> > To: dmcnews@xxxxxxxxxxxxxxx
> > Sent: Fri, 29 Dec 2006 9:22 AM
> > Subject: [DML] Re: "Fastest" DeLoreans (WAS: Don Steger's cams)
> > 
> > 
> > To add 2 cents to the discussion, auto manufacturers do not 
measure
> > their HP at the rear wheels (that is typically a measurement to
> > track increases in performance from incremental engine 
improvements
> > for racing cars).  Why should DMCH be any different than other
> > manufacturers?  
> > 
> > There is enough Delorean confusion among the general public as it
> > is, measuring HP at the wheel would only seem to add to that.  
Not
> > to mention the fact that it is a lower number than when measured 
at
> > the flywheel and becomes an apples-to-oranges issue when 
comparing
> > to other vehicles.
> > 
> > 
> > Sandor
> > # 3002




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