MAX IV GT 20SPEC SKYLINE GT-R
Explanation of the product Application chart

SKYLINE GT-R BNR34
MAX IV GT 20SPEC Code No. 80230-AN007A
 
 


▲The above photo is an item for BNR34.

An updated MAX IV GT with improved handling and comfort, an ulimate street suspension.



Application   Specification
Engine RB26DETT
Model Year 99/01 - 02/08
Remarks  
 
  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)
〇 (19.8) 〇 (19.8)


Ride Height mm
  Factory *2 Test data Adjustable range
High - Low *3
Drivable range
High - Low *4
FRONT Ride height *1 662 706 ~ 635 706 ~ 650
Against stock -44 0 ~ -71 0 ~ -56
REAR Ride height *1 664 699 ~ 626 699 ~ 631
Against stock -35 0 ~ -73 0 ~ -68
*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) 98 ( 10.0 ) 78 ( 8.0 )
Free height (mm) 200 250
Spring type Straight Straight
Recommended range to change spring rate N/mm(kgf/mm) ±20 ( 2 ) +10 ( 1 )
Specification of damper
  F R
Damping force (Rebound/Damping)N* 1450 / 370 700 / 320
Default position of dial 15 15
Remaining damper stroke (Rebound/Damping)mm 60 / 56 74 / 95
* 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)
275 305 269 507 535 474
Spring
Set length(mm)
246 236 251 319 312 319
Length to ride hight
adjuster (mm)
32 72 21 139 174 106
Lever ratio 1.11 1.00
* Refer to the above explanation *3 of ride height information for drivable high and low limitations.


Test vehicle information
  F R
Vehicle weight kg 900 721
Tire size (Air pressure) kPa 245 / 40 - 18 ( 200 ) 245 / 40 - 18 ( 200 )
Wheel size 9.0 JJ × 18 inset 24 9.0 JJ × 18 inset 24
Alignment
(Toe/Camber)
Test data in 0 mm / -1°30' in 2 mm / -2°00'
Standard value in 1 ± 1 mm / -0°50' ± 0°45' in 2.6 ± 2.6 mm / -1°05' ± 0°30'
* Test data at HKS.


Parts List * It may be changed without prior notice.


Point
MAX IV GT updated with the latest technology improved quality and performance. Use of the preload valve system and new shaped needle improves the well-balanced feeling of handling and ride comfort. As a result, it is achieved both steering performance with increased spring rate and comfortable ride feeling like never before thanks to the latest damping characteristic selected through numerous prototypes and test driving. Select preferable damping force once and it will suit various driving scenes. Even on a stiff setting, you can feel the damper working, quickly absorbing shocks without becoming completely firm. On soft settings, if loosen the dial, the vehicle will suit those who prefer the soft ride comfort. It was tuned the way it doesn’t undermine the handling completely.
 
 
 
 
 
 
 
 
 
 


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