29/01/2023
For enthusiasts of classic muscle cars, street rods, and restored vintage vehicles, the allure of their original aesthetics often clashes with the desire for modern drivability and performance. Traditional carburettors, while historically significant, can often be temperamental, challenging to tune, and less efficient than contemporary fuel delivery systems. This is where advanced solutions like the FAST EZ-EFI fuel system come into play, offering a compelling bridge between old-school charm and new-age technology. When paired with the visually striking and performance-enhancing stack intake systems, these components transform your classic into a beast that's as reliable as it is powerful, all while retaining that iconic look.
The FAST EZ-EFI Fuel System: Modernising Your Classic Ride
The FAST EZ-EFI 2.0 self-tuning eight stack induction system represents a significant leap forward for anyone looking to upgrade their classic vehicle's fuel delivery without the complexities typically associated with electronic fuel injection (EFI) conversions. Designed as a comprehensive kit, this system simplifies the transition from carburetion to EFI, delivering a host of benefits that dramatically improve the driving experience.
At its core, the EZ-EFI system is engineered for ease of use. Its key feature is its self-tuning capability. Unlike traditional EFI systems that often require complex laptop tuning or dyno sessions, the EZ-EFI 2.0 learns and adapts to your engine's specific needs as you drive. This means less time spent tinkering and more time enjoying the open road. From the moment you crank the engine, you'll notice improved cold starts, smoother idling, and far superior drivability across all RPM ranges. No more pumping the throttle on cold mornings or struggling with inconsistent performance in varying weather conditions. It brings the 'set it and forget it' convenience of modern vehicles to your cherished classic.
To support this advanced system, a robust fuel delivery setup is essential. The EZ-EFI requires an EFI-capable fuel system that can consistently provide at least 40 psi of fuel pressure. This typically means upgrading your fuel pump, fuel lines, and potentially your fuel tank to ensure a steady and reliable supply of fuel to the injectors. While this might seem like an additional step, it's a fundamental requirement for any high-performance EFI system and ensures the longevity and optimal performance of your investment.
The system is also incredibly scalable. While it provides excellent performance out of the box, for those chasing serious power figures, the EZ-EFI 2.0 can support up to 1000 hp with a larger fuel injector swap. This flexibility makes it an ideal choice for a wide range of applications, from street cruisers to high-performance track machines. It's not just about getting rid of the carburettor; it's about unlocking the true potential of your engine with precise fuel metering and optimal air-fuel ratios.
The Unmistakable Appeal of Stack Intake Systems
Beyond the technical prowess of the EZ-EFI system, there's an aesthetic element that captivates many enthusiasts: the stack intake. Often associated with vintage race cars and hot rods, the exposed trumpet-like intakes protruding from the engine bay offer an undeniable visual impact. As the saying goes, "There is simply no beating the look of stack injection!" This classic appearance, combined with modern EFI technology, creates a perfect fusion of heritage and performance.
But stack intakes are not just about looks; they deliver tangible performance benefits. These intake systems are engineered to improve throttle response, enhance low-end torque, and boost high-speed power. By providing a direct and unobstructed path for air into each cylinder, they optimise airflow dynamics, leading to more efficient combustion and greater horsepower. The design inherently promotes better cylinder-to-cylinder distribution, which is often a challenge with single-plane or dual-plane carburettor manifolds.
For owners of Big Block Chevy engines, the good news is that these high-performance stack intakes are readily available. They are designed to fit both 9.800in and 10.200in deck height big-block Chevy engines, provided they are ordered with the correct valley cover. This ensures a precise fit and optimal performance for these iconic powerplants, allowing Big Block enthusiasts to enjoy the aesthetic and performance advantages of stack injection without extensive custom fabrication.
Deconstructing the Velocity Stack: Form Meets Function
Integral to the stack intake system are components known as velocity stacks, also frequently referred to as intake trumpets or ram tubes. These precision-engineered components are typically fitted to Individual Throttle Bodies (ITBs), which are a hallmark of high-performance intake systems, providing a dedicated throttle body for each cylinder.
The primary function of a velocity stack is to smooth out the airflow as it enters the intake tract. Air, by its nature, can be turbulent, especially when entering a restricted opening. A velocity stack features a carefully curved, bell-mouthed opening that guides the air smoothly and efficiently into the throttle body. This reduction in turbulence minimises air resistance, allowing a greater volume of air to flow into the engine.
However, their impact extends far beyond just smoothing airflow. When the correct length of a velocity stack is calculated and applied, it can significantly improve the engine's Volumetric Efficiency (VE). Volumetric efficiency refers to how effectively an engine can fill its cylinders with air (and fuel) during the intake stroke. A well-designed velocity stack uses resonant wave tuning, essentially acting like a megaphone for air. As the intake valve closes, the incoming air column rebounds, creating a positive pressure wave. If the velocity stack's length is precisely tuned to the engine's RPM range, this positive pressure wave arrives back at the intake valve just as it opens for the next cycle, effectively 'ramming' more air into the cylinder. This supercharging effect, without forced induction, allows for a greater mass of air to enter the cylinder, leading to a more potent combustion event and, ultimately, more power. This principle is why you'll often see varying lengths of velocity stacks used in different applications, optimised for specific RPM bands where peak power or torque is desired.
The visual appeal of velocity stacks is undeniable, particularly when adorned on muscle cars, race cars, and hot rods. Their exposed, polished, or coloured trumpets add a raw, performance-oriented aesthetic that immediately signals serious power. Companies like EFI Hardware in Melbourne, Australia, are renowned for providing high-quality ram tubes, velocity stacks, and trumpets, both off-the-shelf and custom-made, catering to the global demand for these high-performance components.
