FiTech Ultimate Rebel LS EFI: Cost & Features

Electronic Fuel Injection (EFI) systems have revolutionised the hot-rodding industry, offering significant advantages over traditional carburettors. The days of complex fuel and spark curve programming are largely behind us, thanks to the widespread adoption of self-learning ECUs. As the market has expanded, so has the availability of choices, often making it difficult to discern between brands beyond price and aesthetics. For those undertaking a Gen III LS V-8 (LS1, LS2, LS6) engine swap, the decision-making process for a bolt-on, self-learning EFI system can be daunting. This is where FiTech’s new Ultimate Rebel LS EFI systems for cathedral-port Gen III V-8s come into play, offering a streamlined and user-friendly solution.

Understanding the FiTech Ultimate Rebel LS EFI System

FiTech's Ultimate Rebel LS EFI systems are designed to simplify the process of upgrading your LS engine. These systems are available in three distinct horsepower ratings: 500, 750, and 1,000 horsepower. Each system features a self-learning ECU, which automates much of the tuning process, making it accessible even for those new to EFI. Many kits are also offered with a complete fuel system, providing the option of an in-tank or external inline electric fuel pump. Furthermore, FiTech extends the versatility of the Rebel LS line by offering systems with integrated automatic transmission controllers and modern LS3-style coil packs, allowing for a more comprehensive and integrated upgrade.

The Ultimate Rebel LS builds upon the success of FiTech's earlier Ultimate LS systems. The key differentiator for the "Rebel" version lies in its more streamlined appearance and a newly incorporated fuel rail bracket. This revised bracket design enhances compatibility, making the Ultimate Rebel LS a better fit for a wider range of vehicles compared to previous FiTech manifold designs.

Pricing and Configuration Options

The FiTech Ultimate Rebel LS system boasts an impressive array of customisation options, with currently over 91 available configurations, and more expected to be released. This allows you to tailor the system precisely to your needs. You can choose to include or exclude optional components such as:

• A FiTech Go Shift GM transmission controller for seamless automatic gear changes.
• LS3-style coil packs for a cleaner and more efficient ignition system.
• A comprehensive Go Fuel system, with choices for in-tank, external sump, or inline fuel pumps. You can also opt out if you prefer to use your own fuel system.
• An LCD digital dash display for real-time monitoring of engine parameters.
• A choice between a 92mm throttle body (suitable for up to 500 hp) or a larger 102mm throttle body (for 750 and 1,000 hp applications).

The streamlined FiTech Ultimate Rebel LS intake manifold is also available as a stand-alone kit for those who may only require the manifold and associated components. This stand-alone manifold kit is priced at $995. FiTech has indicated that further combinations and options will be made available in the future.

The pricing for complete FiTech Ultimate Rebel LS systems starts at approximately $2,026.99. This entry-level price point typically covers a 500 hp rated system with 36 lb/hr injectors, a 92mm throttle body, a 600 hp Go Fuel in-tank fuel pump module, and excludes options like coil packs, transmission controllers, and the LCD digital dash display. For a fully-featured top-tier system, such as a 1,000 hp configuration with 80 lb/hr injectors, a 102mm throttle body, a 1,000 hp Go Fuel in-tank fuel pump module, LS3-compatible coil packs, a transmission controller, and an LCD digital dash display, the price can reach up to approximately $3,220.99.

FiTech Go Fuel System Options Explained

FiTech has established a strong reputation for its comprehensive 'Go Fuel' line of stand-alone EFI fuel systems. The Ultimate Rebel LS kits can be seamlessly integrated with these Go Fuel setups, or you can choose to omit the fuel system if you have your own preferred components. Given the extensive range of kit part numbers, it is crucial to carefully review the product descriptions to confirm whether a fuel system is included in your selected kit.

Your choices for FiTech fuel systems are extensive, contributing to the large number of SKUs within the Ultimate Rebel LS line. These options include:

• In-tank kits: Available in 600 hp and 1,000 hp ratings, these are designed for clean and efficient fuel delivery directly from the tank.
• Force Fuel sump systems: These systems offer flexibility with pump capacities of 255 lph, 340 lph, and a high-flow 860 lph option for demanding applications.
• Inline fuel pump master kits: A robust solution for those who prefer an external pump setup.

