Suspension and Chassis Questions about your suspension? Need chassis advice?

Alignment Specs

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Old Jul 9, 2006 | 12:01 AM
  #1  
1991 RS/SS's Avatar
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From: Midwest
Car: 1991 Camaro RS
Engine: 383 LT1
Transmission: T56
Axle/Gears: 4.10
Alignment Specs

I know there are people that have spec sheets for alignment that produce better cornering than stock. Im hoping that somebody can help me out and provide me with some alignment specs. Im looking to carve corners as best as I can with what I have. Ill list my suspension mods below.

Tubular LCA's
Boxed Front A-arms
Boxed Torque Arm
Tubular adjustable panhard
LCA relocation brackets
Wonderbar and Subframe connectors
Full poly bushings
Eibach Pro-kit
Shocks/struts custom valved for Pro-Kit
Spohn Swaybars
Strut Tower Brace

Thanks in advance for any helpful input.
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Old Jul 10, 2006 | 05:21 PM
  #2  
blyth18md's Avatar
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From: Western Maryland
Car: 82z28
Engine: 406
Transmission: th350
Axle/Gears: 3.23
Caster

Max out

Camber:

-0.75

Toe:

total = 3/32

Last edited by blyth18md; Jul 10, 2006 at 06:20 PM.
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Old Jul 10, 2006 | 05:36 PM
  #3  
Dewey316's Avatar
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From: Portland, OR www.cascadecrew.org
Car: 1990 Camaro RS
Engine: Juiced 5.0 TBI - 300rwhp
Transmission: T5
Axle/Gears: 3.42 Eaton Posi, 10 Bolt
Originally Posted by blyth18md
Camber:

Max out

Caster:

-0.75

Toe:

total = 3/32
Those are about the worst specs I have ever seen. Please don't post garbage like that.


A good starting point, is usualy in the -1* to -1.5* camber (maybe more, this depends on how much front end roll you have), give the car a lot of caster (go for 5*-6*).

Now the front toe, can do some diffrent things, for a street car, with some spirited weekend driving, go for 1/32" - 1/16" toe in. If you plan to auto-x it (and don't do much normal driving) then a touch of toe-out, will help with initial turn in. Zeroing the toe can work well also, but it can also get a bit twitchy as speed increases.

Alignments take some playing around, and testing to really get right. And a lot of it depends on the roll charactor of the car, and driver prefrence.
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Old Jul 10, 2006 | 06:20 PM
  #4  
blyth18md's Avatar
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From: Western Maryland
Car: 82z28
Engine: 406
Transmission: th350
Axle/Gears: 3.23
EDIT....NOW I SEE WHAT I DID IT. Couldnt have just put it politely dewey? :-P


I wouldnt go as far as calling it garbage...

Maybe i should have elaborated on the caster continuing on an saying 5-6 degrees. But on my car it hit max at only 3.5*, next time I tear into the front suspension I'll study the strut towers and see how much material I have to grind out.

Perhaps the early cars didnt have provisions for as much caster as the later ones.

I'll agree with you some-what on camber as well though It truly depends on how street driven he intends to keep the car. I personally dont like to go over -.75 on camber for tire wear purposes. Yes If the car never saw the street or was a weekend only car Id consider going up to about -2*
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Old Jul 10, 2006 | 06:35 PM
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blyth18md's Avatar
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From: Western Maryland
Car: 82z28
Engine: 406
Transmission: th350
Axle/Gears: 3.23
.................Caster...............Camber..................Toe .Total
..................(deg)................(deg)......................(in)
...................L....R................L....R.......................
Street .........+4...+4.5........ -.5...-.5..................... 3/32
Hard Street...+5...+5.5........-1.....-1 ..................... 3/32
Drag Racing...+4...+4 ...........0......0...................... 1/32
Road racing...+6...+6.........-1.75...-1.75................
ShortCourse......................................................1/8out
Long Course......................................................1/16in


