On Sun, 04 Jan 1998 23:38:08 -0500 Jim Stuart <jimbb88@erols.com> writes:
>Apples & oranges. With 15" wheels, T-5 with.63 5th gear, 3.00 ratio, my
>original rear, 70 mph at 2000 rpms.
>every thing the same except 3.50 rear, 59 mph at 2000 rpms. Have not had
>a chance to hit 70 to check rpms, will do that tomorrow on the way to
>work.
Hmm, I say 2350 rpm?
>My roadster with T-50 trans, 14" wheels & 3.00 rear, 5th is .73, 70 mph
>is 3000 rpms. You need to do the math to see if the 3.90 is suitable,
>depending on your driving style. Most of my driving is Beltway &
>Interstate in the 60-75 mph range. A steady 3000 rpm is OK, but I would
>not like to run the engine much faster than this for extended use.
With 195/60X15 tires, .63 5th gear, 3.9 rear end my math says 3000 does
86 mph. I'm not sure this is correct. I tried to logon to
<http://devserve.cebaf.gov> but couldn't get on. I'll try the web site
again tomorrow.
See Ya
Larry Hoy, Denver, CO USA (still looking for a Buick bell housing)
1969 MGB Roadster (one half of a V8)
1987 Jaguar XJ6 Vanden Plas
It's not how fast you go, it's how fast you go fast.
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