HCI Custom Shocks

Custom Built Bilsteins and Home of the CMC

Home    Photo's    Track Tuning     HCI Valvings    HCI Price List   

Tuning your car with shocks (Asphalt)

In order to tune your car with shocks, we first have to look at the track. The corners are where we are going to get our speed. So Let’s look at the different stages of a corner where shocks do the most work.

 Stage one:Early Entry This is when you are off the gas and start applying brakes, also you are starting to turn into the corner.Weight is being transfered forward and to the outside wheels. RF and LF moves into compression and LR and RR moves into rebound.The LR rebound rate depends on decelleration rate, How fast is the transition from the straightaways to the apex of the corner.The wider the corners the LR rebound needs to be increased to tighten the car up on corner entry.

 Shocks most affected:  RF-Compression RR-Rebound LR-Rebound LF-Compression

  • How to tighten car: 
  • RF-Compression(Inc)
  • RR-Rebound (Dec)
  • LR-Rebound (Inc)
  • LF-Compression(Dec)

 

  • How to loosen car: 
  • RF-Compression(Dec)
  • RR-Rebound (Inc)
  • LR-Rebound (Dec)
  • LF-Compression(Inc)

 Stage two:Primary Entry This is when you are decreasing the pressure on the brakes and increase the steering input into the corner.Weight is being transfered to the outside wheels and rearward. The LF and RF remains in compression while the RR starts into compression.

Shocks most affected: LF-Compression RR-Compression RF-Compression

  • How to tighten car:
  • LF-Compression(Dec)
  • RR-Compression(Dec)
  • RF-Compression(Inc)

 

  • How to loosen car:
  • LF-Compression(Inc)
  • RR-Compression(Inc)
  • RF-Compression(Dec)

Stage Three:Middle of Corner This is the stage where the car takes a set, you start applying throttle and continue with steering input.Maximum force is now being applied to the RF and RR in compression and the LF and LR are now in rebound.

Shocks most affected: RF-Compression RR-Compression LR-Compression LF-Rebound RF-Rebound

  • How to tighten car:
  • RF-Compression(Inc)
  • RF-Rebound (Dec)
  • RR-Compression(Dec)
  • LF-Rebound (Inc)
  • LR-Compression(Dec)

 

  • How to loosen car:
  • RF-Compression(Dec)
  • RF-Rebound (Inc)
  • RR-Compression(Inc)
  • LR-Compression(Inc)  
  • LF-Rebound (Dec)

 Stage four: Middle of corner to exit of corner This is the stage where steady power is being applied and steering has been reduced.The weight is now being transfered to the inside wheels and rearward. The LF and RF are starting to go into rebound and the LR and RR are moving into compression.In a lot of cases the LR compression can be increased to tighten the car up on corner exit, this is due to track conditions.

Shocks most affected: RF-Rebound LR-Compression LF-Rebound RR-Compression

  • How to tighten car:
  • RF-Rebound (Dec)
  • LR-Compression(Inc)
  • LF-Rebound (Inc)
  • RR-Compression(Dec)

 

  • How to loosen car:
  • RF-Rebound (Inc)
  • LR-Compression(Dec)
  • LF-Rebound (Dec)
  • RR-Compression(Inc)

Tuning your car with shocks (Dirt)

Updated 12/1/07

 In order to tune your car with shocks, we first have to look at the track The corners are where we are going to get our speed. So let’s look at the different stages of a corner where shocks do the most work, keep in mind that these are base figures and don’t take into account the style of track, kind of car, set up, or driving style.

 Stage one: Early Entry This is when you are off the gas and start applying the brakes, also you are starting to turn into the corner.How fast the transition from straight-aways to the apex of corner will determine the effects of the LR shock, Wide turns will require less rebound in LR.

Shocks most affected: RF-Compression RR- Rebound LR- Rebound LF-Compression

  • How to tighten car:
  • RF-Compression(Dec)
  • RR-Rebound (Inc)
  • LR-Rebound (Dec)
  • LF-Compression (Inc)
  • 5Th Arm- Rebound (Inc)

 

  • How to loosen car up:
  • RF-Compression (Inc)
  • RR-Rebound (Inc)
  • LR-Rebound (Inc)
  • LF-Compression (Dec)
  • 5Th Arm-Rebound (Dec)

 Stage two: Primary Entry This is when you are decreasing the pressure on the brakes and increase the steering input into the corner.

Shocks most affected: LF-Rebound RR-Compression RF-Compression LF-Compression

  • How to tighten car:
  • LF-Rebound (Dec)
  • RR-Compression (Inc)
  • RF-Compression (Dec)
  • RF-Rebound (Inc)
  • LF-Compression (Inc)
  • 5Th Arm- Rebound (Inc)

 

  • How to loosen car up:
  • LF-Rebound (Inc)
  • RR-Compression (Dec)
  • RF-Compression (Inc)
  • RF-Rebound (Dec) 
  • LF-Compression (Dec)
  • 5Th Arm- Rebound (Dec)

 Stage Three: Middle of Corner This is the stage where the car takes a set, you start applying throttle and continue with steering input.

 Shocks most affected: RF-Compression RR-Compression LF-Rebound LR-Compression RF-Rebound

  • How to tighten car:
  • RF-Compression(Dec)
  • RF-Rebound (Inc)
  • RR-Compression(Inc)
  • RR-Rebound (Inc)
  • LF-Rebound (Dec)
  • LR-Compression(Dec)
  • LR-Rebound (Dec) 

 

  • How to loosen car up:
  • RF-Compression(Inc)
  • RF-Rebound (Dec)
  • RR-Compression(Dec)
  • LF-Rebound (Inc) Sweeping turns
  • LF-Rebound (Dec) Small Radius Turns
  • LF-Compression (Dec) 
  • LR-Compression(Inc)
  • LR-Rebound (Inc) 

 Stage four: Middle of corner to exit of corner This is the stage where steady power is being applied and steering has been reduced.In a lot of cases increasing the compression on LR has tightened the car. Example: Dry slick tracks.

Shocks most affected: RF-Rebound LR-Compression LF-Rebound RR-Compression

  • How to tighten car:
  • RF-Rebound (Dec)
  • in some cases an inc in RF rebound will tighten car
  • LR-Compression(Dec)
  • LF-Rebound (Dec)
  • RR-Compression(Inc)
  • RR-Rebound(Dec)

 

  • How to loosen car up:
  • RF-Rebound (Dec)
  • LR-Compression(Inc)
  • LF-Rebound (Inc)
  • RR-Compression(Dec)


HCI Shock Dyno Service
1005 Westbury Sq.
Jackson, Mississippi 39212
601-372-3862