[Fot] 4.875:1 diff ratio?

[Rocky Entriken]

That'll be a nice ratio if you want to go autocrossing, commonly called a 
4.88. Not so much for highway driving. For racing it depends on  the track 
(a "busy" low-speed track yes, Road America no)

With that many teeth (because they are thinner, less beefy), If you're 
driving in competition I recommend you have the gears shot-peened first. It 
strengthens the metal. I speak as one who's gone through several 4.55 
gearsets, then a friend who does that kind of work told me about it and I 
had it done to my current one (the last spare I had).

--Rocky Entriken

----- Original Message ----- 
From: "Robert MacKenzie" <list at mackenzie.aero>
To: "'Barr, Scott'" <sbarr at McCarty-Law.com>; "''Friends of Triumph'Triumph'" 
<fot at autox.team.net>
Sent: Monday, September 30, 2013 9:17 AM
Subject: Re: [Fot] 4.875:1 diff ratio?


> That is a Herlad 948 diff you have there.
>
> Robert
>
> -----Original Message-----
> From: fot-bounces at autox.team.net [mailto:fot-bounces at autox.team.net] On
> Behalf Of Barr, Scott
> Sent: Saturday, September 28, 2013 12:16 PM
> To: 'Friends of Triumph' Triumph
> Subject: [Fot] 4.875:1 diff ratio?
>
> We are looking at a Spitfire/GT6 differential which has a 39-tooth ring 
> gear
> and an 8-tooth pinion gear.   If my math is correct, that is a 4.875 
> ratio.
> Is that possible?
>
> If so, has anyone ever used such a beast?
>
> Scott B.
>
>
>
> Scott Barr
> McCarty Law LLP
> (920) 257-2233
> sbarr at mccarty-law.com<mailto:sbarr at mccarty-law.com>
> _______________________________________________
> fot at autox.team.net
>
> http://www.fot-racing.com
>
> Donate: http://www.team.net/donate.html
> Archive: http://www.team.net/archive
> Forums: http://www.team.net/forums
> Unsubscribe/Manage:
> http://autox.team.net/mailman/options/fot/list@mackenzie.aero
> _______________________________________________
> fot at autox.team.net
>
> http://www.fot-racing.com
>
> Donate: http://www.team.net/donate.html
> Archive: http://www.team.net/archive
> Forums: http://www.team.net/forums
> Unsubscribe/Manage: 
> http://autox.team.net/mailman/options/fot/rocky@spitfire4.com