MAX IV GT IMPREZA
Explanation of the product Application chart

IMPREZA GVF
MAX IV GT Code No. 80230-AF001
 
 


▲The above photo is an item for GRB.

Awesome control and comfort ride on the street for a sporty drive. The new Max IV sporty suspension.



Application   Specification
Engine EJ25(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 Rubber Rubber
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)
- -


Ride Height mm
  Factory *2 Test data Adjustable range
High - Low *3
Drivable range
High - Low *4
FRONT Ride height *1 659 657 683 ~ 607 683 ~ 648
Against stock -24 -26 0 ~ -76 0 ~ -37
REAR Ride height *1 651 680 ~ 598 680 ~ 617
Against stock -29 0 ~ -82 0 ~ -63
*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) 78 ( 8 ) 59 ( 6 )
Free height (mm) 220 200
Spring type Straight Barrel type 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* 1422 / 373 461 / 177
Default position of dial 15 15
Remaining damper stroke (Rebound/Damping)mm 42 / 71 40 / 60
* 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)
269 267 291 265 253 264 234
Spring
Set length(mm)
214 220 195 185 200
Length to ride hight
adjuster (mm)
63 61 84 53 39 60 14
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 904 628
Tire size (Air pressure) kPa 245 / 40 - 18 ( 230 ) 245 / 40 - 18 ( 190 )
Wheel size 9.0 JJ × 18 off 45 9.0 JJ ×18 off 45
Alignment
(Toe/Camber)
Test data 0 mm / -2°36' 0 mm / -1°54'
Standard value 0 ± 3 mm / -0°45' ± 45' 0 ± 3 mm / -1°30' ± 45'
* Test data at HKS.


Parts List * It may be changed without prior notice.


Point
・It didn't give up the driving performance and at the same time it provides comfort in town driving. MAX IV has advanced even more from the MAX III.
・We have adopted newly developed needle and variable port system for both front and rear that makes damping force at the low speed range, which is very important for comfortable and great steering with no upthurst and floating feel.
・With the new design of piston and M shaft for rear damper provides better oil pressure that gives comfortable dive.
・The damping level can be adjusted with dial for slow drive or winding road drive or all other type of situation.
・The normal damper has not so good driving experience but the MAX IV provides awesome feeling and performance in driving, especially for a town drive.
・Even setting the damping level to soft doesn't make it floating feeling so when having a long distance driving, you won't get tired and have a great comfort for the passenger.
・When you set the damping level to hard, you can feel directly of the step differrence.
・Set damping level 20 to 25 for soft and 10 to 15 for hard setting.
・To have a balance for front and rear of A line of sedan(GVF), shorten the front for 2mm.
 
 


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