06-07-2012, 08:14 PM | #1 |
WICKDSS
Drives: 2011 1SS/RS IOM LS3 Join Date: May 2010
Location: Wichita, Kansas
Posts: 1,111
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SS gets squirelly under WOT
Since the rear has been apart several times recently for the 9 inch conversion with an S trac posi (mechanical) I am trying to get my alignment dialed in again, Hopefully some of the alignment gurus can help me out here.
The SS has Spohn trailing arms and toe rods and BMR bushings on the spindle side of the trailing arm. Hotchkis chassis max brace on subframe and Hotchkis 1" lowering springs. The car is wiggling (not violently) very tightly back and forth side to side under hard acceleration (WOT all gears), most notably at the strip, but does this on the street too. It only became apparent after the 9 inch conversion and the much faster/aggressive acceleration now. The old numbers were Front Left Right Camber -.8 -1.0 Caster 5.9 5.8 Toe in .09 .11 Total Toe .20 Steer ahead -.01 Rear Camber -.3 -.4 Toe in .10 .09 Total Toe .18 Thrust angle 0.01 NEW current Numbers - Front Left Right Camber -.8 -1.1 Caster 5.8 5.9 Toe In .05 .05 Total Toe .10 Steer ahead 0.00 Rear Camber -.8 -.8 Toe In .07 .07 Total toe .14 Thrust angle 0.00 Can someone give me some advice for which direction I should go with the numbers? Since the new alignment the car did get better with less wiggling but it still has some movement. I am guessing it wants the rear toe and camber closer to 0? It did pretty well with the rear camber near -.3 or -.4 on the stock diff. I have checked all the subframe bolts and hotchkis attaching points. I am shooting for a happy medium between aggressive street and drag settings on street tires (Invos), I run the car on the drag strip several times a month but mostly street driving. Sorry for the long winded post. Thanks!
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2011 IOM SS/RS, M6. Look up our all generation Camaro club website at Heartland Camaros
Gforce Engineering Drivetrain, ECS 1500 Supercharger, TSP Cam, Alky Controls Meth single nozzle. 91 octane, 698 RWHP 625 rwtq. 4200#+, Tuned by Justin "Justune" Kalwei 11.57 @ 126.8 mph with a crappy 1.80 60'.....still learning to drive....M&H DR's and skinnies on 17" Welds. |
06-07-2012, 11:57 PM | #2 |
Drives: Exige, Miata, Ghia Join Date: Jun 2011
Location: CA, Bay Area
Posts: 2,309
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Is the car corner balanced? We had a guy here that was having this problem and he tried everything and nothing worked until he got it corner balanced.
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06-08-2012, 06:25 AM | #3 |
WICKDSS
Drives: 2011 1SS/RS IOM LS3 Join Date: May 2010
Location: Wichita, Kansas
Posts: 1,111
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It has not been corner balanced. What all is involved with doing that?
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2011 IOM SS/RS, M6. Look up our all generation Camaro club website at Heartland Camaros
Gforce Engineering Drivetrain, ECS 1500 Supercharger, TSP Cam, Alky Controls Meth single nozzle. 91 octane, 698 RWHP 625 rwtq. 4200#+, Tuned by Justin "Justune" Kalwei 11.57 @ 126.8 mph with a crappy 1.80 60'.....still learning to drive....M&H DR's and skinnies on 17" Welds. |
06-08-2012, 10:19 AM | #4 |
Drives: 2010 Camaro SS, 2014 Z28 Join Date: Jan 2012
Location: Houston
Posts: 414
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Corner balancing is a good idea after you've changed a lot of your suspension components and ride heights. Find a performance shop with the alignment and scales equipment. Not too dificult or expensive. Think of a table with one leg shorter than the other four. When you tilt the table on the short leg, it carries more weight than the other legs. When you tilt the table away from the shorter leg, the short leg carries little to no weight. This is an overly simple analogy, but you get the idea. It might not cure your problem, but is worth doing anyway.
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ERL 500 ci Short Block, 2in ARH Headers, TSP LS7 Heads, LSXR/NW 102, Forgeline, MGW Shifter, StopTech BBK, Pfadt C/O's, Pfadt ASB's, etc, PowerFab Dynotune
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06-08-2012, 01:42 PM | #5 | |
Drives: 2011 Camaro Join Date: Apr 2012
Location: Calabasas
Posts: 132
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Quote:
Some will do this with a full tank and you sitting in the car. |
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06-08-2012, 02:12 PM | #6 |
Drives: 2010 camaro 2SS LS3 Join Date: Aug 2011
Location: Denver
Posts: 1,334
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Does toe change when the rear suspension is under load?
