Return of Drag Specification Dampers. Introducing the latest technologies to suit modern drag racing requirements.
The drag suspension designed based on HIPERMAX II Drag Suspension.
Parts such 300mm long spring, helper spring, etc. are selected for each vehicle model to maintain sufficient stroke amount and traction.
The shock-body length adjustable type is chosen to widen the vehicle height setting range and stroke distribution.
This drag suspension guarantees its performance in drag race.
Single Tube Damper Design
The single tube damper design was selected from well-established HKS suspension.
Its large diameter piston contribute excellent response and traction assurance.
Dust Boot
Protect the shaft from the flying stones.
PNE Coating
Using this special surface coating provides 5 times better durability over standard galvanizing. This prevents build-up around the threads of the adjustment areas allowing for easier height adjustment.
Pillow Ball Upper Mount
With the pillow ball upper mount, the shock absorber detects fine movement and generates accurate damping force from the beginning of stroke. Unnecessary movement is reduced and stable driving is possible.
New Design Needle
Newly designed needle has been utilized to adjust the damping characteristics of the very low speed and middle and high speed dampening to pursue the linear change across entire speed range.
Reduction of Unsprung Weight
In order to reduce unsprung weight, bracket, ride height adjusters and lock nuts are made from aluminum. (Not for all vehicles)
30 Step Damping Force Adjustment
30 levels of dampening adjustment allow fine tune adjustment for each tire and course conditions.
Application
| Engine | B58 |
|---|---|
| Model Year | 19/05 – |
| Remarks | *After lowering the vehicle height, the irradiation range of a radar and camera may become narrow that result in malfunction of TSS. |
Specification
| FRONT | REAR | |
|---|---|---|
| Damping force adjustment | 30 steps | 30 steps |
| Base valve | – | – |
| Height adjustable lower bracket | ○ | ○ |
| Upper mount | Spherical bearing | Spherical bearing |
| Inverted/Normal type | Inverted | Normal |
| Damper/Spring layout | Coilover | Separated |
| Spring rate change at factory | 〇 | ○ |
| Damping force adjustment with wire | – | ‐ |
| Helper spring (Spring rate N/mm) | – | – |
| Factory *2 | Test data | Adjustable range High – Low *3 | Drivable range High – Low *4 | ||
|---|---|---|---|---|---|
| FRONT | Ride height *1 | 665 | ← | 670 ～ 622 | 670 ～ 622 |
| Against stock | -22 | ← | -17 ～ -65 | -17 ～ -65 | |
| REAR | Ride height *1 | 678 | ← | 686 ～ 623 | 686 ～ 623 |
| Against stock | -20 | ← | -12 ～ -75 | -12 ～ -75 | |
*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) | 59 ( 6 ) | 98 ( 10 ) |
| Free height (mm) | 200 | 250 |
| Spring type | Straight | Straight |
| Recommended range to change spring rate N/mm(kgf/mm) | ＋10(1) | ±20 ( 2 ) |
Specification of damper
| F | R | |
|---|---|---|
| Damping force (Rebound/Damping)N* | 378 / 927 | 3310 / 294 |
| Default position of dial | 15 | 15 |
| Remaining damper stroke (Rebound/Damping)mm | 44 / 45 | 49 / 65 |
* 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) | 289 | ← | 289 | 264 | 323 | ← | 330 | 291 |
| Spring Set length(mm) | 188 | ← | 183 | 200 | – | – | – | – |
| Length to ride hight adjuster (mm) | 37 | ← | 42 | 0 | 57 | ← | 62 | 24 |
| Lever ratio | 1.18 | 1.69(spg) , 1.20(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 | 785.5 | 744 | |
| Tire size (Air pressure) kPa | 255 / 35 – 19 ( 220 ) | 275 / 35 – 19 ( 220 ) | |
| Wheel size | 9.5J × 19 | 10.5J × 19 | |
| Alignment (Toe/Camber) | Test data | in 0 mm / -2°07′ | in 0 mm / -1°30′ |
| Standard value | in 3.1 mm ± 2.3 mm / -1°45′ ± 0°30′ | in 2.7 mm ± 2.3 mm / -2°00′ ± 0°25′ | |
* Test data at HKS.
NOTE
GR Supra has a launch control to allow an excellent start. However, the stock suspension is set to assure traction in front and rear for multiple situation.
The MAX IV SP DRAG is specifically designed to provide traction on the rear tire and maintain that traction.
Bump rubber is attached to the rear shock in order to cope with the higher power and higher grip expected in the future. Bump rubber has the effect of a another spring.
The full-length adjustable suspension allows the stroke ratio (bump touch timing) to be changed without changing the vehicle height. Adjusting the shock length of the rear shock to a shorter value can delay the bump touch timing and increase the nose-up angle.
* This kit requires the error canceller kit also made by HKS*
Reviews
There are no reviews yet.