MAX IV SP RX-7
Explanation of the product Application chart

RX-7 FD3S
MAX IV SP Code No. 80250-AZ001
 
 


▲The above photo is an item for FD3S.

The sport model to have a comfortable drive even in the winding road.



Application   Specification
Engine 13B-REW
Model Year 91/12 - 02/08
Remarks  
 
  FRONT REAR
Damping force adjustment 30 steps 30 steps
Base valve - -
Height adjustable lower bracket
Upper mount Spherical bearing Spherical bearing
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 )


Ride Height mm
  Factory *2 Test data Adjustable range
High - Low *3
Drivable range
High - Low *4
FRONT Ride height *1 636 665 ~ 598 665 ~ 628
Against stock -29 0 ~ -67 0 ~ -37
REAR Ride height *1 642 677 ~ 589 677 ~ 589
Against stock -35 0 ~ -88 0 ~ -88
*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) 157 ( 16 ) 157 ( 16 )
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* 3109 / 598 1893 / 392
Default position of dial 15 15
Remaining damper stroke (Rebound/Damping)mm 28 / 57 50 / 50
* 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)
373 392 370 301 323 283
Spring
Set length(mm)
198 198 200 223 220 243
Length to ride hight
adjuster (mm)
47 66 42 45 70 7
Lever ratio 1.49 1.40
* Refer to the above explanation *3 of ride height information for drivable high and low limitations.


Test vehicle information
  F R
Vehicle weight kg 650 613
Tire size (Air pressure) kPa 235 / 40 - 18 ( 220 ) 255 / 35 - 18 ( 220 )
Wheel size 9.5 JJ × 18 off 32 10 JJ × 18 off 45
Alignment
(Toe/Camber)
Test data out 1 mm / 2°24' 0 mm / 2°00'
Standard value in 1 ± 3 mm / 0°05' ± 45' in 2 ± 3 mm / -1°15' ± 45'
* Test data at HKS.


Parts List * It may be changed without prior notice.


Point
・The spring rate is a little high as 16kg, but the leverage is high and the damping force for bumping is set low, therefore it has less reaction to the road surface and have comfortable drivability.
・It’s not as hard as it seems for the rate, but set to move effectively. We set it for smooth rolling.
・To have a good rear stability, we set the stroke allocation and damping force for better braking and stable traction. It’s also set to have easy and smooth reverse steering control.
 
 
 
 
 
 
 
 


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