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stage III cam, 4.10's, custom CAI, suede headliner
461 RWHP, 422 RWTQ |
06-08-2012, 02:19 PM | #7 |
WICKDSS
Drives: 2011 1SS/RS IOM LS3 Join Date: May 2010
Location: Wichita, Kansas
Posts: 1,111
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I'm not sure. Everything is poly bushed now, so deflection or movement should be minimal.
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2011 IOM SS/RS, M6. Look up our all generation Camaro club website at Heartland Camaros
Gforce Engineering Drivetrain, ECS 1500 Supercharger, TSP Cam, Alky Controls Meth single nozzle. 91 octane, 698 RWHP 625 rwtq. 4200#+, Tuned by Justin "Justune" Kalwei 11.57 @ 126.8 mph with a crappy 1.80 60'.....still learning to drive....M&H DR's and skinnies on 17" Welds. |
06-08-2012, 02:25 PM | #8 |
Drives: 2010, 2LT, RS, 6M, ABM (#1893) SOLD Join Date: Mar 2011
Location: Willits, CA
Posts: 1,437
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out of curiosity, what did you do with the old diff?
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06-08-2012, 02:39 PM | #9 |
Tampa Gulf Coast Family
Drives: 1977 Z28, 2SSRS 2010 M6 Join Date: Sep 2009
Location: Dunedin FL
Posts: 810
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After putting a cam in my car I had the same issue. I had it corner balanced and a new alignment done at the same time and straight as an arrow now. And my car is 3818 lbs with 3/4 of a tank and no driver.
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06-08-2012, 03:19 PM | #10 |
WICKDSS
Drives: 2011 1SS/RS IOM LS3 Join Date: May 2010
Location: Wichita, Kansas
Posts: 1,111
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__________________
2011 IOM SS/RS, M6. Look up our all generation Camaro club website at Heartland Camaros
Gforce Engineering Drivetrain, ECS 1500 Supercharger, TSP Cam, Alky Controls Meth single nozzle. 91 octane, 698 RWHP 625 rwtq. 4200#+, Tuned by Justin "Justune" Kalwei 11.57 @ 126.8 mph with a crappy 1.80 60'.....still learning to drive....M&H DR's and skinnies on 17" Welds. |
06-08-2012, 03:25 PM | #11 |
Drives: 2010, 2LT, RS, 6M, ABM (#1893) SOLD Join Date: Mar 2011
Location: Willits, CA
Posts: 1,437
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06-09-2012, 07:25 AM | #12 |
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You should contact Pete at Pedders, he provided me with three options for alignment (street, auto-cross, drag race) His e-mail contact is: PGB@PeddersUSA.com. As for corner balancing, you should definitely have it done and when it is done it should be with you or your weight equivalent in the drivers seat.
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06-09-2012, 07:35 AM | #13 |
Drives: 2010 Camaro SS, 2014 Z28 Join Date: Jan 2012
Location: Houston
Posts: 414
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Most performance shops will do a corner balance with 200 lbs in the driver's seat and approximately 1/2 tank of gas......unless you tell them otherwise. I've seen guys poor-boy it with inexpensive scales, but they have no way of knowing if the car is completely level.
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ERL 500 ci Short Block, 2in ARH Headers, TSP LS7 Heads, LSXR/NW 102, Forgeline, MGW Shifter, StopTech BBK, Pfadt C/O's, Pfadt ASB's, etc, PowerFab Dynotune
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06-12-2012, 06:57 PM | #14 |
WICKDSS
Drives: 2011 1SS/RS IOM LS3 Join Date: May 2010
Location: Wichita, Kansas
Posts: 1,111
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Any alignment gurus with input? I emailed a few but no responses.
__________________
2011 IOM SS/RS, M6. Look up our all generation Camaro club website at Heartland Camaros
Gforce Engineering Drivetrain, ECS 1500 Supercharger, TSP Cam, Alky Controls Meth single nozzle. 91 octane, 698 RWHP 625 rwtq. 4200#+, Tuned by Justin "Justune" Kalwei 11.57 @ 126.8 mph with a crappy 1.80 60'.....still learning to drive....M&H DR's and skinnies on 17" Welds. |
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