How much HP does a supercharger add to a 5.7 RAM?

For a 5.7L RAM, a supercharger typically adds about 150–200 horsepower, with higher-boost setups potentially delivering 250–350 hp, depending on the kit, boost pressure, fuel system, and tuning.

Understanding how forced induction changes a 5.7 Hemi RAM

The 5.7 Hemi is a robust V8 that responds well to forced induction, but adding a blower changes more than just horsepower. A properly installed supercharger increases air delivery dramatically, which, paired with more fuel and a calibrated ECU, yields substantial power gains. The process also introduces more heat and torque, so cooling, fuel delivery, and drivetrain integrity become important considerations. The result can be thrilling acceleration, but it requires careful planning and ongoing maintenance to stay reliable.

Typical horsepower gains by kit and boost level

These figures reflect common ranges reported by manufacturers and tuners for 5.7 Hemi Ram blower kits. Gains are typically stated at the crank, with wheel horsepower lower due to drivetrain losses. Actual results depend on the kit, boost level, fuel system, and tuning.

• Mild/street-friendly kits (roughly 6–8 psi): commonly add about 150–200 hp at the crank (about 120–170 hp at the wheels) with a proper tune and supporting fuel system.


• Moderate-boost kits (around 8–12 psi): often yield 200–260 hp more at the crank (roughly 170–230 hp at the wheels) with upgraded injectors, fuel pump, and intercooling.


• High-boost or race-oriented kits (12+ psi): frequently push gains in the 250–350+ hp range at the crank (approximately 200–300+ hp at the wheels), but require extensive supporting work and meticulous tuning.

These figures are general expectations; real-world results vary based on engine condition, octane level, altitude, exhaust and intake configurations, and the quality of the tune.

Overall, the horsepower gain from a supercharger on a 5.7 RAM is largely driven by boost level and supporting upgrades. The more you upgrade fueling, cooling, and calibration, the closer you get to the higher end of these ranges.

Other important considerations when adding a supercharger

Beyond raw power, buyers should weigh warranty implications, emissions compliance, and long-term reliability. The following factors commonly influence the total package and driveability.

• Warranty and emissions: Aftermarket superchargers can affect factory warranties and may have different emissions implications depending on location and regulations; consult your dealer and local rules.


• Drivetrain loading: Increased torque can stress the transmission, axles, and differential; some builds require supporting upgrades or stronger components.


• Cooling and fuel strategy: An intercooler, upgraded fuel pump and injectors, and a tuned ECU are essential to prevent knock and maintain safety at higher power levels.


• Installation cost and complexity: Professional installation can be expensive, and some kits offer turnkey support with dyno tuning.


• Tuning and dyno testing: A dedicated tune ensures power is made safely and reliably across rpm ranges and avoids detonation under load.

With careful planning, a reputable installer, and a precise tune, you can maximize power gains while preserving reliability and driveability.

Summary

A supercharger can significantly increase the power of a 5.7 RAM. Typical gains range from approximately 150–200 hp for mild kits to 250–350+ hp for high-boost configurations, with wheel horsepower lower due to drivetrain losses. Final numbers depend on the specific kit, boost level, and supporting upgrades such as fuel delivery and cooling. Prospective buyers should consider cost, warranty, emissions, and proper tuning, and consult a dyno-taired shop to verify real-world results.

How much boost can a stock 5.7 hemi take?

A stock 5.7 Hemi can generally handle 6–8 psi of boost before running into issues, though some sources suggest around 8 psi is the upper limit for reliability. Going beyond this level significantly increases the risk of engine failure, especially to the stock pistons and connecting rods. For safely running higher boost pressures, especially over 10 psi, forged internal components are essential, and it's also important to upgrade the drivetrain to handle the increased power. 
This video discusses the boost limits of the 5.7L Hemi and the potential issues that can arise from exceeding them: 58sTorqueSavvyYouTube · Nov 7, 2025
For a stock 5.7 Hemi

• Recommended boost: 6–8 psi is generally considered safe for a stock bottom end. 
• Risks of exceeding this: Pushing more boost puts significant stress on the stock components and can lead to engine damage, potentially causing catastrophic failure. 
• Supporting modifications: For 6–8 psi, consider a custom tune and a wideband air-fuel ratio gauge for better performance and safety. 

