[Tigers] Speed Driven Gear Questions have...

[Larry Mayfield]

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....

mayf

-----Original Message-----
From: e.coiner at cox.net [mailto:e.coiner at cox.net] 
Sent: Tuesday, December 6, 2016 6:09 AM
To: Larry Mayfield <drmayf at mayfco.com>
Cc: Larry Mayfield via Tigers <tigers at autox.team.net>
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 <tigers at autox.team.net> 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
> 
>  
>