Ridetech 11013509 User Manual

350 S. St. Charles St. Jasper, In. 47546

Ph. 812.482.2932 Fax [phone]

www.ridetech.com

Part # 11013509

55-57 Chevy RQ Series Front CoilOvers

For Use w/ StrongArms

Shock Assembly:

2 24049999 4.1” stroke RQ Series shock

2 90009986 2” non adjustable threaded stud top

2 90001994 .625” I.D. bearing

4 90001995 Bearing snap ring

Components:

2 59100600 Coil spring – 10” long / 600 # rate

2 90002312 2” stud top base

2 90002222 Spring retainer kit (do not use standard upper spring retainer)

2 90002070 ¾” drop upper spring retainer

2 90001902 Aluminum cap for Delrin ball

2 90001903 Delrin ball upper half

2 90001904 Delrin ball lower half

4 70010828 Delrin Spring Washers

Hardware:

2 99562003 9/16” SAE Nylok jam nut Stud top hardware

1. Impact Forged, Monotube shock

2. Rebound adjustment knob (SA Only)

3. Upper coil spring retainer (Use ¾”
dropped cap)

4. Lower coil spring retainer

5. High tensile coil spring

6. Set screw

7. Delrin Spring Washers

1. Stud top base

2. Lower Delrin ball half

3. Upper Delrin ball half

4. Aluminum cap

5. 9/16” Nylok jam nut

6. Threaded stud

7. Adjustment knob (SA Only)

8. Screw (SA Only)

9. Snap ring

1. To allow the step in the lower
Delrin ball half to slide into the
factory shock hole, the bushing cup
will need to be removed and the hole
may need to be drilled out to ¾”.

2. Assemble the CoilOver then place
into the coil spring pocket w/ the stud
and lower Delrin ball sticking through
the factory shock hole.

3. Check clearance between the
upper factory spring retaining lip and
stud top base. Allowing this to hit
could cause the shock to break, this

4. Place the upper Delrin ball over
stud, then the aluminum cap. Secure
the assembly w/ the 9/16” Nylok jam
nut.

5. Attach the bottom of the shock to
the lower StrongArms using the
spacers and hardware supplied w/
the arm.

Ride Height

We have designed most cars to have a ride height of about 2” lower than factory. To achieve the best ride quality &

handling, the shock absorber needs to be at 40-60% overall travel when the car is at ride height. This will ensure that the
shock will not bottom out or top out over even the largest bumps. Measuring the shock can be difficult, especially on
some front suspensions. Measuring overall wheel travel is just as effective and can be much easier. Most cars will have
4-6” of overall wheel travel. One easy way to determine where you are at in wheel travel is to take a measurement from
the fender lip (center of the wheel) to the ground. Then lift the car by the frame until the wheel is just touching the
ground, re-measure. This will indicate how far you are from full extension of the shock. A minimum of 1.5” of extension
travel (at the wheel) is needed to ensure that the shock does not top out. If you are more than 3” from full extension of
the shock then you are in danger of bottoming out the shock absorber.

Adjusting Spring Height

When assembling the CoilOver, screw the spring retainer tight up to the spring (0 preload). After entire weight of car is
on the wheels, jounce the suspension and roll the car forward and backward to alleviate suspension bind.

• If the car is too high w/ 0 preload then a smaller rate spring is required. Although threading the spring retainer
down would lower the car, this could allow the spring to fall out of its seat when lifting the car by the frame.

• If the car is too low w/ 0 preload, then preload can then be added by threading the spring retainer up to achieve
ride height. On 2.6” - 4” stroke shocks, up to 1.5” of preload is acceptable. On 5-7” stroke shocks, up to 2.5” of
preload is acceptable. If more preload is needed to achieve ride height a stiffer spring rate is required. Too
much preload may lead to coil bind, causing ride quality to suffer.