Thanks for the reply Joe-somehow it means more coming from you rather than from
me! ;-)
Laura G.
>
>From: Joe Curry <spitlist@gte.net>
>Date: Tue, 23 May 2000 07:01:59 -0700
>To: James Libecco <jfl@neoucom.edu>
>CC: speedracre@netzero.net, Spit <spitfires@autox.team.net>
>Subject: Re: speedos and rotating diameter
>
>
>Let me weigh in on this one.
>
>There is definately a difference in the tach to speed ratio if everything else
>s not equal. Changing tire diameter will vary the
>speedometer reading , as any tire shop will tell you. Also varying the ratio
>of the differential will change the speedometer reading.
>While you can calculate the speed by doing the proper math, all the elements
>must be taken into consideration. the drive line does not
>end at the back of the transmission where the speedometer cable is connected.
>
>Joe
>
>James Libecco wrote:
>>
>> The speedo to tach ratio still would be constant no matter what the
>> rotational diameter is, but the final road speed will vary tremendously,
>> depending on what the tire size is. On my 76 nonOD spit with my autox tires
>> on, I have to drive an indicated 70mph/4000rpm to stay with 55 mph traffic.
>> Sufficive to say, I do more damage to and from the track than racing.
>>
>> jim
>>
>> Not Really Richard,
>> The Tach is connected to the motor / motor to tranny / tranny to
>> speedo.
>> Its a direct connect so tach to speedo is constant..
>>
>> Pat
>>
>> Bonilla / Colorado wrote:
>>
>> > do we not need gearing ratios, and tire sizes to
>make
>> > this meaningful info?
>> >
>> > richard / colorado
>
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