Sam, I also did some highway driving using the tach as
a speedometer. It sounds to me like your estimations
are correct. One suggestion, it is fun and useful to
use the mile markers provided by the highway dept. and
a watch with second hand to measure your actual speed,
then you'll know for sure.

Doran, '90 Weekender Carat.

--- sam pacifico <samhp@EXECPC.COM> wrote:
> I will be starting a long, 3000 mile , trip on
> Friday in my Vanagon with
> a broken speedometer.  I have ordered a replacement
> " cluster" from a
> used auto parts recycler, we used to call them
> junkyards, but it may not
> be here on time.  I have been using the tachometer
> as a rough estimator
> for speed, about 3000 rpm I think equates to slow
> highway speed with
> about 3400 rpm keeping me up with legal traffic, and
> 3800 rpm moving me
> with the faster traffic.  Can anyone provide me with
> rpm vs mph data
> from their experience?  I really don't want to drive
> 3000 miles at at
> 3800+ rpm.  Sam
>

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