Steering arm length - Team Camaro Tech
Brakes, Suspension & Steering Conversion questions, Steering & Handling

 
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post #1 of 5 (permalink) Old Apr 9th, 08, 01:27 PM Thread Starter
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Joe
 
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Steering arm length

Doing the drum to disc on front conversion. 1968 Convertible......Dropped the control arms, and installed new bushings and ball joints, also installed new BB springs and working on installing power steering. My part numbers on the steering arms are 3917193 for lh and 3917194 for rh. Can anyone tell me if these are considered the long short or medium steering arms??? Dave Pozzi's site did not have these part numbers. I have done a search on here and read most of what I can find on these swaps. I realize I need a new rag joint (no problem, Advance Auto) and a longer pittman arm. anything else I may be missing???? And will the swap work no matter which length steering arm I use??? Thank you for your help. Joe
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post #2 of 5 (permalink) Old Apr 9th, 08, 03:17 PM
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Re: Steering arm length

First thing that comes to mind is the idler arm. It has to be the same lenght as the pitman arm or you'll have 'bump-steer' problems. Not sure of the rest of your stuff????

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post #3 of 5 (permalink) Old Apr 9th, 08, 07:07 PM Thread Starter
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Re: Steering arm length

I have not seen in any of the write ups that the idler arm must be changed too..........Thanks for giving me the heads up. Still waiting if anyone knows the answer to the steering arm question. Joe
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post #4 of 5 (permalink) Old Apr 9th, 08, 10:35 PM
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Re: Steering arm length

Code:
MAXIMUM TOE CHANGE IN INCHES
TEST 1 - Long idler/short pitman:
Passenger -  Driver       Passenger -  Driver
 31/2" susp. travel         2" susp. travel
  0.075      0.150          0.050      0.085

TEST 2  -  Long idler/long pitman:
   0.160    0.235          0.100      0.135

TEST 3  -  Short idler/long pitman:
   0.165    0.225          0.100      0.140

TEST 4  -  Short idler/short pitman:
   0.125    0.140          0.090      0.090

The sidebar says the best combination is the long idler arm 
and the short pitman, with the short pitman being the best 
regardless of which idler arm is used.  It also states that 
bumpsteer of more than 0.125" over 3" of suspension travel 
is considered excessive, and that the early Camaro exceeds 
this amount.
numbers on the left are for 3.5" travel, on the right is for 2" travel
Above shows how bumpsteer varies with different combos of Pitman and idler arms. Currently, only one idler arm is available and it's in-between the long and short.
David

Check my web page for First Gen Camaro suspension info: http://www.pozziracing.com
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post #5 of 5 (permalink) Old Apr 18th, 08, 04:20 PM
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David Pozzi
 
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Re: Steering arm length

Joe,
I do have those numbers on my page: LONG 6" manual, - LH-3902517 RH-3902518 (67, early long measured at 6") LH-3917193 RH-3917194 slow ratio manual steering.


They are the long arms. You can still use them, your resulting ratio will be a bit slower though.
David

Check my web page for First Gen Camaro suspension info: http://www.pozziracing.com
67 RS 327 original owner. 1965 Lola T-70
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