[MR2] Dyno testing
Ted Volkman
tvolkman at gmail.com
Sat Aug 25 10:25:53 EDT 2007
my source says 87% actually.............
On 8/24/07, Brian Hill <rbrianhill at gmail.com> wrote:
> 83% of all statistics are made up on the spot.
>
> Brian
>
> -----Original Message-----
> From: mr2-bounces at mr2.com [mailto:mr2-bounces at mr2.com] On Behalf Of Ken
> Meyer
> Sent: Friday, August 24, 2007 6:48 PM
> To: Ted Volkman
> Cc: MR2 List
> Subject: Re: [MR2] Dyno testing
>
> Lies, Damn Lies and Statistics...
>
> Ever see that book: "How to Lie with Statistics"? A classic, and the
> "displaced origin" is prominent among the cited perps.
>
> Ken M.
>
>
> -----Original Message-----
>
> From: Ted Volkman [mailto:tvolkman at gmail.com]
> Sent: Friday, August 24, 2007 3:15 PM
> To: kmeyer at blarg.net
> Cc: MR2 List
>
> Subject: Re: [MR2] Dyno testing
>
> most of the links on this page speak only about race-technology products.
>
> http://www.race-technology.com/press_releases_8_951.html
>
> however the 4th link down gives the article donald was probably referring
> to.
>
> http://www.race-technology.com/upload/AX22_Car_and_Driver_050404.pdf
>
> the article has alot of good information. i do not like their graphs
> though. they are a bit deceptive at first glance. make sure you look at
> the numbers, not just the bar sizes (the x axis does not start at
> 0)
>
> --
> ted
> 93na->3sgte, t3/t4 (sw21)->gen3, 264s
> 94T 6 speed, aem, etc...(jza80)
> 89na (aw11)
> 88sc (aw11)
> 98 honda vfr800
>
>
> On 8/24/07, Ken Meyer <kmeyer at blarg.net> wrote:
> >
> > Have you ever checked to verify 1/4 times recorded by the track
> > systems,
> or
> > 60 - 0 with measured distances?
> >
> > Ken M.
> >
> >
> > -----Original Message-----
> >
> > From: Joseph Obernberger [mailto:joelori at earthlink.net]
> > Sent: Friday, August 24, 2007 2:21 PM
> > To: kmeyer at blarg.net
> > Cc: Ted Volkman; MR2 List
> >
> > Subject: Re: [MR2] Dyno testing
> > The GTech meter also measures 60-0 distance (braking distance),
> > 0-60MPH times, 1/4mile times, and lateral acceleration (assuming you
> > have a
> suitable
> > skid pad). For some of those you need to know speed and distance.
> >
> > Joe
> >
> > Ken Meyer wrote:
> > F [between tire and road] = ma, and T = F x tire radius x gear ratio x
> > <a
> constant> [neglecting friction and drag losses] and HP = T x RPM x
> > <a
> constant>
>
> So, unless you want to run virtual drag-races, why do you even
> > need the
> speed and distance calculations?
>
> Ken M.
>
>
> -----Original
> > Message-----
>
> From: mr2-bounces at mr2.com [mailto:mr2-bounces at mr2.com] On
> > Behalf Of
> Joseph Obernberger
> Sent: Friday, August 24, 2007 12:10 PM
> To: Ted
> > Volkman
> Cc: MR2 List
>
> Subject: Re: [MR2] Dyno testing
>
> The new GTech meter
> > contains 3 accelerometers to measure acceleration in
> all three directions
> > (forward/back, up/down, left/right). This make the
> acceleration measurement
> > extremely accurate - and hence the speed
> measurement accurate, and hence
> > distance accurate.
> It also picks up RPM from the cig lighter.
>
> When you set
> > it up, you tell it vehicle weight+your weight. You also go
> through an RPM
> > setup so that it can measure RPMs accurately.
> Next you setup the
> > accelerometers.
> You can then download the stored data, and view it using the
> > included
> software - it's pretty slick.
>
> Joe
>
> Ted Volkman wrote:
>
> > occasionally higher math is actually useful :) calculus and physics
> definitely make more sense when you can relate them to something.
>
>
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>
> >
>
>
>
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