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

SKYLINE GT-R BNR32
MAX IV GT 20SPEC Code No. 80230-AN008A
 
 


▲The above photo is an item for BNR32.

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



Application   Specification
Engine RB26DETT
Model Year 89/08 - 94/12
Remarks Standard Vehicle
 
  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)
○ ( 19.8 ) ○ ( 19.8 )


Ride Height mm
  Factory *2 Test data Adjustable range
High - Low *3
Drivable range
High - Low *4
FRONT Ride height *1 656 695 ~ 627 695 ~ 629
Against stock -39 0 ~ -68 0 ~ -66
REAR Ride height *1 656 671 ~ 608 671 ~ 608
Against stock -15 0 ~ -63 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) 98 ( 10 ) 78 ( 8 )
Free height (mm) 200 220
Spring type Straight Straight Barrel type
Recommended range to change spring rate N/mm(kgf/mm) ±20 ( 2 ) ±20 ( 2 )
Specification of damper
  F R
Damping force (Rebound/Damping)N* 1400 / 340 720 / 350
Default position of dial 15 15
Remaining damper stroke (Rebound/Damping)mm 43 / 56 62 / 74
* 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)
279 316 270 410 424 377
Spring
Set length(mm)
237 236 255 287 297
Length to ride hight
adjuster (mm)
29 67 2 43 57 0
Lever ratio 1.03 1.12
* 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 235 / 40 - 18 ( 230 ) 235 / 40 - 18 ( 230 )
Wheel size 9 JJ × 18 inset 22 9 JJ × 18 inset 22
Alignment
(Toe/Camber)
Test data out 1 mm / -2°00' in 0 mm / -2°33'
Standard value 0 ~ in 2 mm / -0°55' ± 45' in 2 ± 2 mm / -1°05' ± 30'
* Test data at HKS.


Parts List * It may be changed without prior notice.


Point
This coilover upgrades existing line-up damping force characteristics with the latest technology based on the HIPERMAX IV GT. Even with stiff springs, HKS achieves both great handling performance and ride comfort with a new damping force tuning method. The product suits for various driving scenes as never before. For users who prefer the ride comfort most, click the dial around 30 clicks counter-clockwise to loosen the damping force. Feel the flexible ride and comfort with the perfect balance, however, it won't be soft too much when accelerating. We recommend for the winding users click the dial around 15 clicks from the stiffest setting. For circuit driving users click the dial around 10 clicks from the stiffest setting. A stiff damping force setting without excessive firm feeling and it brings the best balance for both comfortable riding and driving performance.
The vehicle height data except test time came from the calculated value. This does not mean that the actual vehicle height becomes the same.
 
● Required modifications when installing the product
A hole drilling for the rear damping force adjusting dial is required. (at a rear interior)
 
 
 
 
 
 


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