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<DIV><FONT face=Calibri>same people, that doesn't want to drive a bone stock
standard Pantera.</FONT></DIV>
<DIV style="FONT: 10pt Tahoma">
<DIV><BR></DIV>
<DIV style="BACKGROUND: #f5f5f5">
<DIV style="font-color: black"><B>From:</B> <A title=mikael_hass@mail.tele.dk
href="mailto:mikael_hass@mail.tele.dk">Mikael</A> </DIV>
<DIV><B>Sent:</B> Thursday, December 19, 2013 9:10 PM</DIV>
<DIV><B>To:</B> <A title=MikeLDrew@aol.com
href="mailto:MikeLDrew@aol.com">MikeLDrew@aol.com</A> ; <A
title="mailto:timepiecepr2@yahoo.com
STRG + Klicken, um Verknüpfung zu folgen"
href="mailto:timepiecepr2@yahoo.com">timepiecepr2@yahoo.com</A> ; <A
title="mailto:thomas@hax.se
STRG + Klicken, um Verknüpfung zu folgen"
href="mailto:thomas@hax.se">thomas@hax.se</A> </DIV>
<DIV><B>Cc:</B> <A title=detomaso@poca.com
href="mailto:detomaso@poca.com">detomaso@poca.com</A> ; <A
title="mailto:jderyke@aol.com
STRG + Klicken, um Verknüpfung zu folgen"
href="mailto:jderyke@aol.com">jderyke@aol.com</A> </DIV>
<DIV><B>Subject:</B> Re: [DeTomaso] Pantera Si</DIV></DIV></DIV>
<DIV><BR></DIV>
<DIV class=WordSection1>
<P class=MsoNormal><SPAN lang=EN-US
style="FONT-FAMILY: 'Arial','sans-serif'; COLOR: blue">”</SPAN><SPAN lang=EN-US
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Geneva','serif'; COLOR: black"> that it
just drives beautifully, like a completely modern car compared to a standard
Pantera</SPAN><SPAN lang=EN-US
style="FONT-FAMILY: 'Arial','sans-serif'; COLOR: blue">”, who wants that?!
</SPAN><SPAN lang=EN-US
style="FONT-FAMILY: Wingdings; COLOR: blue">J</SPAN><SPAN lang=EN-US
style="FONT-FAMILY: 'Arial','sans-serif'; COLOR: blue"><o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US
style="FONT-FAMILY: 'Arial','sans-serif'; COLOR: blue"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US
style="FONT-FAMILY: 'Arial','sans-serif'; COLOR: blue">Mvh/Regards<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US
style="FONT-FAMILY: 'Arial','sans-serif'; COLOR: blue">Mikael<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN lang=EN-US
style="FONT-FAMILY: 'Arial','sans-serif'; COLOR: blue">Hass Consult
ApS<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 8pt; FONT-FAMILY: 'Arial','sans-serif'; COLOR: blue">+45
31770747<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 8pt; FONT-FAMILY: 'Arial','sans-serif'; COLOR: blue"><A
href="mailto:mikael_hass@mail.tele.dk">mikael_hass@mail.tele.dk</A><o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Arial','sans-serif'; COLOR: blue"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'">Fra:</SPAN></B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'"> <A
href="mailto:MikeLDrew@aol.com">MikeLDrew@aol.com</A> [mailto:MikeLDrew@aol.com]
<BR><B>Sendt:</B> 19. december 2013 19:37<BR><B>Til:</B> <A
href="mailto:timepiecepr2@yahoo.com">timepiecepr2@yahoo.com</A>; <A
href="mailto:thomas@hax.se">thomas@hax.se</A><BR><B>Cc:</B> <A
href="mailto:detomaso@poca.com">detomaso@poca.com</A>; <A
href="mailto:jderyke@aol.com">jderyke@aol.com</A><BR><B>Emne:</B> Re: [DeTomaso]
Pantera Si<o:p></o:p></SPAN></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Geneva','serif'; COLOR: black"><BR>In a
message dated 12/19/13 8 38 2, <A
href="mailto:timepiecepr2@yahoo.com">timepiecepr2@yahoo.com</A>
writes:<BR><BR><BR><BR><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN-BOTTOM: 12pt"><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Geneva','serif'; COLOR: black"><BR>Can you
summarize the upgrades that made the car so much more modern and civilized. I am
just curious.<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Geneva','serif'; COLOR: black"><BR>>>>The
entire suspension system was redesigned in keeping with modern practice.
