HOLDEN 5.0L EFI 2400 WHIPPLE SUPERCHARGER KIT
Stage 1 — Non-Intercooled Package for VN–VS Models and Engine Conversions
Vehicle application: Holden VN, VP, VR and VS models fitted with the Holden 5.0L EFI V8
Additional applications: Holden 5.0L EFI engine conversions, subject to vehicle and installation clearances
Engine application: Stock to mildly modified engines, including larger-capacity stroker combinations
Boost level: Up to 10 psi, depending on the engine combination, pulley selection, fuel system and tune
Drive system: Independent six-rib supercharger drive
Supercharger: Whipple Gen 4 2.4L twin-screw
Important: This listing is for non-VT applications. Engine-conversion installations may require vehicle-specific modifications and must be checked for bonnet, firewall, cooling-system and accessory clearances before installation.
Serious Performance for the Holden 5.0L EFI V8
Yella Terra’s comprehensive Holden 5.0L supercharger packages use the latest Whipple 2.4L twin-screw supercharger, featuring the Gen 4 rotor profile for greater efficiency and outstanding horsepower and torque throughout the rev range.
These are the only Australian kits combining Whipple’s advanced twin-screw technology, distinctive supercharger whine and Yella Terra’s purpose-designed low-profile intake system.
The Stage 1 non-intercooled package is designed for stock to mildly modified engine applications. The large 2.4L compressor capacity and efficient twin-screw design deliver immediate throttle response, enormous torque and serious horsepower.
The 2.4L Whipple works exceptionally well on standard 304ci engines, while its capacity and horsepower potential also make it suitable for modified engines and larger-capacity stroker combinations.
All major components are proudly manufactured and precision-machined by Yella Terra in Australia—ready to boost your mild-to-wild Iron Lion.
Vehicle Applications
This package is designed for Holden 5.0L EFI-powered:
- VN Commodore
- VP Commodore
- VR Commodore
- VS Commodore
- Relevant Holden and HSV variants
- Custom Holden 5.0L EFI engine conversions
The low-profile supercharger and manifold assembly is designed to fit beneath the standard bonnet in supported VN–VS applications.
For custom engine conversions, the installer must confirm all bonnet, firewall, radiator, cooling-system, throttle-body, fuel-system and accessory clearances. Yella Terra cannot guarantee under-bonnet fitment in modified or non-standard vehicles.
Upgradeable to Intercooling
The intake manifold is supplied pre-machined to accept the Yella Terra water-to-air intercooler system. This allows the Stage 1 non-intercooled kit to be upgraded later without changing the installed height of the supercharger.
The complete intercooler system is available separately.
Kit Features and Benefits
| Kit feature | Benefit |
|---|---|
| Complete Whipple 2.4L Gen 4 non-intercooled package for boost levels up to 10 psi | Designed for street-performance applications, delivering substantial power and torque without requiring extensive internal engine modifications on a suitable stock or mildly modified engine. |
| Whipple Gen 4 twin-screw rotor profile | Produces strong boost throughout the rev range, improved efficiency and more horsepower per pound of boost. |
| Large rear intake passage with an integrated 1.5-inch bypass system | Supports high airflow, responsive boost control and smooth operation during part-throttle and off-boost driving. |
| Multi-fit throttle-body mounting flange | Accommodates the specifically supported LS1, Peter Starr and modified LS3 throttle-body configurations listed below. |
| CNC-machined low-profile open-plenum manifold | Promotes consistent airflow distribution to all cylinders while maintaining a low overall installation height. |
| Manifold designed for Holden EFI asymmetrical-port cylinder heads | Provides the correct fitment for the Holden 5.0L EFI engine. |
| Independent six-rib supercharger drive | Drives the supercharger without altering or overloading the factory accessory-belt system. |
| CNC billet supercharger snout, heavy-duty tensioner and billet 160 mm crank pulley | Provides reliable belt control, improved belt wrap and reduced belt slip under load. |
| Compatible with the factory fuel rails and lines | Simplifies installation and helps retain a clean, factory-style appearance. |
| Remote 2-bar MAP sensor and plug-and-play extension looms | Reduces wiring modifications and simplifies sensor installation. |
| Complete installation hardware | Supplied with the components required to install the supercharger system, excluding the additional items specifically noted below. |
| Step-by-step colour fitting instructions | Provides the installer with a clear installation process from start to finish. |
Independent Supercharger Drive
The supercharger operates through its own dedicated six-rib belt system. No changes are required to the existing accessory-belt arrangement in standard supported applications.
