Ross Performance Nissan RB25 R33 4WD Dry Sump Kit (Non-Triggered)
Lead Time: Make Selection For Availability
Nissan RB 4WD 4 Stage Dry Sump Oil Pump System
A Ross Performance Parts Dry Sump External Oil Pump Kit providing a comprehensive solution to the inherent oil pump failures in the Nissan RB (4WD) engine with the integration of a high-performance harmonic damper.
Kit includes the following:
Nissan RB Race Series Harmonic Damper (306500, 306501, 306502, 306503 OR 306510)
Aviaid 4 Stage External Oil Pump – LH Mounting with 1 x 1.5″ Pressure and 3 x 1.75″ Suction (9950411-3845)
Aviaid Dry Sump Tank – 3 Gallon Capacity (Aviaid Oil Tank 3GAL)
Nissan RB (Twin Cam) Billet Cam Covers (Pair) (306000-14)
Nissan RB26 Dry Sump Weld in Ports (306002-15)
Nissan RB (Twin Cam) Head Drain Adaptor (306000-16) – not included for the RB30 (Australia)
Nissan RB Oil Pump Left Hand Mounting Bracket (306000-18)
Nissan RB Oil Return Adaptor (Dry Sump Conversion) (306000-25)
Nissan RB Billet Oil Pump Blanking Plate (306000-26)
Universal Dry Sump Drive Adaptor with 19T HTD Pulley (991000-19HTD)
38T HTD Oil Pump Pulley with Pulley Shields (991038)
8mm HTD Oil Pump Drive Belt – 576mm x 20mm (993576-8M-20)
Applications
Nissan Skyline R33 GTS-4 RB25DE (4WD)
Please Note
*Please check application before purchase, still unsure? email [email protected] or phone 01409231887
*To utilise this kit the air conditioning must be removed.
*This kit does not include a sump. Modification to your 4WD sump is required.
Need help choosing?
Damper Series – Choose which Tier of Ross Performance Parts Tuffbond Harmonic Damper suits your application.
Crank Trigger Profile – Choose the number of teeth for your crank trigger disc.
Sensors – Choose which style hall effect sensor you would like.
Still need more information? Email: [email protected]
Crank Pulley
Metal Jacket - Performance OEM Replacement
Designed for high performance street applications and occasional track use.
Retains all OEM accessories, belt locations and lengths.
power steering may be underdriven in some instances to improve performance at higher RPM's.
Race Series - High Performance Damping
Designed for high performance street applications and occasional track use.
For sustained Higher RPM with Underdriven alternator, water pump and power steering pulleys.
Typically air conditioner pulley is removed to allow increased damping mass.
Replaceable damper assembly for servicability.
Large diameter damping mass for increased inertia.
Gold Series - Top Tier Damping
Designed for a professional race application.
Identical pulley layout as race series.
Ultra high performance bronze alloy hub crank hub.
Crank Trigger Profile
Choosing your crank trigger profile
Firstly consult your engine tuner / builder for their preference to achieve an optimal tune.
Both 12T & 36T profiles are proven in high performance applications.
Both profiles exceed the minimum target dimensions reccomended by sensor manufacturers.
Both profiles are inegrally balanced.
All Ross Performance Parts triggers are mounted independant from the damping mass to provide clean, crisp timing data.
Hall Effect Sensors
Choosing Your Sensor
Firstly consult your engine tuner / builder for their preference to achieve an optimal tune.
Both the GT101 & Cherry sensors are the Hall Effect type.
Both sensors chare the same minimum target dimensions, reccomended target material and wiring requirements.
Typically Ross Performance Parts trigger kits are designed to suit either sensor option.
OILING SYSTEMS
An engine must be lubricated for smooth, efficient performance, and an oiling system addresses this need. There are two main types of oiling systems, a wet sump and a dry sump.
The wet sump system is typical in most production cars, with the oil sitting in an oil pan reservoir stored beneath the crankshaft. An internal oil pump, which sucks the oil through a tube from the bottom of the pan’s sump, distributing oil throughout the engine. The wet sump system provides the advantage of a simple design, however there are potential issues regarding oil control particularly in modified engines and racing applications.
