The DeLorean DMC-12 is an icon, but its original performance was famously underwhelming. A turbo Honda engine solves the DeLorean’s biggest problem by injecting modern, reliable power into that timeless stainless steel body. For decades, owners have wrestled with the underpowered PRV V6. Swapping in a turbocharged engine from Honda isn’t just an upgrade—it’s a complete reimagining of the car’s potential, blending 80s style with 21st-century speed.
This swap addresses the core issue head-on. You get a lightweight, robust powerplant that’s easy to tune and find parts for. It changes the entire driving experience, making the DeLorean the sports car it was always meant to be.
SOLVED: A Turbo Honda Engine Solves the DeLorean’s Biggest Problem
Let’s be honest: the stock DeLorean is slow. Its Peugeot-Renault-Volvo (PRV) 2.85L V6 produces only about 130 horsepower. For a car that looks like it should fly, it often feels grounded. The engine was the car’s achilles heel from day one, leading to lackluster acceleration and a top speed that doesn’t match its spaceship looks.
A turbo Honda engine, particularly the legendary K-series or even the B-series, fixes this perfectly. These engines are engineering marvels—compact, incredibly strong, and respond brilliantly to forced induction. By making this swap, you’re not just adding power; you’re adding a huge dose of reliability and tunability that the PRV could never offer.
Why the Original PRV V6 Was the Problem
The PRV engine was a compromise. Designed as a joint venture for heavier, front-wheel-drive sedans, it was never an ideal fit for a lightweight, rear-wheel-drive sports car. It’s heavy for its size and output, and its design makes significant power gains difficult and expensive.
- Low Power Output: 130 hp couldn’t compete even in the 1980s.
- Weight: The iron-block V6 sits over the rear axle, affecting handling.
- Parts Scarcity: Finding performance parts or even certain OEM components is a challenge.
- Cooling Issues: The rear-mounted setup was prone to overheating under stress.
The Honda Engine Advantage: More Than Just Power
Honda’s four-cylinder engines are the opposite of the PRV in almost every way. They are light, high-revving, and have a massive aftermarket support network. When you add a turbocharger, you unlock potential that perfectly suits the DeLorean’s character.
- Lightweight: An aluminum-block Honda engine can save over 100 pounds from the rear of the car, improving balance.
- Strength: Honda engines, like the K20A2 or K24, have strong internal components that reliably handle boosted power.
- Tunability: With widely available ECU solutions, you can dial in the perfect power curve.
- Availability: Engines and parts are plentiful and relatively affordable.
Choosing the Right Honda Engine for Your DeLorean
Not every Honda engine is created equal. Your choice depends on your budget, power goals, and mechanical skill. The K-series is generally the top recommendation for a modern swap.
- K-Series (K20/K24): The gold standard. Modern, fuel-efficient, and can produce 300-400+ hp with a turbo. They have a great torque curve for street driving.
- B-Series (B18C): A classic VTEC engine. Slightly older but still a fantastic, proven swap candidate with tons of turbo kits available.
- F-Series (F20C/F22C): From the Honda S2000. Incredible high-revving nature, but can be more expensive and complex to wire.
The Core Components of the Swap
This isn’t a drop-in procedure. It requires planning, custom fabrication, and a suite of new components to make everything work together. Here’s a breakdown of what you’ll need beyond the engine itself.
1. Engine Mounts and Adapters
The Honda engine won’t bolt to the DeLorean’s subframe. You’ll need custom engine mounts. Many specialist companies now offer mount kits for this specific swap, which is a huge time-saver. You’ll also need an adapter plate to mate the Honda engine to the DeLorean’s original manual transaxle, or you can opt to swap the entire transmission.
2. Wiring and ECU
This is often the most intimidating part. You’ll be removing the DeLorean’s entire engine wiring harness and replacing it with the Honda’s. Using the Honda ECU (often re-flashed for the turbo setup) is the best way to ensure the engine runs correctly. While complex, detailed wiring guides exist for popular engine choices.
3. Cooling System Rework
The DeLorean’s rear-mounted radiator needs to be up to the task. A larger, more efficient aluminum radiator is a must. You’ll also need to plumb new lines for the turbocharger’s intercooler, which is crucial for keeping intake temperatures low and power high.
4. Exhaust and Turbo Manifold
A custom turbo manifold must be fabricated to route exhaust gasses from the Honda engine to the turbo, and then a new downpipe and exhaust system to exit at the DeLorean’s distinctive rear grille. This requires skilled welding.
5. Fuel System Upgrades
The stock fuel pump and injectors won’t support a turbo Honda’s thirst. Plan for a high-flow fuel pump, larger injectors, and a adjustable fuel pressure regulator to deliver the necessary volume of fuel under boost.
