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Board Moderator & Exner Expert 10K+
Posts: 13050
   
Location: Southern Sweden - Sturkö island | Hi guys, I'm thankful for your experience about front alignment and compensation for radia tires - see the spec's and give me some suggestions for eventual modifications of caster and/or camber values
Oh, for 1960 Chrysler that is...
Edited by wizard 2013-05-25 2:24 PM
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Expert
Posts: 3575
Location: Netherlands | The general advice for radial tires and better steering and handling is as follows;
Go for as much positive caster as you can, upto 5 degrees. Use a 1/4° to 1/2° negative camber.
With the 'limited' caster-adjustability in a Chrysler frontsuspension, you probably won't be able to get more than 2-3° caster perhaps, which is good enough.
Toe-in is 1/8".
Edited by BigBlockMopar 2013-05-25 5:42 PM
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Expert
Posts: 3575
Location: Netherlands | Here's a good article about modern day alignments on Mopars;
http://www.allpar.com/history/mopar/front-end-alignment.html
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Exner Expert 19,174 posts. Neil passed away 18 Sep 2015. You will be missed, Neil!
Posts: 19146
Location: bishop, ca | I understand that the limit of positive caster, on the 57+ Mopes is about 1.5 degrees; after that point, the camber starts to
change, adversely.
BTW: 1.5 degrees of positive caster is PLENTY; been there, got 'that' on Horrie.
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Board Moderator & Exner Expert 10K+
Posts: 13050
Location: Southern Sweden - Sturkö island | Thanks' for your input guys! The aim would be 2-3° caster and the compromise 1,5° and 1/4° to 1/2° negative camber. |
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Expert
Posts: 3399
Location: Chestertown, NY ( near Lake George) | You will not get 2 plus degrees caster without compromising the camber and 1.5 as stated will do it, camber and toe in can stay withing oe specs. However on kingpin cars you cannot get to positve caster period. Shims must be installed in the upper and lower arms. If needed I can give you the details. |
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Expert 5K+
Posts: 5139
Location: cornpatch county, Southwest IOA | Shep - 2013-05-26 11:25 AM
You will not get 2 plus degrees caster without compromising the camber and 1.5 as stated will do it, camber and toe in can stay withing oe specs. However on kingpin cars you cannot get to positve caster period. Shims must be installed in the upper and lower arms. If needed I can give you the details. Shep, quite some time ago , I found some positive caster shims for 55-56 Chrysler. But I don't know where they go and how to install them. Do you have any pics or info?............................MO |
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Expert 5K+
Posts: 7402
Location: northern germany | i stopped wasting money at alignment shops 20 years ago. my car is lowered and i try to get as much caster as possible. i adjust toe-in according to the shop manual with a homemade tool and camber until it looks right. sounds stupid but it works for me. i have a homemade tool for camber adjustment but i never use it. my car goes down the road straight as an arrow at 150+ mph.
Edited by 1960fury 2013-05-30 6:49 PM
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Expert
Posts: 3399
Location: Chestertown, NY ( near Lake George) | Ok, the shims to increase the caster if they are the double notched type are installed as follows. Under the rear lower control arm bracket and bolts between the bracket and crossmember effectively tilting the arm downward at the rear. then on the upper control arm do the same under the front attaching points on both control arms effectively tipping the front of the arm up, this will increase caster, how many shims? Well you will need pre- alignment readings first then post back, usually they will be about 1 degree negative. What thickness shims are these and are they marked as they are aftermarket stuff.
Edited by Shep 2013-05-31 9:18 AM
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Elite Veteran
Posts: 982
Location: Upper Hunter NSW Australia | 1960fury - 2013-05-31 9:47 AM
i stopped wasting money at alignment shops 20 years ago. my car is lowered and i try to get as much caster as possible. i adjust toe-in according to the shop manual with a homemade tool and camber until it looks right. sounds stupid but it works for me. i have a homemade tool for camber adjustment but i never use it. my car goes down the road straight as an arrow at 150+ mph.
......
^ Nothing stupid there, same with me, for years now on my older cars I do my own wheel alignments at home on my workshop floor by eye , sometimes with a modified spirit level , for toe in I do it with a tape measure and chalk marks on the tires.
Occasionally it takes a few goes at it but I've never had scrub/wear issues on any of them so far and I've done quite a few of my own and friends older cars as well. Most alignment shops here now won't do these older cars usually because the guy doing it was trained on modern stuff and doesn't know how to do earlier cars.
.....
On another note....
I see the steering axis inclination on the spec sheet has quite a bit of variance in it's 5 1/2 to 7 1/2 inclination, I guess they mean in car variance , not actual axle in hand variance ?
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Expert
Posts: 3399
Location: Chestertown, NY ( near Lake George) | Using turn plates and a magnetic head make doing caster at home the way to go, When setting caster you turn the wheels out 20 degrees read the gage,zero and turn in 20 degrees level the gage and you have caster,on the ground tread flex makes this inaccurate. |
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Board Moderator & Exner Expert 10K+
Posts: 13050
Location: Southern Sweden - Sturkö island | BigBlockMopar - 2013-05-25 11:37 PM
The general advice for radial tires and better steering and handling is as follows;
Go for as much positive caster as you can, up to 5 degrees. Use a 1/4° to 1/2° negative camber.
With the 'limited' caster-adjustability in a Chrysler front suspension, you probably won't be able to get more than 2-3° caster perhaps, which is good enough.
Toe-in is 1/8".
Just a final question; the same value for both sides? the old specs have some differences between left and right side. |
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Expert
Posts: 3575
Location: Netherlands | Good catch. There is some difference in camber for road-crown compensation.
That's usually the (I believe) 1/2 or 1/4 degree difference you will in camber-specs.
You will have to check to make sure which side has the 'more' camber, but I believe it was the pass.side.
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Expert
Posts: 2119
Location: atlanta | I was on the Rockauto site, swear I saw those optional adjusters with 5 degrees of adjustment. |
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Front alignment - compensation for radials
