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Re: [Fot] Rear End Ratios

To: Tony Drews <tony@tonydrews.com>
Subject: Re: [Fot] Rear End Ratios
From: TR4 Tony <tr4.tony@virgin.net>
Date: Tue, 2 Jul 2013 08:55:19 +0100
Cc: "<fot@autox.team.net>" <fot@autox.team.net>
Delivered-to: mharc@autox.team.net
Delivered-to: fot@autox.team.net
References: <CEE0CDB1E81B4383A7382EC87AB7818B@gdhs.local> <20130702025137.E5C8042758@autox.team.net>
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@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@gdhs.com
>> www.gdhs.com
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