The Perfect Marriage: EZ-EFI and Stack Intakes
Combining the FAST EZ-EFI 2.0 system with a stack intake creates a truly formidable package for any classic vehicle. The self-tuning capabilities of the EZ-EFI ensure that your engine receives the optimal fuel mixture for the increased airflow provided by the velocity stacks. This synergy means you're not just getting more air into the engine; you're also getting the precise amount of fuel needed to maximise the benefits of that airflow. The result is a highly efficient, powerful, and remarkably drivable engine that retains the iconic look of a classic race machine.
This combination offers the best of both worlds: the reliability, efficiency, and cold-start performance of modern EFI, coupled with the raw power potential and stunning visual appeal of traditional stack injection. It's an upgrade that addresses both the practical needs of a daily driver and the passionate desires of a performance enthusiast.
Installation Considerations and Fuel System Requirements
While the EZ-EFI system is designed for ease of installation, it's crucial to understand the foundational requirements. As mentioned, an EFI-capable fuel system delivering at least 40 psi is non-negotiable. This means upgrading from a low-pressure carburettor fuel system. This typically involves:
- High-Pressure Fuel Pump: An in-tank or external electric pump capable of supplying the required pressure and volume.
- Larger Fuel Lines: To handle the increased flow and pressure, often -6AN or -8AN lines are recommended.
- Fuel Pressure Regulator: To maintain consistent pressure at the fuel rail.
- Return Line: EFI systems typically require a return line to send unused fuel back to the tank, which helps regulate pressure and cool the fuel.
- EFI-Compatible Fuel Tank/Sump: To prevent fuel starvation during hard cornering or acceleration, especially if using an in-tank pump.
For stack intakes, precise fitment is key. For Big Block Chevy engines, verifying the deck height (9.800in or 10.200in) and ordering the correct valley cover is paramount for a seamless installation. While experienced DIY mechanics can tackle these installations, professional assistance is always recommended to ensure proper setup and maximise performance, especially for the fuel system aspects.
Comparative Overview: Carburettor vs. EZ-EFI
| Feature | Traditional Carburettor | FAST EZ-EFI 2.0 System |
|---|---|---|
| Cold Starts | Often challenging, requires choke/pumping | Effortless, turn-key operation |
| Drivability | Can be inconsistent, sensitive to weather/altitude | Smooth, consistent, adapts to conditions |
| Fuel Efficiency | Generally lower, less precise fuel metering | Improved, precise fuel delivery |
| Tuning | Manual adjustments (jets, air bleeds) | Self-tuning, 'learns' as you drive |
| Power Potential | Good, but often limited by consistent fuel delivery | High, up to 1000 hp with injector swap |
| Maintenance | Requires regular cleaning, rebuilds | Less frequent, more reliable |
| Aesthetics (with stacks) | Requires EFI conversion kit for stacks | Integrates seamlessly with stack induction |
Frequently Asked Questions (FAQs)
Q: Do I need a new fuel tank for the FAST EZ-EFI system?
A: While not always strictly necessary to replace the entire tank, you will definitely need an EFI-capable fuel system. This typically involves an in-tank or external high-pressure fuel pump, a return line, and potentially a sump or baffle kit for your existing tank to prevent fuel starvation under dynamic driving conditions. Many aftermarket tanks are available with integrated EFI pump modules for a cleaner installation.
Q: How difficult is it to install the EZ-EFI 2.0 system?
A: The EZ-EFI 2.0 is designed to be user-friendly for a DIY installation, especially compared to other EFI systems. Its self-tuning feature greatly simplifies the setup process. However, a good understanding of automotive electrical systems, fuel systems, and basic engine mechanics is essential. The most challenging aspect for many is upgrading the fuel system to meet the 40 psi requirement and adding a return line. If you're unsure, professional installation is always recommended.
Q: What are the main advantages of EZ-EFI over a traditional carburettor?
A: The primary advantages include vastly improved cold starts, consistent drivability in all weather and altitude conditions, better fuel economy, increased horsepower potential due to precise air/fuel ratio control, and reduced maintenance. The self-tuning aspect eliminates the need for manual jet changes or tuning adjustments that carburettors often require.
Q: Will a stack intake fit my specific Big Block Chevy engine?
A: Stack intakes are available for Big Block Chevy engines, designed to fit both 9.800in and 10.200in deck heights. It is crucial to verify your engine's deck height and order the corresponding stack intake system with the correct valley cover to ensure proper fitment and performance. Always check the manufacturer's specifications for compatibility.
Q: Can I use my existing ignition system with EZ-EFI?
A: The EZ-EFI 2.0 system can work with most existing ignition systems, but for optimal performance and control, an EFI-compatible ignition setup is often recommended. This allows the EFI system to control ignition timing, further enhancing performance and efficiency. Consult the FAST EZ-EFI manual for specific ignition compatibility and recommendations.
Conclusion
The FAST EZ-EFI 2.0 self-tuning system, particularly when combined with the visually stunning and performance-boosting stack induction, offers an unparalleled upgrade for classic car enthusiasts. It eliminates the traditional headaches associated with carburettors, delivering modern reliability, efficiency, and power, all while preserving or even enhancing the iconic aesthetic of your vehicle. Whether you're cruising the streets or tearing up the track, this combination provides a driving experience that is both exhilarating and effortless, truly bringing your classic into the 21st century without sacrificing its soul. It's a testament to how intelligent engineering can bridge the gap between automotive heritage and cutting-edge performance.
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