| Installation Instructions |
| |
PLEASE READ THESE INSTRUCTIONS THOROUGHLY BEFORE
BEGINNING INSTALLATION |
The installation of CPP's Independent front suspension
unit may appear complicated, but it is really very simple. Because CPP has
engineered all the correct angles and geometry into the crossmember itself,
all that's required are a few careful measurements to locate the crossmember
correctly on your chassis before welding it into position. If you are installing
the IFS unit onto a stock frame, there is some work involved in preparing
the frame for the installation, but the remainder of the job can be accomplished
with everyday hand tools. We recommend that all welding be performed by
a qualified welder. We also recommend that you have the alignment checked
at a front end shop when you are finished.
The installation procedure is the same for all '28 thru
'34 chassis, but the location measurements differ. Please be sure to use
the correct dimensions from the diagram for your particular car shown below. |
| |
|
| 1. |
PREPARING THE STOCK FRAME |
|
· Remove all of the old steering and suspension components. |
|
· Tack weld two braces to the top and bottom of the
frame rails behind the original crossmember to insure that frame rails do
not move. |
|
· Remove original crossmember by drilling out the rivets. |
|
· Box the frame rails and weld up the rivet holes left
by the original crossmember. |
|
· Finish grind all welds. |
| 2. |
INSTALLING THE IFS CROSSMEMBER & RADIATOR TABS |
|
· Mark stock axle centerline on the frame rails as
per diagram at right that applies to your chassis. |
|
· Fit IFS crossmember squarely on rails, top and bottom,
with the centerline of the crossmember located 1/4" forward of the
stock axle centerline. |
|
· Tack weld IFS crossmember to boxed frame rails. |
|
· Recheck all measurements. (Check measurements diagonally
to check for squareness) |
|
· Weld crossmember to rails on all sides. |
|
· Weld radiator tabs in position as per diagrams. |
| 3. |
INDEPENDENT SUSPENSION ASSEMBLY |
|
· Install Lower Control Arms onto crossmember. The
lower arms are identical, so there is not a left or right. |
|
· Install the Upper Control Arms with the Eccentric
onto the crossmember. The upper arms are marked right and left as they are
different. |
|
· Install the Spindle, Brake Rotor assembly (assembly
comes with bearings packed and seals installed) to the ball joints with
the caliper brackets and steering arms facing the rear. |
|
· Install the Rack & Pinion steering gear. |
|
· Install the Coil-over Shocks. |
| 4. |
SETTING RIDE HEIGHT |
|
· With full car weight on suspension, Lower Control
Arm pivot should be 1/2" to 1 " lower than the center of the Ball
joint sleeve. To adjust, jack up the car to remove the weight and then turn
the lower rings on the Coil-overs. The Lower Control Arms will angle slightly
uphill towards the wheels when properly set. |
| 5. |
SETTING CAMBER |
|
· Loosen set screw locks on Eccentric housing. |
|
· Rotate Eccentric by inserting the provided tool or
an equivalent 114" diameter object (phillips screwdriver) into the
hole on the side of the Eccentric. Rotating Eccentric is easier with car
jacked up, but Camber must be checked at ride height. |
|
· Camber should beset at 1/4" Positive. |
| 6. |
SETTING CASTER |
|
· With set screw locks still loose, Caster is set by
sliding Eccentric slightly fore or aft within it's housing. Gentle tapping
with a soft hammer may be required. |
|
· Set Caster between l" and 1-1/2" Positive,
making sure that both left and right sides are set the same. |
|
· Tighten set screws to lock in Caster and Camber settings. |
| 7. |
SETTING TOE-IN |
|
· Set Toe-in by adjusting the tie rod ends on the Rack
& Pinion steering gear. |
|
· Toe-in should be set at 1/32" for radial tires
and 1/16" to 1/8 " for bias-ply tires. |
