Modified Adjustment Guide

Problem/Adjustment

 Tight on Entry Loose on Entry Tight in Middle Loose in Middle Tight on Exit Loose on Exit
LF Spring Soften Stiffen
-
-
-
-
RF Spring Stiffen Soften
-
-
 Soften Stiffen
LR Spring Stiffen Soften
-
-
 Soften Stiffen
RR Spring Soften Stiffen
-
-
 Stiffen Soften
LF Shock Less Comp. More Comp. More Rebound Less Rebound More Rebound Less Rebound
RF Shock More Comp. Less Comp. More Comp. Less Comp. More Rebound. Less Rebound.
LR Shock More Rebound. Less Rebound More Rebound Less Rebound More Comp. Less Comp.
RR Shock More Comp. Less Comp. More Comp. More Rebound More Comp. Less Comp.
Panhard Bar@Pinion Raise Lower Raise Lower
-
-
Panhard Bar@Frame Lower Raise Lower Raise
-
-
LR Top Rod-Frame
-
-
 Lower Raise Lower Raise
LR Top Rod-B/C
-
-
-
-
 Raise Lower
LR Bottom Rod Raise Lower
-
-
 Raise Lower
RR Top Rod Lower Raise
-
-
 Raise Lower
RR Bottom Rod Raise Lower
-
-
 Raise Lower
Ballast Height Lower Raise Lower Raise Lower Raise
Left Side % Increase Decrease Increase Decrease Decrease Increase
Rear % Decrease Increase Increase Decrease Decrease Increase
Cross Weight/Wedge Increase Decrease Decrease Increase Decrease Increase

Trail RR

Wheelbase

Lengthen RightSide

 Shorten RightSide Lengthen RightSide Shorten RightSide Lengthen RightSide Shorten RightSide
Wrap Up Shock Lower@Frame Raise@Frame
-
-
-
-
Air Pressure

Increase RR

Decrease RR
Increase RR
Decrease RR
Increase RR
Decrease RR

Notes:

1. Keep in mind when making an adjustment that almost any change is a compromise.

2. Make changes in one area at a time to understand the results.

 

 

MODIFIED CHASSIS BASELINE (DIRT) FOR 2008-2013 CARS

RIDE HEIGHTS (CHEVELLE FRONT CLIP)

RIGHT FRONT: 6.00"

LEFT FRONT: 6.00"

REAR: 6.50"

SPRINGS

LF:550# RF:600#

LR:200# RR:175#

BITE

LEFT SIDE: 52.5%

REAR: 56%

CROSS: 49-50%

BASED ON 20 GALLONS OF FUEL AND NO DRIVER

TORQUE ROD/PULL BAR

-SET AT 15 DEGREES

-SET PINION ANGLE AT 7 DEGREES

REAR END LOCATION

-CENTERED ON CHASSIS ALIGNMENT MARKS

-60" HOUSING WIDTH

FRONT END ALIGNMENT

CASTER:

LF:+2

RF:+4

TOE: 1/4 TO 3/8 OUT

CAMBER:

LF:+2

RF:-3.5

4-BAR SUSPENSION

LEFT LOWER: 6 DEGREES UP

LEFT TOP: 20 DEGREES UP

RIGHT LOWER: LEVEL

RIGHT TOP: 17 DEGREES UP

4-BAR LENGTHS

BOTTOM: 14" CENTER TO CENTER

TOP: 16" CENTER TO CENTER

WHEEL OFF-SETS

LF: 3" RF: 3"

LR: 3" RR: 3"

(INCREASE RR TO 4" OFF-SET ON EXTREMELY SMOOTH AND/OR DRY-SLICK TRACKS)

TIRE PRESSURES

LF: 8# RF: 14#

LR: 8# RR: 10-12#