[DeTomaso] Pantera Steering

[MikeLDrew at aol.com]

In a message dated 2/23/14 11 00 40, SOBill at aol.com writes:


> The only true cure for this problem is to reduce the Pantera scrub 
> radius 
> by moving the tire contact patch inboard with respect to the steering 
> axis. 
> Unfortunately, there is no simple way to do this. Installing wheels with 
> greater inboard offset (which must still clear the brake mechanism) will 
> move
> the tire contact patch inboard. The stock Pantera chassis is already  very
> close to the inboard edge of the tire at full steering lock. Moving the 
> tire inboard a couple of inches will cause the tires to  rub before full
> steering lock and will look peculiar with the tires  recessed into the 
> fender
> wells.
> 

>>>This assumes that the wheel width remains constant, and the offset is 
the only thing that changes.   But as you suggested, fitting a wider wheel (8 
inch versus 7) with the additional width taking place on the inside only, 
does have a measurable improvement.   Most (all?) Pantera vendor-sourced 
Campagnolo clones feature 16, 17 or 18x8 front wheels.

Julian's car is a GT5, which has a much, much bigger problem than our early 
cars.   Those cars have front wheels that are 15x10, and all the additional 
width is to the outside.   The scrub radius of those things is just 
unbelievable.

FWIW Pantera East's GT5 wheels in 17-inch are 17x11, with the additional 
inch inboard, in an attempt to address the problem.

Mike (happy with my stock-body Pantera with 15x8 Campagnolo wheels on the 
front....)
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   In a message dated 2/23/14 11 00 40, SOBill at aol.com writes:

     The only true cure for this problem is to reduce the Pantera scrub
     radius
     by moving the tire contact patch inboard with respect to the
     steering axis.
     Unfortunately, there is no simple way to do this. Installing wheels
     with
     greater inboard offset (which must still clear the brake mechanism)
     will move
     the tire contact patch inboard. The stock Pantera chassis is
     already  very
     close to the inboard edge of the tire at full steering lock. Moving
     the
     tire inboard a couple of inches will cause the tires to  rub before
     full
     steering lock and will look peculiar with the tires  recessed into
     the fender
     wells.

   >>>This assumes that the wheel width remains constant, and the offset
   is the only thing that changes.  But as you suggested, fitting a wider
   wheel (8 inch versus 7) with the additional width taking place on the
   inside only, does have a measurable improvement.  Most (all?) Pantera
   vendor-sourced Campagnolo clones feature 16, 17 or 18x8 front wheels.
   Julian's car is a GT5, which has a much, much bigger problem than our
   early cars.  Those cars have front wheels that are 15x10, and all the
   additional width is to the outside.  The scrub radius of those things
   is just unbelievable.
   FWIW Pantera East's GT5 wheels in 17-inch are 17x11, with the
   additional inch inboard, in an attempt to address the problem.
   Mike (happy with my stock-body Pantera with 15x8 Campagnolo wheels on
   the front....)