In the novelty division, in 4th gear, my TR-4 with the 3.7 rear end in
overdrive, checks out at 72.6 mph @ 3000 rpms.
Needless to say, I've never run out of rpms on a straight....anywhere.
Richard Taylor
#196
-----Original Message-----
From: fot-bounces@autox.team.net [mailto:fot-bounces@autox.team.net] On
Behalf Of TR4 Tony
Sent: Tuesday, July 02, 2013 3:55 AM
To: Tony Drews
Cc: <fot@autox.team.net>
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@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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