Driving the supercharger independently prevents additional blower load from being transferred through the factory power-steering pump, water pump, alternator and other accessory-drive components. This helps reduce the risk of premature bearing or shaft damage.
An optional eight-rib drive upgrade is available for higher-boost applications.
Throttle-Body Compatibility
All Yella Terra intake manifolds are machined to the same specification and are designed specifically for:
- LS1 three-bolt 90 mm cable throttle bodies
- Peter Starr four-bolt 90 mm throttle bodies
Two additional mounting holes are provided to accommodate later LS3 throttle bodies. However, two of the LS3 mounting holes will need to be slotted for correct fitment.
The manifold features a high-flow rear intake passage but is supplied with a maximum 90 mm throttle bore to ensure the LS1 and Starr throttle bodies seal correctly. Any throttle body larger than 90 mm will require the manifold bore to be professionally matched.
These are the only supported throttle-body options.
A throttle-body adaptor plate for the factory Holden two-bolt throttle body is available separately. However, a larger 90 mm throttle body is recommended to achieve the full performance potential of the system.
Technical Specifications
| Specification | Details |
|---|---|
| Supercharger | Whipple 2.4L Gen 4 twin-screw |
| Recommended application | Stock to mildly modified Holden 5.0L EFI engines |
| Maximum boost | Up to 10 psi, subject to the complete engine combination and tune |
| Vehicle fitment | Holden VN, VP, VR and VS; other engine conversions subject to clearance checks |
| Supplied throttle bore | Maximum 90 mm |
| Bypass system | Integrated 1.5-inch bypass |
| Manifold | CNC-machined low-profile open-plenum design |
| Cylinder-head compatibility | Holden EFI/VN-style asymmetrical-port heads |
| Drive system | Independent six-rib drive |
| Drive components | CNC billet snout, heavy-duty tensioner and billet 160 mm crank pulley |
| Fuel-rail compatibility | Integrates with the factory fuel rails and lines |
| Electronics | Remote 2-bar MAP sensor and plug-and-play extension looms |
| Intercooler | Not included; manifold is pre-machined for a future intercooler upgrade |
| Instructions | Complete step-by-step colour fitting instructions |
Supercharger Pulley Options
The kit is supplied with a supercharger pulley selected for the intended application.
Smaller and larger supercharger pulleys are available separately and are designed for quick bolt-on replacement.
Pulley size and boost pressure must be selected according to:
- Engine capacity and condition
- Compression ratio
- Camshaft and cylinder-head specification
- Fuel type and quality
- Fuel-injector and fuel-pump capacity
- Exhaust system
- Intended use
- ECU calibration
As this is a non-intercooled system, boost must be selected conservatively to control intake-air temperature and reduce the risk of detonation.
Options Sold Separately
- Complete water-to-air intercooler upgrade
- Billet intercooler core
- Triple-pass front heat exchanger
- Heavy-duty intercooler water pump
- Billet intercooler reservoir
- Smaller or larger supercharger pulleys
- Eight-rib supercharger drive upgrade
- Eight-rib upper supercharger pulley
- Factory two-bolt Holden throttle-body adaptor plate
Fuel-System and Tuning Requirements
The Stage 1 2400 kit requires:
- Larger fuel injectors
- A suitable high-flow fuel pump
- A larger throttle body is recommended
- A custom ECU tune
- Professional installation
For many non-intercooled applications, 60–70 lb/hr fuel injectors and a suitable high-flow in-tank fuel pump, such as an appropriate Walbro-series pump, may provide adequate capacity.
Injector and fuel-pump selection must be confirmed by the installer or tuner based on the engine specification, fuel type, target boost level and required horsepower. The fuel system must not be selected solely from a general recommendation.
Important Notes
- This is a non-intercooled supercharger package.
- This listing is for non-VT applications.
- Installation, fuel injectors, fuel pump, throttle body and ECU tuning are not included.
- No major internal engine modifications are generally required for a suitable stock or mildly modified engine; however, the required supporting fuel-system components and custom tune must be installed.
- Engine condition and suitability must be confirmed before installation.
- Boost pressure and power output will vary according to the complete engine combination.
- Non-intercooled applications require careful control of boost, intake-air temperature, ignition timing and fuel delivery.
- Smaller supercharger pulleys may require intercooling and further engine, fuel-system and drive-system upgrades.
- Custom engine conversions may require additional fabrication and vehicle-specific modifications.
- Professional installation and dyno tuning are strongly recommended.
