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[Fot] Gear ratios?

Subject: [Fot] Gear ratios?
From: tedtsimx at bright.net (Ted Schumacher)
Date: Thu, 11 Jan 2018 09:21:03 -0500
References: <9940DDBC-84D3-4515-AF63-7453C94627AC@comcast.net>
Bud, this works for all manual trans. but will use a 4 speed for 
illustration. Lay gear(cluster gear) 4th divided by main shaft 4th X 
whatever main shaft gear you choose divided by laygear equivalent = 
ratio for that gear. Example - laygear 4th is 33 teeth, main shaft 4th 
is 22 teeth. Main shaft 3rd is 27 teeth and lay gear is 29 teeth. So 33 
divided by 22 = 1.5 x 29 divided by 27 (1.08) = 1.61(3rd gear ratio)

Lay gear (direct) divided by main shaft gear (direct)? X what main shaft 
gear you choose divided by equivalent lay gear = ratio for that gear

On 1/10/2018 5:41 PM, Bud R via Fot wrote:
> Listerati,
>
> I?ve been trying to figure out what gear ratios I have in the gearbox that 
> came with my race car but don?t know how to  do the proper math. The PO told 
> me it was a close ratio GT6 gearbox but one never knows until you actual 
> check.
>
> I at least took some ?data? while it was out so I?m hoping someone can tell 
> me how to figure out the gear ratios and if it is indeed close ratio GT6 
> gears or whatever it might be.
>
> When the input shaft was turned one full rotation the output shaft turned the 
> following amount.
>
> 1st gear it turned 1/4 turn
> 2nd gear it  turned 1 1/8 turns
> 3rd gear it turned 1 5/8 turns
> 4th gear it turned 1 3/4 turns
>
> Any help on how I should do the math is appreciated.
>
> Also does anyone know what happened to the minty lamb gearspeed website? It 
> does not appear to be up any longer and I used to play with it a lot. Very 
> useful site that now appears gone.  Waaahhhh.
>
> Thanks
> Bud Rolofson
>
> Extreme Parts Racing (more than just a haircut)
>
> 71TR6 CC57365 (Good 6)
> 71 Spitfire MK IV Race Car #3
> 69 Spitfire MK III (back up FE engine/dinghy car)
> 93 Minnie Winnie Race Support Vehicle
> 77 Z-50A Hardly Davidson Honda Mini-Trail Bike (Triumph Pit Bike)
>
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-- 
Ted Schumacher
tedtsimx at bright.net
http://www.tsimportedautomotive.com
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