I have an Excel spreadsheet that lets you plug in tire circumfrence,each gear
ratio, rear end ratio and rpm and calculate speed. If you use Excel, or want
to convert it, let me know and I'll send you a file (if I don't get swamped
with requests.....fat chance)
>Date: Mon, 2 Sep 1996 10:51:15 -0500
>From: Gary <speckman@coredcs.com>
>Sender: owner-vintage-race@triumph.cs.utah.edu
>To: vintage-race@autox.team.net
>Subject: math question
>
>>
>>I believe there is a formula for roughly figuring your top speed that
>>involves computing the size of the tire, the rear axle ratio and the
> engine
>>RPMs. Can anyone help?
>>
>>the formula for vehicle speed in MPH per 1000 RPM =
>
> 60,000
> _______
> diff ratio x wheel revs per mile
>
>take that number and mutiply by the number of rpm(per 1000) and you get
>vehicle speed at any particular RPM.
>
>
>
>You need to know the rolling radius of your particular tire, easy to
> measure.
>
>Gar
>
>
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