John,
87MM TR4s are about the same. I shift at 3000RPM when just
tooling around and shift as the tach needle hits 3800-4000 when
laying it on.
Brian Sanborn
62 TR4 CT16260L - Groton, MA
My TR4 Restoration Web Site
http://www.net1plus.com/users/sanborn/Home.html
E-Mail: sanborn@net1plus.com
-----Original Message-----
From: owner-triumphs@autox.team.net
[mailto:owner-triumphs@autox.team.net]On Behalf Of John Cowan
Sent: Tuesday, July 25, 2000 2:16 PM
To: triumphs@autox.team.net
Subject: TR-2/3A: Best shift point when upshifting?
This is a curiosity question for those of you driving
TR-2/3As with
the 1.991 Liter engine and the 3.7 rear end. I wonder what shift
point you
and the car 'like' when upshifting; i.e., at what RPM do you
upshift?
Shifting at a point just past the shoulder of the torque
curve gets
you the best acceleration, since when you upshift, you then
drop to just below the shoulder and are in the right position to
accellerate in the higher gear.
The torque curve in the shop manual says max torque is118
ft-lbs
between 2500 and 3700 RPMs. Also, the right point is often
discernable by
feel. I have my own preference, but am interested in the
experience of others.
Thanks.
John Cowan
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