New Alignment Specs - Chevy Impala SS Forum
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post #1 of 15 (permalink) Old 04-21-2002, 09:19 AM
babyhauler
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Anyone know the alignment specs on 95 SS?
I had a local shop line it up after the front end rebuild & just wonder if their machine specs were correct. Are there regular specs or "improved" specs? Anything else I need to suggest. It's a stock weekend driver and monthly SOLO II car.
Thanks for your help
babyhauler
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post #2 of 15 (permalink) Old 04-21-2002, 09:45 AM
Terry McManmon
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The specs in their "machine" depend on the manufacturer of the machine. I use a Hunter. Note that Chevrolet does not even list rear camber and toe for our cars. Perhaps not a bad idea since they are not easily adjusted.
I have not been able to get columns to align on these posts, so you will have to use your imagination to see these in columns.

9C1 Wheel Alignment

Chevrolet Hunter internet
Left Camber 0.00 1.0 0 0.80 -0.25 0.25
Right Camber 0.00 1.0 0 0.80 -0.25 0.25
Cross Camber 0.00 1.5 1.0 0.25
Left Caster 3.25 1.0 3.5 1.0 4 .0.50
Right Caster 3.75 1.0 3.5 1.0 4 .0.50
Cross Caster 0.50 0.7 0.50
Individual Toe 0.08 0.1
Toe Total 0.16 0.2 0 0.2 0 0.06
Steering wheel angle 0.00 2.5
post #3 of 15 (permalink) Old 04-21-2002, 11:40 AM
bengston
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These are the accepted specs for the B-bodies.
http://b-body.net/Technical/Suspensi...mentSpecs.html

However, my car came with a different set of specs. When I switched to the above specs, the care handled with more understeer and a pronounced pull to the right anytime I was not on level pavement(almost all the time)

When I went back to the old specs it felt much better and had no right pull. It has a slight left pull on level pavement, but when do you run into that on the street?

My specs. This is on the sheet that came with the car. I don't think all are adjustable.

Question for the Gurus. Is it better for the tires to track straight, or have a technically "perfect" alignment that pulls?
 
post #4 of 15 (permalink) Old 04-21-2002, 03:24 PM
Terry McManmon
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The specs in the column marked internet in my post above are the ones from the B-body site posted above. Interestingly I just set my second car to the above specs and it pulls slightly to the right. The first car has no pull and tracks just fine.
post #5 of 15 (permalink) Old 04-21-2002, 09:03 PM
babyhauler
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Thanks
I'll find mine & post them if different.
babyhauler
post #6 of 15 (permalink) Old 04-23-2002, 04:37 PM
Occam
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From what I understand, there was a question about the "official" GM specs for Impala SS since the alignment numbers were the same ones given for the Caprice. I remember waaaay back on the original Impala SS LiSSt, someone posted revised specs that were supoosed to be an improvement over the factory numbers. The GM specs apparently didn't take into account the much wider wheels and tires on the SS. Maybe someone out there can pull those up? I'll snoop around on the net and see if I can find them and post them.
post #7 of 15 (permalink) Old 04-23-2002, 04:40 PM
Occam
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OOPs! Wayne already posted them. These are the specs I was talking about. You should take a close look at all the front end hardware and make sure nothing is worn out before you try these "improved" numbers.
post #8 of 15 (permalink) Old 04-23-2002, 05:47 PM
atlSS96
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The problem with the pull to the right does occur with the IGBA specs on some cars. I try to do 2 things when setting up the front of an Imp with the 50 or 45 series tires. Add a little toe, about 10deg, this helps the car track forward better, and stagger the caster about .5 favoring the right side. It is almost impossible to compensate for road crown, unless you have a center lane all the time but this helps. I also run about -.50 camber to take up a little for the ruts in heavily travelled roads, and it doesn't seem to have an ill affect on tire wear.
HTH, Scott
post #9 of 15 (permalink) Old 04-23-2002, 08:36 PM
Terry McManmon
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Sorry, In my case the car that pulls right is a 9c1 with 235 70x15 brand new Goodyear RS-As at 35 psi. Tried changing the wheel position, but it made no difference. Rotating the wheels by hand did not reveal any hanging brakes - I'm going to check the bearings next.
post #10 of 15 (permalink) Old 04-24-2002, 01:37 PM
bengston
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<BLOCKQUOTE>quote:</font><HR>and stagger the caster about .5 favoring the right side. <HR></BLOCKQUOTE>

It looks like that was done in my case. The guy who owned it before me, said a tech spent 1/2 a day working them out so that it would track straight. It does do that.
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