Hellcat Supercharger Size and Specs: 2.4L vs 2.7L TVS Breakdown

The term “hellcat supercharger” covers two distinct units — the 2.4L TVS and the 2.7L TVS. They look similar at a glance, share the same mounting pattern, and both use Eaton’s twin-vortices series rotor technology. But the specs matter depending on what you’re building.

This guide breaks down the physical dimensions, airflow ratings, rotor configurations, and which version belongs in which build.

Eaton TVS Technology: What Makes the Hellcat Blower Different

Both hellcat supercharger versions use Eaton’s Twin Vortices Series (TVS) design, which means twisted four-lobe rotors rather than the older three-lobe Roots design. The twisted helical lobes create multiple compression events per rotation, which:

• Reduces noise (the characteristic hellcat whine is still there — just less harsh than older Roots blowers)
• Lowers heat of compression compared to a standard Roots design
• Improves volumetric efficiency across the RPM range

Both units are positive displacement — boost builds immediately from low RPM rather than coming on like a centrifugal blower.

2.4L TVS (Standard Hellcat)

Found in: 2015–2023 Dodge Challenger/Charger SRT Hellcat (707 hp)

Displacement: 2.38L (2,380cc) per revolution

Dimensions:

• Length: approximately 16.5 inches
• Width: approximately 11 inches
• Height: approximately 7.5 inches (not including intercooler brick)

Rotor configuration: 4+4 lobe, 60° helix angle

Factory boost pressure: 11.6 psi (Hellcat application)

Factory airflow: approximately 1,050–1,100 CFM at peak

Charge cooling: Integrated water-to-air intercooler with dedicated coolant circuit

Weight: approximately 55–60 lbs assembled

The 2.4L is the most common hellcat blower on the used market. It supports builds up to roughly 750–800 rwhp with aggressive porting and high-octane or E85 fueling. Above that, the 2.7L becomes the better choice.

2.7L TVS (Redeye / Demon Version)

Found in: 2018–2023 Hellcat Redeye (797 hp), 2018 Demon (808 hp), 2023 Super Stock

Displacement: 2.70L (2,700cc) per revolution

Dimensions:

• Length: approximately 17.5 inches
• Width: approximately 11.5 inches
• Height: approximately 7.5 inches

Rotor configuration: 4+4 lobe, 60° helix angle (same as 2.4L)

Factory boost pressure: 14.5 psi (Redeye), 14.5 psi (Demon with higher drive ratio)

Factory airflow: approximately 1,250–1,300 CFM at peak

Charge cooling: Same integrated water-to-air intercooler design, larger capacity

Weight: approximately 62–68 lbs assembled

The 2.7L is the unit to have if you’re targeting 800+ rwhp. More displacement per revolution means more airflow at the same RPM, which translates to higher power potential before you hit the rotor’s physical limits.

Key Differences at a Glance

| Spec | 2.4L TVS | 2.7L TVS |

|—|—|—|

| Displacement | 2.38L | 2.70L |

| Factory boost | ~11.6 psi | ~14.5 psi |

| Airflow (peak) | ~1,100 CFM | ~1,300 CFM |

| Power ceiling (ported) | ~800 rwhp | ~1,000+ rwhp |

| Used market price | $800–$1,400 | $1,400–$2,500 |

| Availability | Common | Less common |

Physical Fitment Differences

The 2.4L and 2.7L share the same bolt pattern, so they’re largely interchangeable in factory HEMI applications with the correct intake manifold. The 2.7L is slightly longer and taller, which can affect hood clearance in some swap applications.

For LS swaps and other non-HEMI applications using adapter plates, confirm which version your adapter is designed for — some adapter kits are spec’d specifically for the 2.4L due to its more common dimensions.

Whipple Comparison

The hellcat supercharger is often compared to Whipple’s W185 and W175 series. The Whipple units use a twin-screw design rather than Roots/TVS and generally flow more efficiently at higher boost pressures. However, Whipple kits run $3,500–$6,000 new. The hellcat blower — especially in 2.4L form — can be had used for $800–$1,400, making it significantly more cost-effective for budget-conscious builds.

For serious competition builds targeting 900+ rwhp, a Whipple or ProCharger D1SC may edge out the hellcat blower in peak power. For street-strip builds under 850 rwhp, the hellcat TVS is the better value.

Porting: How to Get More From Either Size

Regardless of which version you’re running, supercharger porting removes the factory casting restrictions and smooths airflow through the inlet, snout, and rotor housing. On the 2.4L TVS, a quality port job by FAS Motorsports adds 40–80 rwhp at the same boost level by reducing inlet restriction and heat load.

On the 2.7L, porting is especially worthwhile when you’re pushing toward the 900+ rwhp range — it unlocks the blower’s remaining airflow capacity that factory casting limits leave on the table.

See hellcat supercharger porting and rebuild services →

Which One Should You Buy?

Get the 2.4L if: You’re building to 700–750 rwhp, budget is a constraint, or you’re running an adapter plate swap where the 2.4L dimensions are better suited.

Get the 2.7L if: You’re targeting 800 rwhp and above, running a built motor with E85 or race gas, and want headroom for future mods.

Either way, buying used and having FAS Motorsports inspect and port before installation is the most cost-effective path to a reliable, high-output build.