MAX IV SP RX-8
Explanation of the product Application chart

RX-8 SE3P
MAX IV SP Code No. 80250-AZ003
 
 


▲The above photo is an item for SE3P.

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



Application   Specification
Engine 13B-MSP
Model Year 03/04 - 12/06
Remarks  
 
  FRONT REAR
Damping force adjustment 30 steps 30 steps
Base valve - -
Height adjustable lower bracket
Upper mount Spherical bearing Stock
Inverted/Normal type Normal Normal
Damper/Spring layout Coilover Coilover
Spring rate change at factory Possible Impossible
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 *1 666 661 685 ~ 623 685 ~ 623
Against stock -19 -24 0 ~ -62 0 ~ -62
REAR Ride height *1 659 654 679 ~ 639 679 ~ 639
Against stock -26 -31 -6 ~ -46 -6 ~ -46
*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 ( 16.0 ) 98 ( 10.0 )
Free height (mm) 170 -
Spring type Straight Special shape
Recommended range to change spring rate N/mm(kgf/mm) ±20 ( 2 ) -
Specification of damper
  F R
Damping force (Rebound/Damping)N* 1618 / 446 829 / 520
Default position of dial 15 15
Remaining damper stroke (Rebound/Damping)mm 40 / 47 62 / 54
* 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)
369 366 382 342 395 390 400 375
Spring
Set length(mm)
215 215 218 242 227 242
Length to ride hight
adjuster (mm)
30 27 43 0 25 20 45 5
Lever ratio 1.45 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 - -
Tire size (Air pressure) kPa 225 / 40 - 19 ( 220 ) 225 / 40 - 19 ( 220 )
Wheel size 9 JJ × 19 inset 45 9 JJ × 19 inset 40
Alignment
(Toe/Camber)
Test data out 3 mm / -2°24' in 4 mm / -2°30'
Standard value in 2 ± 3 mm / 0°00' ± 1°00' in 3 ± 3 mm / -1°30' ± 1°00'
* Test data at HKS.


Parts List * It may be changed without prior notice.


Point
Responding to a lot of anticipates from the customers who enjoy circuit driving, the MAX IV SP for RX-8 is now available.
All-around damping force setting was made from a street to circuit drive without too much stiffness/softness by reducing an excessive damping force.
A test vehicle used a model "Spirit R" equipped with LSD and the tires changed to ADVAN A052, 18-inch that is assuming the compatibility for recent more high-grip tires. For achieving the best damping force setting without any deficient or excessive spring rate or damping force, a final check was held at a racing course in Fuji Speedway.
RX-8 is a car that is difficult to ensure sufficient rear stroke amount due to the rear suspension shape. For ensuring the stroke amount by employing the ride height adjuster thread cutting part to the shock body length adjustable bracket. Overcoming the weak point of RX-8 and improved the stability of a car.
Ensures the stroke amount by using helper springs at the top and bottom of the spring even though a high rate spring is used at the front (16K)/at the rear (10K). As a result, it sufficiently improves ground contact properties.
We recommend the setting around 15 to 20 steps for street use, 5 to 10 steps for circuit use depending on your preference.
When changing the vehicle height of the rear, adjust the thread length in the same adjusted amount as the shock body length. Note: The rear shock body length in the table is a reference value due to using the dedicated shaped spring in the shock body. Make sure the engagement of the locking spring, when adjusting the length especially at the near lower limit.
The stock upper mount may contact the bracket lock nut when the piston rod fully compressed if setting the rear shock body length shorter than the lower limit for driving.
The spring seat may contact the bracket lock nut when the piston rod fully extended if setting the rear shock body length longer than the upper limit for driving.
When changing the vehicle height of the rear more than 5 mm higher than the height at the shipment, set the shock body length at the upper limit then adjust the height only by thread length by applying the pre-load to the spring.
Clearance from the ground has been confirmed in the tested vehicle equipped with 225/40R19 tires. Please be careful an under panel, fuel tank and, catalyzer not to touch with the ground due to the small ground clearance of RX-8. Especially please pay attention when using the common size of 265/35R18, 245/40R18 that has a small outer diameter.


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