The large g-forces pulled under acceleration, aggressive braking and cornering at speed:
cause the oil in the pan to gravitate away from the pumps pick-up tube, which will stave the system of oil and cause damage to the engine;
cause the oil to slosh in the pan, creating a higher probability of the crankshaft slapping into the oil as it turns, whipping the oil into an aerated froth and reducing the oiling systems ability to create pressure; and
each revolution of the crankshaft causes the parts to move rapidly through the oil and air in the pan, generating minute amounts of parasitic power loss caused by viscous drag and air drag (windage) negatively impacting horsepower
The alternative, a dry sump set-up, uses two or more oil pumps, and a separate oil reservoir. There are a minimum of two stages, one stage for pressure and at least one stage for scavenge. The pressure stage supplies oil from the bottom of the reservoir into the engine, and the scavenge stage/s remove oil out of the dry sump pan and return this oil (and air) to the reservoir, with the option for adding multiple scavenge stages to ensure maximum oil is scavenged from the engine. The reservoir (tank) controls the flow of oil, removing air bubbles, and sending the oil back to the oil pump to be routed through the engine.
In a dry sump set-up, the oil pump is usually mounted to the side of the engine, and driven by a belt off the front of the engine. It is typically lower than the reservoir, so it is gravity fed, rather than requiring a pump to suck the oil upward, as in the wet sump design, and performs more efficiently as it receives positive pressure on the suction side.
The dry sump set-up is more appropriate for a racing application, compared to the wet sump system, as it provides:
improved reliability due to consistent oil pressure;
the shallow oil pan allows the engine to be mounted lower in the chassis, effectively lowering the centre of gravity and provide flexibility to modify underfloor aerodynamics;
the option to move the oil tank within the confines of the car to improve weight distribution;
the option to increase oil capacity to be as large as you like;
less chance of engine damage as no longer susceptible to starving the engine of oil due to movement issues caused by cornering or launching forces;
protection against parasitic power loss as it keeps oil away from the crankshaft to reduce oil drag (viscous), and pulls out most the of air to reduce air drag (windage);
cooler oil due to the external storage, plus additional cooling available by utilising an oil cooler, mounted inline between the pressure outlet and the engine; and
easier maintenance, and replacement, as the pump is external to the engine.
The key documented disadvantage to a dry-sump setup is the added cost and complexity to your engine build, however, from the weekend enthusiast to the professional racer the significant advantages far out way the cost, remember no oil equals no engine!
MORE INFORMATION
RELATED PRODUCTS
Further Help?
Why not check out Ross's technical aritcles, Installation guides & FAQ's located here
Crank Pulley (Harmonic Dampener)
Triggering
The instructions on this page are guidelines only.
It is recommended that the installation of any performance part be undertaken by a qualified automotive specialist.
Keeping our installation guides up to date is an ongoing process. If any information you require is not listed or if you have a specific question please contact our team directly.
High-quality components for automotive enthusiasts
In 1981, Ross Performance Parts started producing ultra-high-quality engine components for passionate automotive enthusiasts. Since then the modified car scene has changed a lot. Cars are now faster, engines more powerful, and the demands of modern racing are greater than ever. Ross Performance Parts engine protection solutions provide the assurance that your investment is secure, letting you #GoHarder for longer.
Now a global enterprise, Ross Performance Parts is a proud Australian company. Based in regional Victoria, Ross Performance Parts designs, develops and manufactures engine protection solutions for automotive fans around the world.
To maintain their position at the cutting edge of the performance automotive industry, they are continuously innovating and developing new ways to deliver more horsepower, more reliably. Ross's harmonic dampers, trigger kits, oiling systems and engine accessories have been proven by more than three decades of race and street use.
#RossPerformanceParts #SendItWithConfidence
| Vehicle / Engine Manufacturer | Nissan |
|---|---|
| Part Type | Sumps / Baffles |
| Manufacturer | Nissan |
| Model | Skyline |
| Variant | R33 |
| Engine | RB25DET Spec 1, RB25DET Spec 2 |
| Lead Time | Make Selection For Availability |