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

[Daniel Shane <daniel.shane@xxxxxxxxxxxxxx>]

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@xxxxxxx" <Soma576@xxxxxxx> 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@xxxxxxxxxxxxx
> 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
> 
> 
> 
> --- In dmcnews@xxxxxxxxxxxxxxx, "gullwingmag" <gullwing-
> magazine@...> wrote:
>> 
>> Thanks for clearing that up.  I agree with Mark L... we need to
> use a 
>> standard reference so there is no mis-quoting.
>> 
>> Ron
>> 
>> --- In dmcnews@xxxxxxxxxxxxxxx, Martin Gutkowski - DMC Ltd
>> <martin@> wrote:
>>> 
>>> This is the problem with mis-quoting. I was talking about
>> horsepower at 
>>> the wheels. This is very different from hp at the flywheel which
> is 
>>> where Houston (and all the manfucaturers out there) quote their
>> best 
>>> figure. The dyno session I know about (wasn't there) on a DMCH
>> Stage II 
>>> hit 130 at the wheels. The Alpine I was with at a rolling road
> was 
>>> measured at 43hp drag in the transmission, but it's not an exact
>>> science. That hit 260+hp at the wheels from a chargecooled 3
> litre 
>> turbo 
>>> running 1.2 bar of boost (18psi) so you can understand my
>> skepticism 
>>> that ANY 3 litre naturally asp 12v PRV can hit 210 at the
> wheels, 
>>> especially when running K-Jet.
>>> 
>>> Martin
>>> 
>>> gullwingmag wrote:
>>> 
>>>> --- In dmcnews@xxxxxxxxxxxxxxx <mailto:dmcnews%
>> 40yahoogroups.com>,
>>>> Martin Gutkowski - DMC Ltd <martin@>
>>>> wrote:
>>>> 
>>>> (by comparison, Houston's Stage II is roughly 130-140 on a
> good 
>> day).
>>>> 
>>>> Isnt this the engine DMC Houston advertises at 197hp? Did you
>> actually
>>>> dyno the Stage II and only get 130-140hp?? Who should we
>> believe???
>>>> 
>>>> Ron
>>>> 
>>>> #1529 Screamin Yellow D
>>>> 
>>>>  
>>>> 
>>>>  
>>> 
>>> 
>>> 
>>> 
>>> [Non-text portions of this message have been removed]
>>> 
>> 
> 
> 
> 
> 
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