The speedo takes 980 revolutions of the speedo cable to indicate one mile on
Not 980 revs of the tire for a mile.
---- Larry Mayfield <email@example.com> wrote:
> Hello, Thanks for the info and reply!
> I went to David Kee top loader pages and found this:
> A black drive gear with 7 teeth pn C4DZ-17285A NOT for Tiger
> A pink gear with 6 Teeth pn C5ZZ-17285A NOT for tiger
> A Yellow gear with 7 Teeth pn DK296-YSG FOR Tiger
> A Brown gear with 8 teeth pn DK286-BSG FOT Tiger
> There are no 6T drive gears for the top loader, at least available anyway.
> With the plethora of driven gears and a pair of drive gears and knowing the
> dire diameter for the revolutions per mile calculation then one should be
> able to come pretty dang close to reality I think. That 8=980 revs per mile
> is a high number due to the dinky OEM tire size sold with the cars. I think
> the overall diameter of the Dunlop 5.90 tires was 20.5 inches which would be
> about right for the 980 res per mile. Tires today are larger and a 205 x 15
> is 23 inches or so in diameter and that results in a lower of revs per mile
> to run the speedo. So, the drive and driven gears need to be selected to get
> that tire back to a pseudo 980 revs per mile. And the rear gear needs to be
> added in as well if it has been changed. Not a terrifically involved process
> but stuff has to be accounted for in order to get a good reading speedo.
> Final fiddling can be achieved internally to the speedo although I have never
> ever tried that.
> Or purchase a GPS unit, lol. Plug and play.... add power, turn on....
> -----Original Message-----
> From: firstname.lastname@example.org [mailto:email@example.com]
> Sent: Tuesday, December 6, 2016 6:09 AM
> To: Larry Mayfield <firstname.lastname@example.org>
> Cc: Larry Mayfield via Tigers <email@example.com>
> Subject: Re: [Tigers] Speed Driven Gear Questions have...
> I believe the Tiger is 6 teeth. 7 is the other common size.
> Other useful info is the Tiger speedo takes 980 revolutions to rack up 1 mile
> on the odometer. Its printed on the face of the speedo in a really small font.
> ---- Larry Mayfield via Tigers <firstname.lastname@example.org> wrote:
> > sparked one from me. What is the number of teeth on the drive gear itself?
> > The one that is on the actual output shaft of the transmission? I
> > suspect there can be a couple of them that could be used. With that
> > gear count and the driven gears available it becomes fairly easy to
> > determine which speedo cable driven gear is best for the car
> > parameters, like tire size, final drive rations etc.
> > mayf
> > _________________________
> > drmayf
> > Worlds Fastest Sunbeam, period.
> > 204.913 mph flying mile
> > 210.779 mph exit (not top) speed