HKS Hipermax IV GT Spec A Suspension Kit Subaru Impreza GDB

HKS Hipermax IV GT Spec A Suspension Kit Subaru Impreza GDB
HKS Hipermax IV GT Spec A Suspension Kit Subaru Impreza GDB
  • Model: 80230-AF002V
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  • RRP: €2.758,80 (incl. BTW)
  • Excl. BTW: €2.280,00
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MAX IV GT Spec-ACode No. 80230-AF002V
 
 



▲The above photo is an item for GDB・GDA・GGA.

Ultimate Street Damper with Latest Theory Based on MAX IV GT



Application　Specification
EngineEJ20(TURBO)
Model Year00/10 - 04/05
Remarks 
　
 FRONTREAR
Damping force adjustment30 steps30 steps
Base valve--
Height adjustable lower bracket○○
Upper mountSpherical bearingゴム固定
Inverted/Normal typeInvertedInverted
Damper/Spring layoutCoiloverCoilover
Spring rate change at factoryPossiblePossible
Damping force adjustment with wire--
Helper spring
(Spring rate N/mm)		○(4.7)○(19.8)



Ride Heightmm
 Factory *2Test dataAdjustable range
High - Low *3		Drivable range
High - Low *4
FRONTRide height *1642←693 ～ 635693 ～ 637
Against stock-46←0 ～ -580 ～ -56
REARRide height *1638←667 ～　628667 ～　634
Against stock-28←0 ～ -380 ～ -33
*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
 FR
Spring rate N/mm(kgf/mm)59+19 ( 6+2=8 )38+19 ( 4+2=6 )
Free height (mm)250250
Spring typeStraightStraight Barrel type
Recommended range to change spring rate N/mm(kgf/mm)±20 ( 2 )＋20 ( 2 )
Specification of damper
 FR
Damping force (Rebound/Damping)N*820 / 400400 / 220
Default position of dial1515
Remaining damper stroke (Rebound/Damping)mm70/56(6)78/91(11)
* The value of the damping force is at piston speed of 0.1m/sec.
Setting data
 FR
DefaultTestDrivable limit
High *		Drivable limit
Low *		DefaultTestDrivable limit
High *		Drivable limit
Low *
Length of
case (mm)		294←336285343←369340
Spring
Set length(mm)		282←←←297←←295
Length to ride hight
adjuster (mm)		22←6413122←148117
Lever ratio1.101.08
* Refer to the above explanation *3 of ride height information for drivable high and low limitations.



Test vehicle information
 FR
Vehicle weight kg897612
Tire size (Air pressure) kPa235 / 40 - 18 ( 220 )235 / 40 - 18 ( 220 )
Wheel size8.5 JJ × 18 off 508.5 JJ × 18 off 50
Alignment
(Toe/Camber)		Test data0 mm / -1°12'+2 mm / -1°48'
Standard value0 ± 3 mm / -0°30' ± 45'0 ± 3 mm / -1°40' ± 45'
* Test data at HKS.



Parts List * It may be changed without prior notice.


Point
"Ultimate Street Damper" developed for VAB model under supervision by rally driver Mr. Toshihiro Arai. Maintaining handlability and stability to enjoy driving on various road conditions were focused to develop this damper. Then, the genuine damper delivering the best ride comfort not only for the driver but also passengers was developed. The damping force tends to be stiff to secure the ride quality; however, it may cause the reduction of the tire’s surface pressure resulting in lowering the limit grip force. Also, the ride quality may deteriorate due to the vertical G force. Reviewing the geometry and stroke, establishing required spring rate and damping force, completely eliminating unnecessary elements achieved the handlability and stability in a high level that allows this product to deliver the outstanding road holding performance. Also, Mr. Arai was impressed of the improvement of understeering, which is a typical characteristic of GDB. With the latest suspension made by the latest technology, transformation of a car will be experienced. Smooth and appropriate steering and load movement is required to handle a car with this product developed under supervision by rally driver Mr. Toshihiro Arai. 
 
 
 
New bump rubbers act as sub-springs; therefore, to adjust the vehicle height, change the case length, and to adjust the timing when the bump rubber touches, change the case length and preload.
The tie rod may come in contact with the stabilizer when the damper is compressed under full-braking. 
The vehicle height except the tested height is the calculated value; therefore, actual height may be different.