HKS Hipermax IV GT Suspension Nissan Skyline R34 GT-T RB25DET ER34

The new Max IV sporty suspension. Awesome sporty drive with great control and comfortable ride in the street.

Application

Specification

Engine

RB25DET

Model Year

98/05 - 01/06

Remarks

GT-T(HICAS included)

FRONT

REAR

Damping force adjustment

30 steps

30 steps

Base valve

-

-

Height adjustable lower bracket

○

○

Upper mount

Rubber

Rubber

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 )

Ride Height

mm

Factory *2

Test data

Adjustable range
High - Low *3

Drivable range
High - Low *4

FRONT

Ride height *1

649

←

690 ～ 623

688 ～ 632

Against stock

-41

←

0 ～ -67

-2 ～ -58

REAR

Ride height *1

657

←

688 ～ 570

688 ～ 607

Against stock

-31

←

0 ～ -118

0 ～ -81

*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)

69 ( 7 )

49 ( 5 )

Free height (mm)

250

250

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*

843 / 167

588 / 177

Default position of dial

15

15

Remaining damper stroke (Rebound/Damping)mm

47 / 53

67 / 103

* 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)

320

←

335

313

492

←

522

466

Spring
Set length(mm)

242

←

222

250

301

←

301

324

Length to ride hight
adjuster (mm)

65

←

100

50

158

←

188

109

Lever ratio

1.10

1.03

* 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

235 / 40 - 18 ( 230 )

235 / 40 - 18 ( 230 )

Wheel size

8 JJ × 18 inset 30

8 JJ × 18 inset 30

Alignment
(Toe/Camber)

Test data

out 1 mm / -1°42'

in 3 mm / -1°45'

Standard value

in 5 ～ out 5 mm / -0°45' ± 0°45'

0 ～ out 5.2 mm / -0°55' ± 0°45'

* Test data at HKS.

Parts List * It may be changed without prior notice.

Point

・Set for city drive.
・The vehicle height data from other than the test is computational data.(The numbers does not guaranteeing the height)

●Process for installation
Required to make an hole for rear damping adjustment cable(rear interior)