For a built 5.7 Hemi

• Forged internals: To safely handle more boost, especially 10 psi or higher, you must upgrade to a forged bottom end with stronger pistons and connecting rods. 
• Higher boost levels: With forged internals, 5.7 Hemis have been pushed to 12 psi or more, as discussed in this Facebook post and shown in this YouTube video. 
• Drivetrain upgrades: The stock transmission and other drivetrain components will also need to be reinforced to handle the increased horsepower and torque. 

This video demonstrates a 5.7L Hemi engine with a turbocharger running at 10.4 psi: 30sRichard HoldenerYouTube · Aug 22, 2020

How much HP can you get out of a 5.7 Hemi?

A stock 5.7L Hemi produces between 340340340 and 420420420 horsepower, but with modifications, it can reliably handle over 500500500 wheel horsepower and potentially reach 600600600 horsepower or more, though this requires upgraded internal components like forged pistons and connecting rods for higher power goals beyond 500−550500 minus 550500−550 crank horsepower. Upgrades can include a custom tune, improved exhaust (like headers), and forced induction (turbos or superchargers) to significantly increase power. 
This video demonstrates how to get 400+ wheel horsepower from a 5.7 Hemi: 1m8020 AutomotiveYouTube · Sep 10, 2024
Stock and basic modifications

• Stock: Factory-built engines produce between 340340340 and 420420420 horsepower, depending on the specific model and year. 
• Tuning: A simple performance tune can add 10−4010 minus 4010−40 horsepower, bringing the total to roughly 400−435400 minus 435400−435 horsepower. 
• Bolt-ons: Other basic bolt-on parts, like a high-flow air intake and performance exhaust headers, can also provide gains. 

Moderate to high-performance modifications

• Forced induction: Adding a turbocharger or supercharger is an effective way to make substantial power. A turbo system with 888 psi of boost has been shown to produce nearly 600600600 hp, while a supercharger can add over 160160160 hp. 
• Internal upgrades: To handle more power, especially above 500−550500 minus 550500−550 crank horsepower, the stock internal components must be upgraded. 
  • Rotating assembly: Stock connecting rods are a weak point. Replacing them with forged rods is recommended when aiming for power levels of 500500500 wheel horsepower and above. 
  • Crankshaft: The stock cast crankshaft is good for about 650650650 hp, but for more extreme builds, a forged crankshaft is necessary. 
• High-HP builds: With a fully forged internal setup, a 5.7 Hemi can be built to handle over 100010001000 horsepower. 

This video shows how to add power to a 5.7 Hemi with supercharger: 1mMod StarzYouTube · Aug 22, 2023

How much HP does a supercharger add to a 5.7 Hemi?

A supercharger can add 120 to 160+ horsepower to a 5.7L Hemi, depending on the specific kit and boost level. For example, a ProCharger kit can add 160+ HP to a 5.7L engine with 7 psi of boost. Some performance packages can be designed for even greater gains, pushing the total output close to 600 horsepower. 
This video shows the results of a 5.7L Hemi with a supercharger: 59sCRASH N BERNYouTube · Mar 2, 2024

• Typical bolt-on kits: A gain of 120 to 160+ horsepower is common with many off-the-shelf kits, especially with 7 psi of boost. 
• Example kits: A ProCharger HO Intercooled System can provide a 160+ HP gain on a 5.7L Hemi. Magnuson Superchargers offers a kit for the same vehicle that adds about 149 hp. 
• Higher-end packages: More aggressive or custom setups, especially those combined with other modifications like a built engine, can push the total horsepower significantly higher, potentially reaching 600 hp or more. 

Can a stock 5.7 handle a supercharger?

A: Yes. Stock Gen III HEMI engines, especially the 5.7L and 6.4L, are built strong and can handle moderate boost levels with no problem—especially when using a well-engineered, intercooled system like ProCharger's.