[Fot] Rear End Ratios

[EDWARD BARNARD]

A long time ago I did the same 28% ratio. I believe it is from an A/H 100-4 or
100-6. I bought it from John Esposito. Found it quite strange because the O/D
ratio was actually higher then the next gear ie. 2nd O/D was taller then 3rd
straight; 3rd O/D was taller then 4th straight.
Your shifting became 1st, 2nd,
3rd, 2nd O/D, 4th, 3rd O/D, 4th O/D. Quite illogical as Spock would say. 
I
removed it and swapped for a TR overdrive. The 28% is still doing duty in a
street car where the owner was worried for nothing more than rpm reduction.
-Ed-
 

________________________________
 From: TR4 Tony <tr4.tony at virgin.net>
To: Tony Drews <tony at tonydrews.com> 
Cc: "<fot at autox.team.net>"
<fot at autox.team.net> 
Sent: Tuesday, July 2, 2013 2:55 AM
Subject: Re: [Fot]
Rear End Ratios
  

Another option may be to run a different overdrive ratio,
depending on the
type of unit you have.

I'm running an A type with a
28percent reduction and I believe that Chris
Marx is running a j type which
gives 25, a few other ways to drop the final
drive and max revs.

Regards
Tony

Sent from my iPhone

On 2 Jul 2013, at 03:51, Tony Drews
<tony at tonydrews.com> wrote:

> I only run a couple hundred RPM higher at the
end of the straights at RA
than at VIR or Atlanta.  With a 4.1 and OD and 60
series tires, I'm at 5300 to
5500 coming into turn 5 and if I take the kink
right I am about there going
into Canada Corner.  I think I was in the 5200 to
5300 range when I was
battling you on the back straight at VIR.
>
> You should
be fine.
>
> Tony Drews
>
> At 11:57 AM 7/1/2013, john hasty wrote:
>> The
overall ratio we have in the TR3A is 3.7 achieved with a 4.1 rear end
>> and
overdrive.  At VIR, Road Atlanta, Savanna and Mid Ohio, all with long
>>
straights, we are turning 6200 at the end of each of them.  Elkhart Lake
has
>> longer straights and we are concerned that we might need a taller rear end
>> gear.  If we put 3.7 rear end gears in we would have an overall ratio of
>>
3.66 which I believe would produce 800rpm less or the same as turning
>>
7000rpm with the 4.1. I can't turn 7000 with a stock crank so;   Does
anyone
>> with experience at Elkhart have a suggestion?   What do you run there?
>>
Thanks guys/gals......
>>
>> John H. Hasty
>> Attorney At Law
>> Guthrie,
Davis, Henderson & Staton, P.L.L.C.
>> 719 East Boulevard
>> Charlotte, North
Carolina 28203-5113
>> Tele: (704) 372-5600
>> Fax: (704) 372-4601
>> E-mail:
jhhasty at gdhs.com
>> www.gdhs.com
>>
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