Fuel Rail Kit
Fuel Rail Kit
To Fit Nissan s14, s15, Silvia, 200sx (SR20)
100% Made in Australia
100% Engineered in Australia
What Is It?
The ALPHA OMEGA Fuel Rail Kit "FRK" will allow you to install Bosch (Injector Dynamics) 1000cc or 2000cc top feed fuel injectors into your Nissan Silvia/200sx s14 or s15, using your standard OEM intake manifold. No intake manifold spacers required.
Why Do I Need It?
You want more fuel - either to future proof or you're already at the limit of your current injectors, without sacrificing the quality of your fuel delivery.
The below table shows the recommended power limit on a good & safe tune of various high quality, multi-pintle, good control and good spray pattern fuel injectors currently available for the SR20DET. Shown are 98 octane pump petrol and E85 ethanol fuel.
|Size (Brand)||Recommended Power Limit (rear wheel kilowatts)|
|98 Octane Pump||E85 Ethanol|
|550cc (NISMO, Tomei, HKS)||220||190|
|740cc (NISMO, Tomei, HKS)||280||230|
|1000cc (Bosch / Injector Dynamics)||360||260|
|2000cc (Bosch / Injector Dynamics)||750||520|
Note: Up to 20% more power is possible depending on supporting modifications but is not recommended.
Note: Different sizes/brands of injectors have different characteristics using different fuels, and the size/power ratio is not linear.
Why Use Bosch (Injector Dynamics) Injectors?
Most aftermarket injectors for the SR20 are made by JECS (NISMO, Tomei, HKS) or Denso (Sard) and as their capacity increases the quality of the spray pattern decreases. The highest acceptable spray pattern by JECS is 740cc (which is probably why NISMO/Tomei/HKS sell them under their own name) although there are various "high flow" JECS injectors sold under various other brands (not NISMO/Tomei/HKS) in the region of 1000cc - 1200cc. We have obtained and done our testing on these high flow JECS injectors and unfortunately their spray pattern does not meet our standards.
If those were good then we wouldn't have spent our time in developing this product.
The Bosch (Injector Dynamics) injectors; we've poured over the technical data, examined them on the flow bench, done our own testing, and put them in action - they're great! They are also high impedance injectors which are perfect for the SR20. Bosch makes the injectors as used by Injector Dynamics, and Bosch is one of the highest quality manufacturers today - these injectors are no exception.
It is widely known that Bosch (Injector Dynamics) injectors have superior control, atomisation and spray pattern and is currently the world's best injectors, hands down, no questions asked, so that's why we use and carry them.
Overview of The Fuel Rail Kit - "FRK"
ALPHA OMEGA's FRK is completely CNC machined out of solid billet alloy and includes a set of flow matched injectors. We make two different FRKs; FRK1000 with 1000cc injectors, and FRK2000 with 2000cc injectors. The FRK is designed to suit the standard OEM intake manifold and NOT use any spacers.
Originally designed by Unigroup Engineering, ALPHA OMEGA has made a number of improvements to give you the "FRK". The FRK can be configured for OEM style single entry / single feed, or dual entry / dual feed (central return). You can choose to use braided lines or regular fuel lines and an assortment of fittings from -AN to barb. You can even pick the size of the lines and fittings.
At this level of modifications we recommend using an aftermarket fuel pressure regulator with an upgraded diaphragm, which is why we did not adapt the OEM fuel pressure regulator.
Features & Benefits:
- 100% CNC machined billet alloy construction to ensure accuracy, strength and safety
- Flexibility and choice:
- Your choice of single entry / single feed, or dual entry / dual feed (with central return)
- Your choice of line size and style (-AN style, pushlock, barb fittings, etc)
- Your choice of normal braided, Teflon or regular fuel lines
- NO intake manifold spacer is used to ensure:
- No change in intake runner length
- No sharp angles, corners or flat internal surfaces
- Perfect airflow
- Easier installation
- 1 x CNC machined billet alloy fuel rail
- 3 x CNC machined billet alloy stands
- 4 x CNC machined billet alloy injector bosses
- 4 x Flow matched injectors
- 4 x Injector plugs (Injector side)
- 4 x Injector plugs (Wiring harness side) - No need to cut your old plugs off
- 4 x Special individual fuel injector filters
- 8 x Viton o-rings
- 4 x Large Nitrile Butadiene o-rings
- 4 x Small Nitrile Butadiene o-rings
- Male tail, plug and hose
- Various nuts and bolts and washers
- Full installation instructions
Note: Not all parts included in the kit are shown in the above pic.
What's Needed For a Full Install?
- Aftermarket universal fuel pressure regulator
- Lines and fittings