Dodge Demon 170 Supercharged Charger: What the "Sawped" Build Actually Means

The phrase "Demon 170 sawped Charger" shows up in forums, classified ads, and build threads — and it's worth unpacking carefully, because it combines two very specific things: a purpose-built factory drag machine and a popular engine swap concept. Understanding what each part means, how they interact, and what's involved mechanically tells you a lot about what you're actually looking at.

What "Sawped" Means in the Automotive World

"Sawped" is a phonetic spelling of "swapped" — as in an engine swap. A sawped (swapped) build means the original engine has been removed and replaced with a different one, often a more powerful or more desirable unit. Engine swaps range from simple same-family upgrades to full custom fabrication jobs involving new mounts, wiring harnesses, cooling systems, and drivetrain components.

When someone describes a sawped Charger, they're saying a Dodge Charger — usually an older generation — has had its factory engine pulled and replaced. The specific question here is what it means when that swap involves the Demon 170 powerplant.

What Is the Demon 170?

The Dodge Challenger SRT Demon 170 was introduced as a 2023 model and is widely regarded as one of the most extreme factory-produced drag cars ever offered for public sale. It's built around the supercharged 6.2-liter HEMI V8, tuned specifically for E85 ethanol fuel, where it produces a manufacturer-claimed 1,025 horsepower and 945 lb-ft of torque — figures that are extraordinary even by performance car standards on E85.

Key mechanical facts about the Demon 170's powertrain:

This engine is paired with heavy-duty internal components — reinforced connecting rods, upgraded pistons, a high-flow supercharger — all designed to handle sustained drag strip loads.

What a Demon 170 Swap Into a Charger Involves 🔧

The Dodge Charger and Challenger share the same LX/LC platform, which is one reason this swap attracts attention. The basic architecture — engine bay dimensions, subframe mounting points, transmission tunnel — is closely related. That doesn't make the swap simple, but it does make it more feasible than trying to drop this engine into an unrelated platform.

A Demon 170 engine swap into a Charger typically requires addressing several systems:

Engine and Transmission

• The 8HP90 transmission that mates to the Demon 170 is physically different from units used in base or even standard HEMI Chargers. The swap usually includes the matching transmission, not just the engine.
• Engine mount compatibility varies by Charger generation and trim.

Fuel System

• The Demon 170's power output on E85 depends on a high-volume fuel delivery system. A straight swap into a Charger requires upgrading fuel lines, injectors, and pump capacity to support ethanol volumes.
• Running the engine on regular pump gas without recalibration significantly reduces output and can cause reliability problems.

Electronics and ECU

• The Demon 170 uses a purpose-built PCM (powertrain control module) with calibration tied to its specific hardware. Integrating this into a different chassis requires either transplanting the full wiring harness or significant custom work.
• Modern HEMI electronics interact with stability control, ABS, and transmission shift logic — all of which need to function correctly post-swap.

Cooling and Exhaust

• The supercharged 6.2L generates substantial heat. Adequate cooling — radiator capacity, intercooler routing, heat exchanger placement — is a significant part of a proper build.
• Exhaust routing in a Charger may require custom headers or mid-pipe fabrication depending on the donor car.

Variables That Shape How These Builds Turn Out

No two swapped builds are identical, and outcomes depend heavily on several factors:

• Donor Charger generation: A 2006–2010 Charger presents different challenges than a 2015–2023 model, even though they share platform DNA.
• Builder experience and shop capability: This is not a weekend garage project. Full swap builds on this level typically involve experienced fabricators with dyno access.
• Parts sourcing: Whether the engine comes from a salvage Demon 170 or is a crate engine variant changes cost, documentation, and parts availability significantly.
• Intended use: Street-only builds have different requirements (emissions compliance, registration legality, safety inspections) than dedicated track cars.
• State regulations: Many states require emissions inspections, and a modified engine — especially one running E85 — may or may not pass depending on local standards. Some states exempt vehicles over a certain age from emissions testing; others don't. ⚠️

The Street-Legal Question

This is where the spectrum gets wide. A Demon 170-swapped Charger on a closed track operates under very different rules than one registered and driven on public roads. Engine swaps can trigger:

• Failed emissions inspections if the replacement engine doesn't match the VIN's certified configuration
• Insurance complications, since major undisclosed modifications can affect coverage validity
• Title and registration questions in states that require documentation of major mechanical changes

Whether a specific swap is street-legal in a specific state depends entirely on that state's emissions laws, inspection requirements, and modification rules — none of which are uniform across the country.

The mechanical concept is straightforward in principle. What differs — sometimes dramatically — is the regulatory environment you're operating in, the generation of Charger involved, and the quality and completeness of the build itself.