From Nissan 350Z & 370Z Wiki
- Note: The blower is being redesign
by HKS Japan due to
relability issues with the Rotrex unit.A demonstration unit was displayed at SEMA IAS 2005 in Philidelphia. ETA was not given. Currently the kit is not avaiable in the US. It may not be available for sale in the US due to patent infringements.
The HKS Rotrex Supercharger Kits for the 350Z are the latest in forced induction systems for the aftermarket. The centrifugal type supercharger features a unique traction drive, with a closed oil circulation system. The traction drive utilizes fixed ratio planetary rollers that are more efficient then traditional gear-wheels. Because the planetary rollers do not have teeth like traditional gear-wheels noise is decreased and reliability is increased. The closed oil circulation system cycles a specially-formulated Traction Oil that lubricates and cools the supercharger, dramatically increasing longevity and reliability. The Traction Oil is cooled through a liquid to air oil cooler included with each kit.
All HKS Rotrex Supercharger Kits are developed as complete bolt-on systems. For certain applications HKS will include a front-mount air-to-air intercooler, Super Mega Flow intake, Bypass Valve, additional injectors, upgraded fuel pump and S/C Fuel Computer. Also included with each kit is a high-performance cast aluminum bracket which has been precisely engineered to reduce noise and vibration.
Contents |
Kit Overview
| Manufacturer | HKS |
| List Price | $7,250 |
| Found Price | $5,100 |
| Application | 2003-2005 350Z |
| Base PSI | 7psi |
| Base Power | 315hp |
| Base Torque | |
| Compressor | Rotrex C30-94, HKS Turbine, Centrifugal with planetary friction rollers |
| Intercooler | Air-to-Air front mount intercooler (1/2 width) |
| Piping | Mandrel bent aluminum intercooler piping, Cast aluminum intake tube. |
| Fuel | Upgraded fuel pump, 2x 525cc add-on injectors (inside plenum) |
| EMU | HKS_FCON_S (direct plug harness) |
| Air Filter | HKS Super Mega Flow Intake Filter |
| Blow Off Valve | HKS Standard Bypass Valve |
Rotrex C30-94 Centrifugal Supercharger
The HKS Rotrex kit for the 350Z is built around the latest Rotrex roller-driven superchargers. HKS has swapped out the compressor in favor of their own turbine housing and wheel.
HKS FCON S
Potential Upgrades
Potential upgrades for this kit are:
- Pulley Upgrade
- Available from Rotrex USA Distributor Wheel to Wheel Power.(http://www.w2wpowertrain.com/pc-30-64-rotrex-supercharger-pulley-100mm--110mm.aspx)
- A new pulley is not yet available from HKS directly. However from extensive research it has been found that the smaller pullies may be obtained directly from Rotrex. Pullies are offered in various diameters to achieve the user's desired boost level. As always, tuning is necessary when changing boost levels. The recommended pulley size is 100MM. This will bring the blower RPMs to its limit on the stock redline. Upgraded redlines will overspin the blower. Potential detriment to the blower through overspinning is not documented. A larger intercooler is needed (http://www.hksusa.com/products/?id=725). HKS part #17300-272287 is most likely the appropriate choice.
- Intercooler
- Depending on your power goals, it is possible to upgrade to a larger intercooler that will flow more air. Some custom piping will be necessary, but this upgrade has already been accomplished by HKS themselves. It remains to be found if HKS will offer a stronger supercharger package in the future with a larger intercooler system.
- EMU
- The HKS Rotrex unit comes with the HKS F-Con SZ engine management system. This is an advanced piggyback style Key_Term:EMU designed with a conservative tune in mind. It is a direct plug and play unit that comes with an external harness terminated with OEM style connectors. This unit may only be tuned by a certified HKS Pro dealer. However it is possible and easy to change out the F-Con SZ for another engine management system with readily available support such as the TurboXS UTEC or Greddy e-Manage Ultimate. It uses a map sensor for accurate accounting of boost. This unit also has timing control with no risk of damage to the coils when the key is left in the "ON" position (a la Emanage/Emanage Ultimate). The unit can be swapped out for a HKS F-Con Pro for complete standalone engine management with the addition of an inlet air temp sensor.
- Injectors
- Two addon injectors are include with the HKS supercharger. This was done to achieve CARB certification which prevents changing of the stock injectors. The injectors reside inside the OEM intake manifold. Replacing all 6 injectors with larger ones will require a retune, and is only necessary if changing to a smaller pulley (higher boost pressure).
Images
Official HKS
 Installed on the 350Z |
system overview - front |
 system overview - rear |
 HKS bypass valve |
 HKS dyno chart |
 kit contents |
 cast aluminum intake tube |
 HKS turbine housing |
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Rotrex roller system |
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User Installed
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Notes
A few notes regarding this system:
- Utilizes special traction oil in a closed ciculation system.
- Cooled through a Air-to-Air cooler.
- Very conservative base tune (= safe).
- HKS Pro-Dealer required to unlock and modify FCON maps
- Low noise compared to gear-type compressors.
- All necessary parts also included.
- OEM fit and finish
Resources
External Links
Links outside of this site pertaining to this system:
Here are web articles duplicated on the 350z-tech Wiki for your reading pleasure.
Here are some links to external sites covering the Rotrex units.
Forum Discussions
Great forum topics to read and learn more about this system:
File Downloads
Below is a scanned PDF of the included installation manual. It inclues torque specs, parts list, and step by step procedures.
Below are download links to PDF files including detailed specifications on the Rotrex supercharger system.
