OT - Bugatti, Rolls power meter

[haygood at myway.com (Brian Haygood)]

You could put a load cell on the front or rear engine mount and run the car on a dyno to calibrate it.  That would give you an estimate of torque.  Monitor the RPM of the engine and do some quick calculating and it could spit out Hp.  



Most GTech type things (VC2000, etc.) use an accelerometer within them to measure acceleration, and output a single number for peak hp per 1000lbs.  The VC2000 gives you a readout of the acceleration as it runs, I think, so that would give you what you are looking for.  









 --- On Tue 01/10, GGehrke < ggehrke@gmail.com > wrote:

From: GGehrke [mailto: ggehrke@gmail.com]

To: scirocco-l@scirocco.org

Date: Tue, 10 Jan 2006 11:11:59 -0500

Subject: Re: OT - Bugatti, Rolls power meter



Those Palm pilot based "performance computers" (similar to the GTech<br>etc) use the OBD2 diagnostics to estimate Hp.  From what I've read<br>they're not as accurate as a good accelerometer version, but<br>apparently they can calculate it from the engine parameters and speed.<br> And I would imagine that the Bugatti and Rolls use slightly more<br>sophisticated sensor networks than basic OBD2...<br>The only calculations I know of dealing with Hp all revolve around<br>measuring torque, though, so I don't know off hand what the equations<br>and such would be.<br><br>Makes me miss my fuel economy gauge and in dash computer thing in our<br>BMW, though.  That thing is great - Fuel economy, average speed,<br>timer, time at destination prediction, range on fuel remaining,<br>outside temp...<br><br>-Grant-<br><br><br>On 1/10/06, Greg Pallett <greg.rocco@gmail.com> wrote:<br>> I was doing my normal commute today, and I was gassing it in 2nd and<br>> 3rd gear to shoot through some 
traffic.  It got me to wondering how<br>> much of my cars 108.5  (dyno'd) hp I'm using.<br>> The new Bugatti Veryon and the Rolls Royce both have power meters, to<br>> tell you how much you're using at any given time.<br>> How do they measure this?  Is it similar to the vaccum gague fuel<br>> economy gages I've seen in other cars? How would such a meter work,<br>> and *could* a similar device be fitted to the car of one's choice?<br>> Alright, all you technical engineer-type people, surely you've got ideas!<br>><br>> GP<br>><br>> --<br>> Aronsons First Law<br>> People who do crazy things are not necessarily crazy<br>><br>> _______________________________________________<br>> Scirocco-l mailing list<br>> Scirocco-l@scirocco.org<br>> http://neubayern.net/mailman/listinfo/scirocco-l<br>><br><br>_______________________________________________<br>Scirocco-l mailing list<br>Scirocco-l@scirocco.org<br>http://neubayern.net/mailman/listinfo/scirocco-l<br>

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