HKS
Hipermax MAX IV SP, R32-R34
Hipermax MAX IV SP, R32-R34
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【MAX IV SP】
The sport model to have a comfortable drive even in the winding road.
This "MAX IV SP" is the ultimate sport model for such a high grip radial tire. It will transfer the feelings straight to driver all kinds of information such as tire, road surface condition and traction. It's a perfect street sport model suspension for people who love to drive fast but still want comfort.
Detailed Product Info: HKS Hipermax MAX IV SP
Single Tube Damper Design
Mono tube dampers allow for more accurate and stable control and adjustment of dampening. Lower ride height and center of gravity gives a more stable ride.
Dust Boot
Protect the shaft from the flying stones.
PNE Coating
Using this special surface coating provides 5 times better durability over standard galvanising. This prevents build-up around the threads of the adjustment areas allowing for easier height adjustment.
M Shaft (Φ46 normal type)
With the new design of cylinder shaft since the HIPERMAX M-1, MAX IV increased the cylinder shaft size to have a firm damping even at a little stroke range by optimizing the oil pressure characteristic. We mainly adopted this to the rear damper that can have a better driving experience.
Adopted Pillow Ball Upper Mount
For more accurate and sharp steering.
New Design Needle
Newly designed needle has been used to revise the very low speed and middle and high speed dampening which is key to a comfort ride.
Reduction of Unsprung Weight
In order to reduce unsprung weight, bracket, ride height adjusters and lock nuts are made from aluminium. (Not for all vehicles)
30 Step Damping Force Adjustment
30 levels of dampening adjustment allow fine tune adjustment for street, circuit winding roads, highway, or the weight of the vehicle.
Application
| Engine | RB26DETT |
|---|---|
| Model Year | 89/08 - 94/12 |
| Remarks | V-SpecII |
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 | Normal | Normal |
| Damper/Spring layout | Coilover | Coilover |
| Spring rate change at factory | Possible | Possible |
| Damping force adjustment with wire | - | - |
| Helper spring (Spring rate N/mm) |
- | ○ ( 19.8 ) |
| Factory *2 | Test data | Adjustable range High - Low *3 |
Drivable range High - Low *4 |
||
|---|---|---|---|---|---|
| FRONT | Ride height *1 | 643 | ← | 690 ～ 598 | 690 ～ 641 |
| Against stock | -47 | ← | ～ -92 | ～ -49 | |
| REAR | Ride height *1 | 650 | ← | 675 ～ 589 | 675 ～ 610 |
| Against stock | -25 | ← | ～ -86 | ～ -65 | |
*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) | 118 ( 12 ) | 88 ( 9 ) |
| Free height (mm) | 200 | 200 |
| 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* | 1900 / 500 | 750 / 350 |
| Default position of dial | 15 | 15 |
| Remaining damper stroke (Rebound/Damping)mm | 30 / 60 | 56 /79 |
* 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) |
267 | ← | 313 | 267 | 395 | ← | 417 | 373 |
| Spring Set length(mm) |
198 | ← | 198 | 200 | 260 | ← | 260 | 274 |
| Length to ride hight adjuster (mm) |
49 | ← | 95 | 47 | 55 | ← | 77 | 19 |
| Lever ratio | 1.03 | 1.12 | ||||||
* Refer to the above explanation *3 of ride height information for drivable high and low limitations.
Test vehicle information
| F | R | ||
|---|---|---|---|
| Vehicle weight kg | - | - | |
| Tire size (Air pressure) kPa | 245 / 40 - 18 ( 230 ) | 245 / 40 - 18 ( 230 ) | |
| Wheel size | 9 JJ × 18 inset 22 | 9 JJ × 18 inset 22 | |
| Alignment (Toe/Camber) |
Test data | 0 mm / -2°00' | in 2 mm / -2°33' |
| Standard value | 0 ～ in 2 mm / -0°55' ± 45' | in 2 ± 2 mm / -1°05' ± 30' | |
* Test data at HKS.
Point
・Set for both of street and circuit and for people who like to drive fast. For people who want fast recovery and firm damping force.
・Set to have great drivability and handling and still have ability to track the road.
・Tested with high-grip radial tires.
●Modification for installation
・Need a hole to put through the rear damping force adjustment cable.
