MAX IV GT Spec-A BRZ
Explanation of the product Application chart

BRZ ZC6
MAX IV GT Spec-A Code No. 80230-AF012V
 
 


▲The above photo is an item for BRZ .

Ultimate Street Damper with Latest Theory Based on MAX IV GT



Application   Specification
Engine FA20
Model Year 12/03 - 
Remarks Confirmed with the late model of 86 automatic.
 
  FRONT REAR
Damping force adjustment 30 steps 30 steps
Base valve - -
Height adjustable lower bracket
Upper mount Spherical bearing 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)
- ○ ( 19.8 )


Ride Height mm
  Factory *2 Test data Adjustable range
High - Low *3
Drivable range
High - Low *4
FRONT Ride height *1 646 671 ~ 610 671 ~ 629
Against stock -25 0 ~ -61 0 ~ -42
REAR Ride height *1 643 671 ~ 626 671 ~ 626
Against stock -28 0 ~ -45 0 ~ -45
*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) 39+19 ( 4+2=6 ) 39+19 ( 4+2=6 )
Free height (mm) 200 170
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* 400 / 300 350 / 350
Default position of dial 15 15
Remaining damper stroke (Rebound/Damping)mm 56/ 57 68 /48
* 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)
216 240 200 248 270 235
Spring
Set length(mm)
R:186 L:189 206
Length to ride hight
adjuster (mm)
R:37 L:34 R:61 L:58 R:21 L:18 33 55 20
Lever ratio 1.06 1.28
* 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 215 / 45 - 17 ( 240 ) 215 / 45 - 17 ( 240 )
Wheel size 7 JJ × 17 off +48 7 JJ × 17 off +48
Alignment
(Toe/Camber)
Test data 0 mm / -1°18' 2 mm / -2°12'
Standard value 0±3mm / 0°00'±45' 2±3 mm / -1°12'±45'
* Test data at HKS.


Parts List * It may be changed without prior notice.


Point
"Ultimate Street Damper" developed under supervision by rally driver Mr. Toshihiro Arai. To provide suspension available for all road conditions (stabilized road holding performance), the stroke was extended. Tests of the spring bump rubber, and damping force were conducted many times to provide the best road holding performance. Additionally, ride comfort was much enhanced than the existing MAX IV GT.
There is a range where the load shift is controlled in a critical area. Without unfavorable understeering and/or sudden oversteering and with reliable traction, high quality and pleasant driving feeling are created to enjoy BRZ for a long time.
The best handling dial position Rally driver Mr. Toshihiro Arai selected at the time of testing at Gunsai is 15 for both front and rear.
The value within the parenthesis under the stroke section is the stroke length to the bump rubber.
 
●Required Modification for Installation
Making slit on the rear interior liner for the rear adjustment dial is required.
 
 
 
 


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