What's Included and What's Optional?

FiTech has meticulously curated its Ultimate Rebel LS EFI kits to cater to nearly every requirement a do-it-yourself (DIY) engine builder might have when performing an LS1/2/6 swap. A significant advantage is the ability for shoppers to opt out of hardware components they may already possess, thereby avoiding unnecessary duplication and cost. Regardless of the specific configuration chosen, every FiTech Ultimate Rebel LS kit comes with the following core components:

• A heavy-gauge, fabricated aluminium intake manifold that is boost-rated to an impressive 27 psi.
• A throttle body, available in either 92mm (for 500 hp) or 102mm (for 750 and 1,000 hp) with integrated MAP, IAT, and TPS sensors for accurate engine management.
• High-flow fuel injectors, precisely matched to the system's horsepower rating.
• A complete fuel rail kit, including newly redesigned fuel rail brackets for improved fitment.
• A self-learning ECU paired with a user-friendly handheld controller for easy operation and tuning.
• A three-bar MAP sensor, essential for managing forced induction applications (turbocharged or supercharged engines).
• An oxygen sensor and a clamp-on bung kit for accurate air-fuel ratio monitoring.
• A comprehensive wiring harness, ensuring all components are correctly connected.
• All necessary brackets and hardware for a complete installation.

The Ultimate Rebel LS EFI Systems are compatible with Chevy LS1, LS3, and LS6 engines, specifically those equipped with either a 24x or 58x crank reluctor wheel and cathedral port cylinder heads. This broad compatibility ensures a wide range of LS enthusiasts can benefit from this advanced EFI solution.

Upcoming Developments: Rec-Port LS and Short-Runners

For enthusiasts with later model LS engines featuring rectangle-port cylinder heads, FiTech has announced that Ultimate Rebel LS EFI kits will soon be available in configurations specifically designed for these heads. Additionally, all Ultimate Rebel LS intake manifolds will be offered with both satin and polished finishes to complement various engine bay aesthetics. Short runner versions of the intake manifold and drive-by-wire throttle body options are also on the horizon.

As of the time of this writing, these new options might not be immediately searchable on the FiTech website. For the most up-to-date information and to place orders for these forthcoming configurations, it is recommended to contact FiTech’s customer service line directly at 951-340-2624, selecting option 2.

Frequently Asked Questions (FAQ)

Q1: What is the base price for a FiTech Ultimate Rebel LS EFI system?

A1: Complete FiTech Ultimate Rebel LS systems start at approximately $2,026.99 for a 500 hp configuration without optional extras like coil packs or a transmission controller.

Q2: Can I buy the FiTech Ultimate Rebel LS intake manifold separately?

A2: Yes, the streamlined FiTech Ultimate Rebel LS intake manifold is available as a stand-alone kit. The kit including the throttle body, injectors, sensors, and fuel rail kit costs around $995. A simpler kit with just the manifold and fuel rail kit is available for approximately $549.

Q3: Are these systems compatible with forced induction?

A3: Yes, the FiTech Ultimate Rebel LS EFI systems include a three-bar MAP sensor, making them suitable for applications with forced induction (supercharging or turbocharging), with the manifold itself being boost-rated to 27 psi.

Q4: What horsepower ratings are available?

A4: The Ultimate Rebel LS EFI systems are available in 500 hp, 750 hp, and 1,000 hp ratings.

Q5: Will there be versions for rectangle-port LS heads?

A5: FiTech has announced that rectangle-port versions of the Ultimate Rebel LS EFI kits will be available soon.

Q6: What distinguishes the "Rebel" LS system from other FiTech LS systems?

A6: The "Rebel" version features a more streamlined appearance and an updated fuel rail bracket for improved fitment in certain vehicles compared to previous FiTech LS manifolds.

Q7: What is the purpose of the self-learning ECU?

A7: The self-learning ECU simplifies tuning by automatically adjusting fuel delivery and ignition timing based on real-time engine data, making the system user-friendly for a wide range of tuners.

Q8: Can I choose different fuel pump options?

A8: Yes, FiTech offers various Go Fuel system options, including in-tank pumps (600 hp and 1,000 hp), Force Fuel sump systems (255, 340, and 860 lph), and inline fuel pump master kits. You can also opt out if you have your own fuel system.