| Alignment question [message #163028] |
Thu, 15 March 2012 00:59  |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Late last fall I replaced the upper rear a-frame bushings with off set ones. I cranked them all the way in and then set the camber to 0 on both sides. I then check the caster on both sides and they were equal so I left it that way.
I finally took the GMC out of winter hibernation in my hanger and took it for a ride for the first time since I put the bushings in. I have a slight pull to the right. Not much but enough to be irritating.
I am assuming that I need to add a bit of camber to the right side to correct this. I'm thinking about 1/2 degree but my question is which way.
I am assuming that the top a-frame needs to com out a bit.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: Alignment question [message #163040 is a reply to message #163028] |
Thu, 15 March 2012 09:09  |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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You need to play with caster not camber is the way I understand it. Old school thinking would be to swap front tires first to see if it moves with the tires. I'm about to get into this whole thing on mine as soon as there os space in the garage using the new Work kit I have.
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: Alignment question [message #163045 is a reply to message #163035] |
Thu, 15 March 2012 10:13 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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| hasbeen wrote on Thu, 15 March 2012 07:10 |
Ken, back when I was doing alignments we always set the caster with the left side leading or a little ahead of the right side by about 3/4 degree to compensate for the crown of the road. Hope this helps. Jim
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Humm.....
What you are telling be is to leave the camber alone and reduce the caster on the right wheel. I can not increase the caster on the left wheel. It is already is at the maximum.
I need to drive a few more miles under different road conditions (left lane, 2 lane road, etc.) before I make any decision to change things.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] Alignment question [message #163049 is a reply to message #163028] |
Thu, 15 March 2012 10:29 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Ken, before you do too much tweeking on the alignment, be sure to verify
ride height, particularly the tire tread and air pressures, and toe in are
all correct. Tire pressures will really affect pull. Steve is right about O
degrees camber, with the same caster side to side. If you have all steel
tires, you might favor the ditch side a 1/2 degree or so. JWIK.
Jim Hupy
Salem, OR
78 GMC Royale 403
On Wed, Mar 14, 2012 at 10:59 PM, Ken Burton <n9cv@comcast.net> wrote:
>
>
> Late last fall I replaced the upper rear a-frame bushings with off set
> ones. I cranked them all the way in and then set the camber to 0 on both
> sides. I then check the caster on both sides and they were equal so I left
> it that way.
>
> I finally took the GMC out of winter hibernation in my hanger and took it
> for a ride for the first time since I put the bushings in. I have a slight
> pull to the right. Not much but enough to be irritating.
>
> I am assuming that I need to add a bit of camber to the right side to
> correct this. I'm thinking about 1/2 degree but my question is which way.
>
> I am assuming that the top a-frame needs to com out a bit.
> --
> Ken Burton - N9KB
> 76 Palm Beach
> Hebron, Indiana
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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| Re: [GMCnet] Alignment question [message #163053 is a reply to message #163046] |
Thu, 15 March 2012 10:51 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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| Steven Ferguson wrote on Thu, 15 March 2012 10:10 |
Play with one, you'll have to play with the other. Easiest way is to shoot for as much caster as possible and still get zero deg camber.
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That is what I have now. Maximum EQUAL caster side to side and 0 camber on both sides. I was just looking for what to tweek a bit. This is just a slight pull that was not there before I started. I'll drive it some more on 4 lane and 2 lane roads before I make any adjustments.
I just wanted to know what to change if necessary.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: Alignment question [message #163062 is a reply to message #163040] |
Thu, 15 March 2012 12:09 |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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| JohnL455 wrote on Thu, 15 March 2012 08:09 |
You need to play with caster not camber is the way I understand it. Old school thinking would be to swap front tires first to see if it moves with the tires. I'm about to get into this whole thing on mine as soon as there os space in the garage using the new Work kit I have.
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I'm with John--I think it is still appropriate thses days. Even though the tires may not have been switched when you did the alignment, you may be surprised that it may affect the situation after the alignment.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: [GMCnet] Alignment question [message #163069 is a reply to message #163040] |
Thu, 15 March 2012 12:55 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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John,
Are you coming to Shawnee? If so, can you bring your Work kit? I'm
to give a presentation (more like a round table, I expect) on wheel
alignment. I'll be referring to Jerry's equipment and procedure; it
would be nice to show it -- and perhaps lend it out, as I will my own.
Ken H.
On Thu, Mar 15, 2012 at 10:09 AM, John R. Lebetski wrote:
>
>
> You need to play with caster not camber is the way I understand it. Old school thinking would be to swap front tires first to see if it moves with the tires. I'm about to get into this whole thing on mine as soon as there os space in the garage using the new Work kit I have.
> --
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Alignment question [message #163073 is a reply to message #163069] |
Thu, 15 March 2012 13:12 |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
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Do you have a date planned for the 'round table' Ken?
Thanks,
Sully
77 Royale
On Thu, Mar 15, 2012 at 10:55 AM, Ken Henderson <hend4800@bellsouth.net>wrote:
> John,
>
> Are you coming to Shawnee? If so, can you bring your Work kit? I'm
> to give a presentation (more like a round table, I expect) on wheel
> alignment. I'll be referring to Jerry's equipment and procedure; it
> would be nice to show it -- and perhaps lend it out, as I will my own.
>
> Ken H.
>
>
> On Thu, Mar 15, 2012 at 10:09 AM, John R. Lebetski wrote:
> >
> >
> > You need to play with caster not camber is the way I understand it. Old
> school thinking would be to swap front tires first to see if it moves with
> the tires. I'm about to get into this whole thing on mine as soon as there
> os space in the garage using the new Work kit I have.
> > --
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
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Sully
77 Royale basket case.
Future motorhome land speed record holder(bucket list)
Seattle, Wa.
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| Re: Alignment question [message #163100 is a reply to message #163028] |
Thu, 15 March 2012 19:25 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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Senior Member |
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I had hoped to come to the spring ralley and could bring the kit, but it looks doubtful now. Sadly.
John Lebetski
Woodstock, IL
77 Eleganza II
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