Upgrade Your Hellcat with High Flow Aftermarket Fuel Rails

Upgrading Your Hellcat with Aftermarket Fuel Rails

The Dodge Challenger and Charger Hellcat models come equipped from the factory with a supercharged 6.2L HEMI V8 producing 707 horsepower. This engine is an absolute beast, but many Hellcat owners are hungry for even more power. One popular upgrade is switching out the stock fuel rails for an aftermarket set that can deliver more fuel to support power-adding modifications.

Why Upgrade the Hellcat Fuel Rails?

The stock Hellcat fuel rails use 5/16" lines and are made of stainless steel. They work great for a stock engine, but start to become a restriction once you begin modifying the engine for more power. Installing larger aftermarket fuel rails with 3/8" or 1/2" lines allows more fuel delivery to the engine, supporting modifications like:

• A larger supercharger pulley for increased boost
• Upgraded supercharger internals
• Higher flow fuel injectors
• Heads and cam upgrade for more airflow
• More aggressive tune

With the right supporting mods and tune, upgraded fuel rails can enable the Hellcat engine to safely produce over 1,000 horsepower! The extra fuel flow gives you room to push things further.

Top Aftermarket Options

Here are some of the most popular fuel rail upgrades for the Hellcat:

AFE Power 3/8" Fuel Rails

AFE Power's fuel rail kit features CNC machined 6061 aluminum rails with -8 AN inlet/outlet fittings and capable of supporting over 1,000 horsepower. The 3/8" rails flow 40% more than stock and come with all necessary hardware for installation.

Aeromotive Stealth Fuel Rails

Aeromotive's Stealth rails have a stealthy all-black finish and are made of 6061 aluminum. With 1/2" ports throughout, they offer the highest flow capability. The kit includes rails, regulator, and feeding each bank's injectors from both sides.

Fore Innovations Modular Fuel Rails

The Fore Innovations modular rail system features 1/2" ports and interchangeable fuel rail inserts allowing you to run different size injectors. The modular design makes it easy to service the rails and change injectors. Hardened steel construction ensures durability.

Supporting Mods

When upgrading to higher flowing fuel rails, you'll also need to address supporting mods to take full advantage of the extra fuel flow capacity:

• Fuel injectors - Higher flow injectors (1,500cc+) matched to rail flow capacity
• Fuel pump(s) - Dual pump setup recommended for 1,000+ HP builds
• Fuel lines - Upgrade to -8 or -10 AN lines
• Fuel pressure regulator - Adjustable regulator to control fuel pressures

With these properly matched components, you'll be feeding your beast plenty of fresh high octane fuel for massive power potential.

Tuning is Key

As with any major power modification on a late model car, professional tuning is highly recommended to ensure optimal performance and safety. The right tuner will optimize the fuel maps, timing, boost levels, and all parameters to maximize the output of upgraded fuel system components.

Safety Considerations

Fuel systems operate under high pressure, so proper installation and precautions are a must whenever modifying your Hellcat fuel supply:

• Allow installation to be done by experienced mechanics
• Ensure all fuel system components are properly rated for power levels
• Carefully check for any leaks before starting the car
• Have the vehicle tuned promptly after hardware installation
• Only run approved high octane fuel recommended by your tuner

Follow these best practices and your Hellcat will be feeding happily on its new high flow diet in no time. Just be sure to only use the added power where it's legal!

FAQs

What size aftermarket fuel rails should I get?

Most opt for 3/8" or 1/2" fuel rails to maximize flow over the stock 5/16" rails. 1/2" rails offer the most potential for 1000+ HP builds.

Do I need to upgrade my fuel pumps too?

Yes, you'll want dual fuel pumps capable of supplying enough volume for your power goals. Stock pumps will be maxed out.

How much horsepower can upgraded rails support?

With the right supporting fuel system mods, a good quality set of 3/8" or 1/2" rails can support 1000+ HP in a Hellcat engine.

Will I need a custom tune?

Absolutely. Proper tuning is required to optimize the air/fuel ratios and take advantage of the extra fuel flow.

Is there any advantage to dual rail setups?

Dual or split rail kits feed each bank separately for more stable fuel delivery at high power levels.