HKS HIPERMAX CUP SERIES COILOVERS 2022+ TOYOTA GR86/SUBARU BRZ

The model in the photo is ZN8.

■Summary
A professional series designated product developed for the domestic racing event “TOYOTA GAZOO Racing GR86/BRZ Cup 2023”.
Based on the HIPERMAX R, tests were conducted on tires for the 2023 series according to the GR86/BRZ CUP vehicle regulations.
We welcomed Mr. Nobuteru TANIGUCHI as the development driver and set up the product.
Please adjust the damping force depending on the wear conditions of the tires, for example, setting it strong at qualifying or set weak at the final.
The roll amount is optimally tuned by utilizing the bump rubber actively that HKS has been studying for many years.
ASEA standard registered products. T.R.A. Approval Number: T.R.A. 230322-147
Since the product is set to focus on driving performance on a circuit, please be careful when driving on open roads.
This product can be overhauled, but the specification change service is not available.

Application

Engine FA24
Model Year 21/08 –
Remarks
Specification

FRONT REAR
Damping force adjustment 30 steps 30 steps
Base valve – –
Height adjustable lower bracket 〇 〇
Upper mount Spherical bearing Spherical bearing
Inverted/Normal type Inverted Normal
Damper/Spring layout Coilover Coilover
Spring rate change at factory Impossible Impossible
Damping force adjustment with wire – –
Helper spring
(Spring rate N/mm) – –
Ride Height
mm
Factory *2 Test data Adjustable range
High – Low *3 Drivable range
High – Low *4
FRONT Ride height *1 648 ← 664 ～ 630 664 ～ 630
Against stock -16 ← 0 ～ -34 0 ～ -34
REAR Ride height *1 641 ← 669 ～　612 669 ～　612
Against stock -28 ← 0 ～ -57 0 ～ -57
*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) 78 ( 8.0 ) 98 ( 10.0 )
Free height (mm) 170 170
Spring type Straight Straight
Recommended range to change spring rate N/mm(kgf/mm) – –
Specification of damper

F R
Damping force (Rebound/Damping)N* 1432 / 765 927 / 392
Default position of dial 15 15
Remaining damper stroke (Rebound/Damping)mm 36 / 51 22 / 49
* 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) 222 ← 238 204 240 ← 261 222
Spring
Set length(mm) 170 ← 157 170 166 ← 158 170
Length to ride hight
adjuster (mm) 33 ← 62 15 35 ← 64 13
Lever ratio 1.00 1.32
* Refer to the above explanation *3 of ride height information for drivable high and low limitations.

Test vehicle information

F R
Vehicle weight kg -　(700) -　(560)
Tire size (Air pressure) kPa 215 / 45 – 17 ( 240 ) 215 / 45 – 17 ( 240 )
Wheel size 7.5 JJ × 17 inset 44 7.5 JJ × 17 inset 44
Alignment
(Toe/Camber) Test data – –
Standard value in 0 ± 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.

■Technologies used in the HIPERMAX for GR86/BRZ Cup

High-performance Fluid SRF*

HKS has developed a High viscosity special oil against the heat sag through overheating. In addition, by increasing the damping from the very low-speed range, we have achieved a reliable steering feeling, tidiness, and high stability.

*SRF : Super Response Fluid

High-tension spring LVS*

A high-strength special wire rod that is ideal for sports driving is used in the product.
A high-performance spring that has excellent response and flexibility. (Used for the front only)

*LVS : Low Vibration Spring

Spring Retainer

The spring retainer on the upper side of the spring is the standard equipment. Make low friction comes true without occurring the side force. It improves driving stability by following the posture of a car.
* The spring in the image is different from the actual product.