The standard Pantera was state-of-the-art at the time, but then again, a horse
and buggy was state of the art in ITS time too. The early Pantera uses
control arms that are extremely short by modern standards, and wheels with a
negative offset (and in the case of the GT5, an extremely negative
offset). This means that for a given amount of wheel travel in the
vertical plane, there is a relatively large amount of angular change in the
suspension arm.<BR><BR>Consider a standard 12-inch ruler. Hold it
horizontally, then move one end of it up and down six inches. Now consider
a 36-inch yardstick. If you do the same thing, six inches of vertical
movement at one end results in much less angular difference.<BR><BR>The same
holds true with auto suspension design. The Pantera Si uses control arms
that are substantially longer, which spaces the hubs much further away from the
centerline of the car. If you bolted standard Pantera wheels on, the tires
would stick out about a week. So instead, it has wheels with fairly
pronounced positive offset--the vertical surface of the wheel is relatively flat
(particularly in front) and the rim extends inwards and envelops the
hubs/brakes.<BR><BR>If you look at a normal Pantera suspension and compare the
kingpin centerline (the imaginary line between the upper and lower ball joint,
where the steering spindle rotates) and the centerline of the tire contact
patch, where both touch the ground, you'll see that there is a pronounced
difference, with the contact patch centerline being several inches outboard of
the kingpin centerline. The difference between where these two lines touch
the ground is called the scrub radius. The Pantera has a fairly large
scrub radius, which raises steering effort and magnifies road shock, as an
impact to one wheel has a leverage effect. That's why when you hit a bump
with your right tire, for instance, the steering wheel tugs to the right and you
have to correct it.<BR><BR>(Replacing the stock 7-inch front wheels with 8-inch
wheels helps correct this, as doing so reduces the scrub radius a half inch
because the extra wheel width is all inboard of the wheel
centerline).<BR><BR>The Pantera Si with its longer A-arms has much less scrub
radius, so the suspension is much more immune to unwanted feedback transmitted
by bumps. I don't know for a fact, but I suspect the steering axis
inclination (SAI) figures are better as well. SAI is the angle between the
kingpin line and the imaginary vertical line of the center of the contact
patch. Angling the SAI inwards causes the spindle to rise and fall as the
wheels are turned one direction or the other, which in turn raises the
suspension slightly. This causes the suspension to attempt to seek its low
(center) position naturally, which allows the design to rely less on positive
caster to keep directional stability. Positive caster delivers stability
at the expense of higher steering effort; achieving stability through more SAI
and less caster allows the same stability with less steering effort.<BR><BR>What
this all means from behind the wheel of the Pantera Si is that it just drives
beautifully, like a completely modern car compared to a standard Pantera.
Driving a regular Pantera on a bumpy road requires a degree of concentration,
because even with the bump steer optimized by shimming the rack downwards (which
De Tomaso/Ford did starting in late '72-early '73), the bump steer curve is
still there, and the scrub radius means the steering wheel is tugging at your
hands constantly. By contrast, a Pantera Si just glides across those same
road imperfections, with the suspension moving up and down to absorb bumps, and
delivering only wanted feedback through to the wheel. Steering effort is
probably about the same as a regular Pantera, or perhaps a bit
less.<BR><BR>Another terrific Si improvement is the brakes. It wears the
same Brembo brakes as the Ferrari F40, and they are simply leagues ahead of the
stock Pantera brakes, or even most aftermarket systems that I've tried, in terms
of power and feedback. There is NO power assist (no brake booster at all),
yet due to changed brake pedal geometry, pedal effort is about the same as with
a normal Pantera, but ultimate power and feedback and control are much
greater. The pedal feels nice and firm, very mechanical.<BR><BR>The cabin
is beautifully trimmed, and things like wind noise are controlled a bit better
as well. Overall the car is much quieter going down the road, due in no
small part to the engine which is as weak as a kitten, and the EU-compliant
exhaust system which mutes it even further.<BR><BR>Most of us know the feeling
after driving a Pantera for many hours at a stretch. You get out of the
car and you are pretty tired. I'm confident the same would not be true
after making that same drive in a Pantera Si.<BR><BR>FWIW I've heard that Pat
Mical has developed a bolt-on suspension package that does away with all the
stock control arms, hubs and spindles and emulates the Si design; it necessarily
requires new wheels as well. Obviously that is not a conversion for the
faint of wallet, but I imagine it would improve the car's handling and driving
characteristics immensely. I don't know if any cars have been modified
other than the single example that he did for himself when he converted a stock
Pantera into an Si clone, which is a MUCH larger undertaking than you would
imagine!<BR><BR>Mike</SPAN><SPAN
style="FONT-FAMILY: 'Arial','sans-serif'"><o:p></o:p></SPAN></P></DIV>
<P>
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