A Step-by-Step Overview of the Swap Process
While every swap is unique, here is a generalized roadmap of the project. It’s a major undertaking, but breaking it down into steps makes it manageable.
- Preparation and Sourcing: Acquire your donor engine and turbo kit. Gather all necessary conversion parts (mounts, adapters, wiring supplies) before you start tearing your car apart. Create a detailed budget and timeline—then double it.
- Engine Removal: Carefully remove the original PRV V6, transmission, and all associated components. Label every wire and hose you disconnect. This is also a perfect time to clean and inspect the engine bay.
- Test Fit and Mounting: Mock up the Honda engine in the bay with the new mounts. This step ensures everything clears the chassis, steering, and suspension components. You may need to make minor adjustments.
- Fabrication: This includes building or installing the turbo manifold, intercooler piping, and new exhaust. It also involves modifying the shift linkage if you’re keeping the original transaxle.
- Wiring Integration: Run the new Honda engine harness. This involves connecting it to the DeLorean’s chassis systems like ignition, lights, and gauges. This step requires patience and a good wiring diagram.
- Fuel and Cooling: Install the upgraded fuel pump, lines, and injectors. Mount the new radiator and intercooler, routing all new hoses securely.
- Final Assembly and Tuning: Once everything is physically installed, the moment of truth arrives—first startup. It likely won’t be perfect. This is where a professional tuner with Honda ECU experience becomes invaluable to dial in the air/fuel ratios and ignition timing for safe, powerful operation.
Real-World Benefits: What It Feels Like to Drive
The difference isn’t subtle. The weight saving over the rear wheels improves turn-in and reduces understeer. The turbo Honda engine provides immediate throttle response and a linear power band that pulls strongly to redline. Suddenly, the DeLorean feels agile and eager.
- Acceleration: 0-60 mph times can drop into the low 5-second range or even less, a massive improvement from the original 10+ seconds.
- Driveability: Modern fuel injection and tuning mean it starts instantly, idles smoothly, and drives like a new car in traffic.
- Sound: The PRV’s grumble is replaced by a Honda’s high-RPM wail combined with the whistle of a turbo—a unique and thrilling soundtrack.
Common Challenges and How to Overcome Them
It’s not all smooth sailing. Being aware of the hurdles helps you prepare.
- Cost: Even a DIY swap can cost several thousand dollars. Sourcing used parts can help, but don’t skimp on critical components like the ECU or turbo.
- Technical Skill: This project requires welding, fabrication, and advanced automotive electrical knowledge. If you lack these skills, factor in the cost of hiring a specialist.
- Space and Time: You’ll need a dedicated workspace for months. The project will take much longer than you initially think, so patience is key.
- Emissions and Legality: In some regions, an engine swap may make the car illegal for road use. Always check your local regulations before you begin.
FAQ: Your Turbo Honda DeLorean Questions Answered
Is a turbo Honda engine swap legal?
Legality varies by country, state, and county. In some places, it’s fine if all emissions equipment from the newer engine is retained. In others, any engine change is prohibited. You must check with your local Department of Motor Vehicles or equivalent authority first. It’s the most important first step.
How much horsepower can I expect?
With a conservative turbo setup on a K-series engine, a reliable 300-350 horsepower is very achievable. That’s more than double the original output and completely transforms the car’s performance. Pushing beyond 400 hp is possible but requires more extensive internal engine upgrades.
Can I keep the original DeLorean transmission?
Yes, using an adapter plate is common. The original transaxle can handle the increased power if treated respectfully, but some owners choose to upgrade its internals for peace of mind. A stronger clutch is an absolute requirement.
Will it hurt the car’s value?
This is debated. A purist may pay less for a swapped car. However, a professional, well-documented swap that solves the car’s biggest flaw can actually increase its value to an enthusiast who wants to drive and enjoy it. It opens the car to a new audience.
What’s the total cost of a swap like this?
If you do all the labor yourself, a budget of $8,000 to $15,000 is realistic, depending on engine choice and whether you buy new or used parts. If you hire a shop to do the complete swap, costs can easily exceed $25,000. Always get detailed quotes.
Is This Swap Right For You?
Replacing the heart of your DeLorean with a turbo Honda engine is a monumental project. It’s not for the faint of heart or the mechanically timid. However, for the right person, it’s the ultimate expression of ownership. It preserves the iconic design while finally delivering the driving experience the exterior promises.
It solves the fundamental issue that has plagued the DMC-12 since its release. The result is a hybrid that honors the past while embracing modern performance, creating a truly one-of-a-kind driving machine that turns heads not just for its looks, but for its surprising speed. If you have the resources, skill, and passion, it might be the perfect project to bring your DeLorean into the 21st century.