Alpines List Archive

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Mail From: "Bill Blue" <(email redacted)>

I have been doing some calculation of engine speed for different ratios. If
you have a 4.22 and are running 195-70 13 tires (the closest modern size
O.D. to the "original" radials) you should be turning 3890 RPM at 65. With
a 3.89, you are running "only" 3585 RPM. By the way, we drove faster than
65 back then for long stretches at a time. (Even though the interstate
system was fragmentary, Indiana's state highways had a speed limit of 65, so
we normally drove about 70 or so). The only difference between then and
now: it was rare for anything but the little sporty cars to have tachs, so
we had nothing to relate 3900 RPM's to. We just knew we were buzzing down
the highway.

-----Original Message-----
From: (email redacted)
[mailtoemail redacted)]On Behalf Of
(email redacted)
Sent: Monday, June 25, 2001 9:28 PM
To: (email redacted)
Subject: Re: Overdrives


Gauges? We don't need no stinkin gauges. My tach and speedo wave at each
other who needs them. Just speed up until you are doing the passing. Jim

Tom Yang wrote:

> Hello All,
>
> With all this talk of Overdrives, here's a question from someone without
an
> overdrive. Someday, I'll get one, but until then, does anybody know how
> fast the Series V engine is approximately turning at 65 mph? My tach
> doesn't seem to be calibrated, and changes its readings realtive to
> temperature! I doubt the Speedo is right either, but these faults I can
> live with as long as I'm not reving the engine too high...or should I just
> stay in the right lane and watch the tractor trailers pass by?
>
> Tom

This read-only message was archived from a public mail list.
Mail From: Tom Yang <(email redacted)>

Hi Bill,

Although the revs are high, I guess I can live with them until I get an
overdrive! Thanks to everyone who sent me numbers, on and off list!

Tom

Message text written by "Bill Blue"
>
I have been doing some calculation of engine speed for different ratios.
If
you have a 4.22 and are running 195-70 13 tires (the closest modern size
O.D. to the "original" radials) you should be turning 3890 RPM at 65. With
a 3.89, you are running "only" 3585 RPM. By the way, we drove faster than
65 back then for long stretches at a time. (Even though the interstate
system was fragmentary, Indiana's state highways had a speed limit of 65,
so
we normally drove about 70 or so). The only difference between then and
now: it was rare for anything but the little sporty cars to have tachs, so
we had nothing to relate 3900 RPM's to. We just knew we were buzzing down
the highway.<