MAX IV SP IMPREZA
Explanation of the product Application chart

IMPREZA GVB
MAX IV SP Code No. 80250-AF001
 
 


▲The above photo is an item for GRB.

The sport model to have a comfortable drive even in the winding road.



Application   Specification
Engine EJ20(TURBO)
Model Year 10/07 - 14/08
Remarks  
 
  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 Coilover
Spring rate change at factory Possible Possible
Damping force adjustment with wire - -
Helper spring
(Spring rate N/mm)
○ ( 19.8 ) ○ ( 19.8 )


Ride Height mm
  Factory *2 Test data Adjustable range
High - Low *3
Drivable range
High - Low *4
FRONT Ride height *1 659 685 ~ 614 685 ~ 623
Against stock -26 0 ~ -71 0 ~ -62
REAR Ride height *1 648 684 ~ 619 684 ~ 619
Against stock -36 0 ~ -65 0 ~ -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 ) 98 ( 10 )
Free height (mm) 170 170
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* 2373 / 432 1187 / 157
Default position of dial 15 15
Remaining damper stroke (Rebound/Damping)mm 55 / 58 49 / 66
* 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)
281 305 268 251 275 251
Spring
Set length(mm)
220 220 240 223 221 244
Length to ride hight
adjuster (mm)
63 87 30 22 48 1
Lever ratio 1.10 1.38
* Refer to the above explanation *3 of ride height information for drivable high and low limitations.


Test vehicle information
  F R
Vehicle weight kg 893 627
Tire size (Air pressure) kPa 245 / 40 - 18 ( 230 ) 245 / 40 - 18 ( 190 )
Wheel size 8.5 JJ × 18 off 55 8.5 JJ × 18 off 55
Alignment
(Toe/Camber)
Test data 0 mm / 2°36' 0 mm / 1°54'
Standard value 0 ± 3 mm / -0°40' ± 45' 0 ± 3 mm / -1°35' ± 45'
* Test data at HKS.


Parts List * It may be changed without prior notice.


Point
This product utilizes an adjustment dial that allows various driving conditions from street to circuit with high grip radial tires.
For further performance improvement, this product was developed with latest parts such as new shape needle, M-shaft, aluminum bracket, etc. based on Hipermax III Sports 09 Spec,
Its adequate stiffness of the damping force enables the smooth cornering. Also, the setting was performed to take a load toward the rear at the exit of the corner.
No upthrust over the level difference of a road and stable vehicle movement without floating feeling can be provided, which maintains the comfortable driving on a street.
The helper springs are installed on both front and rear. The rebound stroke for the spring rate is sufficient so it provides superior road surface follow-up property and stability in the criteria zone, and has a positive effect on traction. Its smooth rear sliding is distinctive.
Adjust the dial to 10-15 for circuit driving, to 15-20 for street driving, and to 20-30 if better ride quality is prioritized for other passengers.
Since the front damper is close to the front tire and wheel, make sure the damper does not come into contact with any other parts of a vehicle when lowering the vehicle height. If the damper comes into contact with any other parts of a vehicle, slide the tire wheel outward using a wheel spacer or a similar tool.
The rear case length is set to the lower limit before shipment; it cannot be shorter. To lower the vehicle height, adjust the preload.
 
 
 


[ CLOSE ]

 

 

HKS