Code No. 80310-AH005C
Application
| Engine | K20C |
|---|---|
| Model Year | 22/09 - |
| Remarks |
Specification
| FRONT | REAR | |
|---|---|---|
| Damping force adjustment | 30 steps | 30 steps |
| Base valve | - | - |
| Height adjustable lower bracket | × | 〇 |
| Upper mount | Spherical bearing | Spherical bearing |
| Inverted/Normal type | Inverted | Normal |
| Damper/Spring layout | Coilover | Separated |
| Spring rate change at factory | Possible | Possible |
| Damping force adjustment with wire | - | 〇 |
| Helper spring (Spring rate N/mm) | 〇 (19.8) | 〇 (19.8) |
| Factory *2 | Test data | Adjustable range High - Low *3 |
Drivable range High - Low *4 |
||
|---|---|---|---|---|---|
| FRONT | Ride height *1 | 657 | 640 | 660 ～ 636 | 660 ～ 651 |
| Against stock | -18 | -35 | -15 ～ -39 | -15 ～ -24 | |
| REAR | Ride height *1 | 659 | 640 | 680 ～ 637 | 680 ～ 637 |
| Against stock | -13 | -32 | 8 ～ -35 | 8 ～ -35 | |
*1. Height from road surface to fender arch.
*2. Height at factory is the data tested at HKS with the setting of Full Kit. (HKS' recommended setting.)
*3. Adjustable range (However, the lowest value may not be road legal.
Even within the adjustable range, car body, arm etc. may contact. In such case, it will be hard to drive.
Damper oil leakage or any other problems caused by low ride height setting from the factory setting will void the warranty of the product.)
*4. Drivable range that there is no contact of car body or arms etc. (However, change of tire/wheel size may cause a problem.)
Caution). Actual data depends on each vehicle.
Kit information
Spring of Full Kit
| F | R | |
|---|---|---|
| Spring rate N/mm(kgf/mm) | 137 ( 14.0 ) | 137 ( 14.0 ) |
| Free height (mm) | 150 | 150 |
| Spring type | Straight | Straight |
| Recommended range to change spring rate N/mm(kgf/mm) | +20 ( 2 ) | +20 ( 2 ) |
Specification of damper
| F | R | |
|---|---|---|
| Damping force (Rebound/Damping)N* | 1172 / 530 | 294 / 280 |
| Default position of dial | 15 | 15 |
| Remaining damper stroke (Rebound/Damping)mm | 58 / 41 | 88 / 61 |
* The value of the damping force is at piston speed of 0.1m/sec.
Setting data
| F | R | |||||||
|---|---|---|---|---|---|---|---|---|
| Default | Test | Drivable limit High * |
Drivable limit Low * |
Default | Test | Drivable limit High * |
Drivable limit Low * |
|
| Length of case (mm) |
306 | ← | 306 | 306 | 405 | 405 | 429 | 382 |
| Spring Set length(mm) |
203 | 211 | 200 | 209 | - | - | - | - |
| Length to ride hight adjuster (mm) |
52 | 44 | 55 | 46 | 48 | 36 | 66 | 29 |
| Lever ratio | 1.00 | 1.18(spg) , 0.94(dmp) | ||||||
* Refer to the above explanation *3 of ride height information for drivable high and low limitations.
Test vehicle information
| F | R | ||
|---|---|---|---|
| Vehicle weight kg | 890 (890) | 541 (540) | |
| Tire size (Air pressure) kPa | 265 / 35 - 18 ( 200 ) | 265 / 35 - 18 ( 200 ) | |
| Wheel size | 9.5 JJ × 18 inset 45 | 9.5 JJ × 18 inset 45 | |
| Alignment (Toe/Camber) |
Test data | out 1 mm / -3°57' | out 1 mm / -1°59' |
| Standard value | in 1 ± 2 mm / -0°18' ± 0°30' | in 2 ± 2 mm / -1°12' ± 0°45' | |
* Test data at HKS.
Parts List * It may be changed without prior notice.
Points
- Although the FL5 is equipped with highly sophisticated electronically controlled shock absorbers, we were concerned about the stiffness of the rear and the instability caused by the high ride height during hardcore driving at the track. We also found the rear suspension to be overly stiff in Comfort mode for street driving.
- We aimed to enhance sporty driving performance while preserving the strengths of the stock suspension and delivering a more comfortable street ride than the factory Comfort mode.
- The front and rear spring rates are high with 14 kg/mm. However, by combining low-vibration springs with precisely tuned dampers (refined through years of development), we have achieved a ride quality that far surpasses what is possible with the stock suspension.
- Testing was conducted at Fuji Speedway using size 265/35R18 ADVAN A052 tires.
- The rear damping dial is positioned for easy adjustment even while wearing a helmet at circuits.
- The tested ride height reflects adjustments made to increase negative camber from the factory settings. Please note that with stock wheels, the front tires and dampers may come into contact.
- If the front ride height is set to less than 46 mm using stock tire and wheel sizes, the tires and suspension components may interfere near the steering lock. This may vary depending on wheel rim width and offset.
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