A table in the Camaro & Firebird Perforamnce Handbook for 3rd Generation cars lists the following recommendations. The figures are credited to Global West Suspension Components and are taken with driver weight included.
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Old Jul 11, 2006 | 12:58 AM
  #6  
1991 RS/SS's Avatar
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From: Midwest
Car: 1991 Camaro RS
Engine: 383 LT1
Transmission: T56
Axle/Gears: 4.10
Thanks for the help so far. I see that my adjustability is going to be limited with stock camber plates. Who makes adjustable ones? In the mean time do I just adjust it as close to the specs you guys are giving me as possible with the stock plates?
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Old Jul 11, 2006 | 11:28 PM
  #7  
Souseless's Avatar
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From: Buffalo, NY
Car: 89 WS6
Engine: 305 TPI
Transmission: T5
Axle/Gears: 10 bolt T2R w/ 3:23
I have Ground Control caster/camber plates and I can get a bunch of extra adjustment with them. stock height I had -2.5 camber and 6 cster. Lowered I have like -3.5 camber need to get rid of some of that.
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Old Jul 13, 2006 | 12:28 AM
  #8  
1991 RS/SS's Avatar
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From: Midwest
Car: 1991 Camaro RS
Engine: 383 LT1
Transmission: T56
Axle/Gears: 4.10
How much were those?
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Old Jul 13, 2006 | 09:28 PM
  #9  
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From: Buffalo, NY
Car: 89 WS6
Engine: 305 TPI
Transmission: T5
Axle/Gears: 10 bolt T2R w/ 3:23
weight jackers and springs were ~450.00 and the caster camber plates are 229.00. Delivery tends to take forever with them so keep that in mind. I am talking 10-12 weeks.
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Old Jul 13, 2006 | 09:35 PM
  #10  
Souseless's Avatar
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Joined: Jan 2004
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From: Buffalo, NY
Car: 89 WS6
Engine: 305 TPI
Transmission: T5
Axle/Gears: 10 bolt T2R w/ 3:23
Ground Control Suspension Systems
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Old Jul 20, 2006 | 06:46 PM
  #11  
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From: IA
Car: 1988 Camaro
Engine: 305ci TBI
Transmission: 700R4
Originally Posted by blyth18md
Maybe i should have elaborated on the caster continuing on an saying 5-6 degrees. But on my car it hit max at only 3.5*
If that's all the caster you could get then something is wrong with your car. The factory spec for caster is 4.8* +/- .5*.

If anyone is curious about the factory alignment specs:
Caster:....4.8* +/- .5*
Camber:...0.3* +/- .5*
Toe:........0.0* +/- .2*
..............0.0" +/- 3/32"
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Old Sep 5, 2006 | 01:56 PM
  #12  
blyth18md's Avatar
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Joined: Sep 2003
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From: Western Maryland
Car: 82z28
Engine: 406
Transmission: th350
Axle/Gears: 3.23
Originally Posted by di11avou
If that's all the caster you could get then something is wrong with your car. The factory spec for caster is 4.8* +/- .5*.

If anyone is curious about the factory alignment specs:
Caster:....4.8* +/- .5*
Camber:...0.3* +/- .5*
Toe:........0.0* +/- .2*
..............0.0" +/- 3/32"
Well factory specs are slightly different for the early cars , mines an 82 and doesnt have provisions for so much caster...I believe even the haynes manuals list the crummy specs...I was going to quote them but i cant remember where I put the damn thing.
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Old Sep 5, 2006 | 06:11 PM
  #13  
matt_p's Avatar
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From: Surrey, BC
Car: 1991 Z28
Engine: 305 TPI
Transmission: WC T5
Axle/Gears: 3.73 Posi
Haynes Manual says
1986 and earlier
Caster:....3.0
Camber:...1.00
Toe:........3/64

1987 to 1990
Caster:....4.7
Camber:...0.30
Toe:........0 inch

1991 to 1992
Caster:....4.8
Camber:...0.30
Toe:........0 inch
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Old Sep 6, 2006 | 09:46 PM
  #14  
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From: IA
Car: 1988 Camaro
Engine: 305ci TBI
Transmission: 700R4
Originally Posted by blyth18md
Well factory specs are slightly different for the early cars , mines an 82 and doesnt have provisions for so much caster...I believe even the haynes manuals list the crummy specs...I was going to quote them but i cant remember where I put the damn thing.
I stand corrected. My Hunter specs book only goes back to '87. I just assumed the earlier cars were the same.
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