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

SKYLINE RV37
MAX IV GT 20SPEC Code No. 80230-AN017A
 
 


▲The above photo is an item for RV37.

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



Application 　 Specification
Engine VR30DDTT
Model Year 19/09 - 
Remarks 20GT-T model not confirmed. (as of August 2014)
　
  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 *1 671 ← 690 ～ 645 690 ～ 653
Against stock -19 ← 0 ～ -45 0 ～ -37
REAR Ride height *1 668 ← 702 ～　633 687 ～　644
Against stock -34 ← 0 ～ -69 -15 ～ -58
*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) 138 ( 14 ) 78 ( 8 )
Free height (mm) 200 250
Spring type Straight Straight
Recommended range to change spring rate N/mm(kgf/mm) ±19 ( 2 ) ±19 ( 2 )
Specification of damper
  F R
Damping force (Rebound/Damping)N* 1350 / 450 530 / 530
Default position of dial 15 15
Remaining damper stroke (Rebound/Damping)mm 52 / 47 73 / 86
* 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) 		402 ← 414 398 380 ← 380 351
Spring
Set length(mm) 		235 ← ← 243 323 ← 304 ←
Length to ride hight
adjuster (mm) 		63 ← 75 51 51 ← 70 27
Lever ratio 1.56 1.03
* Refer to the above explanation *3 of ride height information for drivable high and low limitations.


Test vehicle information
  F R
Vehicle weight kg 975 739
Tire size (Air pressure) kPa 245 / 40 - 19 ( 220 ) 245 / 40 - 19 ( 220 )
Wheel size 9 JJ × 19 inset 40 9 JJ × 19 inset 40
Alignment
(Toe/Camber) 		Test data + 0 mm / -1°30' 2 mm / -2°00'
Standard value - -
* Test data at HKS.


Parts List * It may be changed without prior notice.


Point
Even stock suspension in any mode provides a good response at speeds before the electronic system presence starts to be obvious. Go one step further and vehicles system kicks in and control over the vehicle starts to fade away, making it impossible to fully enjoy the potential of this vehicle with high grip tires. The situation changes to worse as the tires slip only when it’s too late for the system to properly apprehend it. With systems shut off, the vehicle becomes harder to control especially in turn-in, requiring very careful piloting or otherwise a harsh turn may lead to a complete loss of control.
MAXIV GT aims to provide a more stylish appearance lowering the vehicle and bringing out the performance potential of the vehicle. After rigorous tests spring rates, stroke length and overall vehicle balance was set up to stabilize tires contact patch with the road and maximize vehicle suspension system utilization and use vehicle to the limits. In addition, the damping force, fine-tuned with special piston speed settings was selected to ensure ride comfort. For users who prefer even more comfortable ride, we recommend selecting the softest setting at 30 clicks of damping force adjustment dial anticlockwise.
 
 
 
 
 
 
 
 
 


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