There's a good article on the T5's history here...
http://www.moderndriveline.com/Technical_Bits/t5_history.htm
Here's what they say about the 'Z-spec'...
The "Z" Spec T-5
In 1993 Ford started offering a new service unit to the motorsport crowd.
The "Z" spec T-5 (Ford part number 7003Z, also sometimes referred to as
"World Class T-5". Most folks, associate the term "World Class" as meaning
the best, however world class T-5 were introduced in 1985 as stated ealier.
The T-5z is a 1993 Cobra T-5 with 2.95 first gear set and .63 over drive.
It has the best of everything. Hardened gears, short throw factory shifter,
steel front bearing retainer, and tapered output shaft bearing ands a seven
tooth speedometer gear. Best of all it has a torque rating of 330ft/lbs
based on 100,000 mile usage. The stock T-5Z can handle up to 450 hp when
not drag raced.
I've been running a 'z-spec' in my Tiger for a couple years now. I changed
the OD to .73 and the car has a 3.54 posi, 245/50 tires (23.6" tall)and
about 400hp. I've had no problems at all with it and I've run it pretty hard
including autocross. I also use a Centerforce 'dual friction' clutch which I
really like...
Jim
B382000446
-----Original Message-----
From: tigers-bounces@autox.team.net [mailto:tigers-bounces@autox.team.net]
On Behalf Of rab65tiger@aol.com
Sent: August 25, 2010 11:04 AM
To: mark.rense@ge.com; tigers@autox.team.net
Subject: Re: [Tigers] Alternate Rear End Gears
-Original Message-----
I wonder what the torque rating of the Z spec T5, or some of the custom
built
race T5 are at a gross weight of about 3000lbs. versus I suspect 4000lbs
probably utilized in the factory calculations. I am not an engineer, but
the
torque rating has to be based on a gross load factor (gross weight of car
plus
some amount for passenger and contents), I would think the Tiger would have
a
gross load about 1000lbs. less than a fox mustang? Does any one have the
specifics on how transmission torque ratings are derived? If it were a
simple
direct linear comparison a 3000lb. versus 4000lb. would give the
transmission
a 25% higher torque capacity in a Tiger versus a mustang, or 330 to just
over
400 ft lbs. Is there any merit to my thought process?
Randy B
and the five speed T5s that fit inside the Tiger tunnel are not capable
of handling that level of torque unlike our faithful Toploader. Plus
with that amount of low end grunt the car will launch off the line hard
in pretty much any gear you choose.
Any thoughts?
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