Insane speed in german cars... [Maxima] (+ tire slip andstuff)

[jason@scirocco.org (Jason)]

At 04:08 PM 11/6/2002, Allyn wrote:
>** an important note is that even with an accurate speedo, going for top end
>results in increased slip at the driven wheels (due to compliance of the 
>rolling
>rubber itself). speedos are linear, but the effect of slip is exponential
>(follows effect of wind resistance). at <85 or so, the slip is still 
>small, but
>becomes large enough at the limit to throw indicated speed off by as much as
>10-15%, depending on the type of tires.

Hey Al,
         Slip?  Not sure I follow you... Slip between pavement and tire?  I 
hope not at 140mph! :)
Jason





>hth
>Al
>
>
>----- Original Message -----
>From: "Robert Piwonka" <tpiwonka@ttacs.ttu.edu>
>To: <scirocco-l@scirocco.org>
>Sent: Wednesday, November 06, 2002 12:48 PM
>Subject: RE: Insane speed in german cars... [Maxima]
>
>
> > Ok let em clarify the downhill section was through a turn as well and top
> > speed was not reached there but in the half mile strait following(this was
> > flat).  Also this was a maxima se... different engine than just the v6
> > maximas.  I feel the speedometer is more accurate than a scirocco one :)
> > Maximas are fast cars for those of you who have not ridden or driven in an
> > se.
> >
> > Robert Piwonka
> >
> > -----Original Message-----
> > From: scirocco-l-admin@scirocco.org
> > [mailto:scirocco-l-admin@scirocco.org]On Behalf Of Jason
> > Sent: Wednesday, November 06, 2002 9:46 AM
> > To: Robert Piwonka; scirocco-l@scirocco.org
> > Subject: RE: Insane speed in german cars... [Maxima]
> >
> >
> > At 12:16 AM 11/6/2002, Robert Piwonka wrote:
> > >I have not been following this topic but since we are talking about top
> > >speed a 92 maxima se 5 spd can do 145MPH stock.  This was down hill into a
> > >flat staight and assuming the speedo was correct(no reason it shouldn't
> > be).
> >
> > Many speedometers are quite off, and get more so at higher speeds
> > unfortunately.... even on new cars with electronics.  C&D actually did a
> > nice report about this a few months ago...
> >
> > The reason is essentially that the law insists that speedometers do not
> > read _low_.  They can read up to 7% high up to 85mph IIRC.  That would
> > probably mean around 12% high at 120mph, or an indicated 134mph FWIW.
> >
> > I thought the V6 Maximas were limited to 131mph though... (H-Rated tires)
> >
> > Either case, top speed downhill doesn't exactly mean "top speed". :)
> > Jason
> >
> >
> >
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