[DeTomaso] Alignment for high speed

Ken Green kenn_green at yahoo.com
Sat Aug 15 10:20:39 EDT 2015 

Julian,
I think Johnny's mods are just to the top control arm, so all the pivot is about the lower ball joint.  
The good thing about offset control arm bushings is that the pivot is about the center.  I forget the exact numbers, but I thought that the offset bushings, plus machining the upper ball joint (which also results in pivot about the lower ball joint), seems to provide enough caster for most folks.
Ken
       From: Julian Kift <julian_kift at hotmail.com>
 To: cengles at cox.net; boyd411 at gmail.com 
Cc: detomaso at poca.com; teampantera at yahoo.com 
 Sent: Friday, August 14, 2015 9:57 PM
 Subject: Re: [DeTomaso] Alignment for high speed
   
  I believe the mod that Johnny does and which I also executed moves the
  balljoint 3/4 of an inch, providing about 7 degrees of caster; eleven
  is probably excessive IMO, especially ona narrow body car. I executed
  on my GT5 to try and reduce the tendency for tramlining of the 275 wide
  tires.
  I'm also intigued why Charles experienced tire rub in the fender upper
  front as the addition of positive caster rotates the wheel rearward
  over the center pivot point.
  Julian
  From: cengles at cox.net
  To: boyd411 at gmail.com
  Date: Thu, 13 Aug 2015 21:31:16 -0500
  Subject: Re: [DeTomaso] Alignment for high speed
  CC: detomaso at poca.com; teampantera at yahoo.com
Dear Boyd,





                Eleven degrees!  Impressive.  Do be aware of my sad experienc
e with five degrees of positive caster plus stock rolled fender lips plus nine i
nch wide by seventeen inch wheels with 245 mm wide tires----at full lock it tend
s to permit the tire to kiss the front upper outer fender lip.  Following that
is a notable blemish and a trip to the paint and body man for a repair to fix th
e damage and a recontouring of the fender flair to prevent future "kisses".
The advantages of big positive caster still outweigh these minor disadvantages.



                                    Positive Caster Ambassador,  Chuck Engles





From: Boyd Casey [mailto:boyd411 at gmail.com]
Sent: Thursday, August 13, 2015 7:39 PM
To: Charles Engles
Cc: mark skwarek; detomaso at poca.com; Mad Dog Antenucci
Subject: Re: [DeTomaso] Alignment for high speed



I sent my front upper A - arms and had them modified in a manner similar to pat
Micals. I used Johnny woods to do the work. His modification is supposed to obta
in around 11 degrees of caster.



Boyd



On Tue, Aug 11, 2015 at 10:56 AM, <cengles at cox.net> wrote:

  Dear Mark,

                "6.5 to 7 degrees of caster"......Well!  I certainly
  think that you've just about nailed that issue!  Not much more to add
  except the puny civilian alignment specs that I have may be of little
  use at the speeds you are looking at.

                              Warmest regards,  Chuck Engles



  On Tue, Aug 11, 2015 at 8:48 AM, mark skwarek wrote:

    I am using Delrin bushings and have 6.5 to 7 degrees of  castor.

  Mark

  On Tuesday, August 11, 2015 9:26 AM, "cengles at cox.net"
  <cengles at cox.net> wrote:

  Dear Mark,

                  Off the top of my head, the most positive caster that

  you can get is important.  I *think* it is paramount and the other

  parameters and secondary.    I have my alignments specs at home which I

  can send you this evening.

                            Warmest regards,  Chuck Engles

  On Mon, Aug 10, 2015 at 11:36 PM, mark skwarek via DeTomaso wrote:

  > Looking for alignment specs that work best for 145 to 165 mph
  driving.

  > Mark

  >

  >      ------------------------------

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-------------- next part --------------
   Julian,
   I think Johnny's mods are just to the top control arm, so all the pivot
   is about the lower ball joint.
   The good thing about offset control arm bushings is that the pivot is
   about the center.  I forget the exact numbers, but I thought that the
   offset bushings, plus machining the upper ball joint (which also
   results in pivot about the lower ball joint), seems to provide enough
   caster for most folks.
   Ken
     __________________________________________________________________

   From: Julian Kift <julian_kift at hotmail.com>
   To: cengles at cox.net; boyd411 at gmail.com
   Cc: detomaso at poca.com; teampantera at yahoo.com
   Sent: Friday, August 14, 2015 9:57 PM
   Subject: Re: [DeTomaso] Alignment for high speed
     I believe the mod that Johnny does and which I also executed moves
   the
     balljoint 3/4 of an inch, providing about 7 degrees of caster; eleven
     is probably excessive IMO, especially ona narrow body car. I executed
     on my GT5 to try and reduce the tendency for tramlining of the 275
   wide
     tires.
     I'm also intigued why Charles experienced tire rub in the fender
   upper
     front as the addition of positive caster rotates the wheel rearward
     over the center pivot point.
     Julian
     From: [1]cengles at cox.net
     To: [2]boyd411 at gmail.com
     Date: Thu, 13 Aug 2015 21:31:16 -0500
     Subject: Re: [DeTomaso] Alignment for high speed
     CC: [3]detomaso at poca.com; [4]teampantera at yahoo.com
   Dear Boyd,
                   Eleven degrees!  Impressive.  Do be aware of my sad
   experienc
   e with five degrees of positive caster plus stock rolled fender lips
   plus nine i
   nch wide by seventeen inch wheels with 245 mm wide tires----at full
   lock it tend
   s to permit the tire to kiss the front upper outer fender lip.
   Following that
   is a notable blemish and a trip to the paint and body man for a repair
   to fix th
   e damage and a recontouring of the fender flair to prevent future
   "kisses".
   The advantages of big positive caster still outweigh these minor
   disadvantages.
                                       Positive Caster Ambassador,  Chuck
   Engles
   From: Boyd Casey [mailto:[5]boyd411 at gmail.com]
   Sent: Thursday, August 13, 2015 7:39 PM
   To: Charles Engles
   Cc: mark skwarek; [6]detomaso at poca.com; Mad Dog Antenucci
   Subject: Re: [DeTomaso] Alignment for high speed
   I sent my front upper A - arms and had them modified in a manner
   similar to pat
   Micals. I used Johnny woods to do the work. His modification is
   supposed to obta
   in around 11 degrees of caster.
   Boyd
   On Tue, Aug 11, 2015 at 10:56 AM, <[7]cengles at cox.net> wrote:
     Dear Mark,
                   "6.5 to 7 degrees of caster"......Well!  I certainly
     think that you've just about nailed that issue!  Not much more to add
     except the puny civilian alignment specs that I have may be of little
     use at the speeds you are looking at.
                                 Warmest regards,  Chuck Engles
     On Tue, Aug 11, 2015 at 8:48 AM, mark skwarek wrote:
       I am using Delrin bushings and have 6.5 to 7 degrees of  castor.
     Mark
     On Tuesday, August 11, 2015 9:26 AM, "[8]cengles at cox.net"
     <[9]cengles at cox.net> wrote:
     Dear Mark,
                     Off the top of my head, the most positive caster that
     you can get is important.  I *think* it is paramount and the other
     parameters and secondary.    I have my alignments specs at home which
   I
     can send you this evening.
                               Warmest regards,  Chuck Engles
     On Mon, Aug 10, 2015 at 11:36 PM, mark skwarek via DeTomaso wrote:
     > Looking for alignment specs that work best for 145 to 165 mph
     driving.
     > Mark
     >
     >      ------------------------------
     >
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     > Detomaso Forum Managed by POCA
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