The Nissan 350z, a legendary sports car, boasts a potent engine and sleek design. However, some enthusiasts crave even more power and performance. An engine swap can breathe new life into your 350z, transforming it into a unique beast. But with so many options, where do you even begin, guys? This comprehensive guide dives into the world of 350z engine swaps, exploring popular choices, factors to consider, and the overall process.

Why Consider an Engine Swap for Your 350z?

Before diving into the specifics, let's discuss why you might consider swapping the engine in your 350z. The factory VQ35DE or VQ35HR engines are capable, but they have limitations. An engine swap offers several potential benefits:

• Increased Horsepower and Torque: This is the most common reason. Swapping to a more powerful engine, like a V8 or a turbocharged inline-six, can significantly boost your car's performance.
• Improved Reliability: While the VQ engines are generally reliable, some swaps can offer even greater dependability, especially when built with upgraded components.
• Unique Driving Experience: An engine swap can dramatically alter the character of your 350z, providing a completely different driving experience. Imagine the sound and feel of a high-revving Honda K20 or the raw power of an LS V8.
• Customization: Swapping an engine allows you to tailor your 350z to your specific needs and preferences. Whether you're building a drift car, a track weapon, or a street machine, an engine swap can help you achieve your goals.
• Solving Existing Engine Issues: If your original engine is severely damaged or nearing the end of its life, an engine swap can be a cost-effective alternative to rebuilding it.

Popular Nissan 350z Engine Swap Options

Okay, so you're sold on the idea of an engine swap. Now, let's explore some of the most popular options for the Nissan 350z. Each swap has its pros and cons, so carefully consider your budget, goals, and skill level.

1. The LS Swap (GM LS V8 Engines)

The LS swap is arguably the most popular engine swap for the 350z, and for good reason. GM's LS series of V8 engines are readily available, relatively affordable, and offer incredible performance potential. They're also incredibly well-documented, with a vast aftermarket support network. This means finding parts, information, and even complete swap kits is relatively easy.

Pros:

• High Horsepower Potential: LS engines can easily produce 400+ horsepower in naturally aspirated form, and even more with forced induction.
• Affordable: Compared to other high-performance engines, LS engines are relatively inexpensive to purchase and maintain.
• Large Aftermarket Support: The LS engine has a massive aftermarket, making it easy to find performance parts, swap kits, and technical support.
• Reliability: LS engines are known for their durability and reliability, especially when properly maintained.
• Sound: The sound of an LS V8 is unmistakable and intoxicating.

Cons:

• Weight: LS engines are heavier than the stock VQ engines, which can affect handling.
• Complexity: While LS swaps are common, they still require significant wiring and fabrication work.
• Cost: While the engine itself may be affordable, the cost of the swap kit, installation, and tuning can add up quickly.

Popular LS Engine Choices for 350z Swaps:

• LS1: The original LS engine, found in the C5 Corvette and 4th-generation F-bodies (Camaro/Firebird).
• LS2: A larger, more powerful version of the LS1, found in the C6 Corvette, Pontiac GTO, and Cadillac CTS-V.
• LS3: A further improved version of the LS2, found in later C6 Corvettes and the 5th-generation Camaro SS.
• LS7: A high-revving, naturally aspirated engine found in the C6 Corvette Z06. This is a more expensive option but offers incredible performance.
• Truck LS Engines (4.8L, 5.3L, 6.0L): These engines are often the most affordable LS options and can be a great starting point for a budget build. They may require some modifications to fit the 350z, but they offer excellent value for the money.

2. The 2JZ-GTE Swap (Toyota Supra Engine)

The Toyota 2JZ-GTE is a legendary engine known for its incredible power potential and bulletproof reliability. Swapping a 2JZ into a 350z is a dream for many enthusiasts, but it's a more complex and expensive undertaking than an LS swap. However, the results can be truly spectacular.

Pros:

• Extreme Power Potential: The 2JZ-GTE is capable of producing massive horsepower with the right modifications.
• Reliability: The 2JZ is known for its incredible durability, even under extreme stress.
• Cool Factor: Swapping a 2JZ into a 350z is a unique and impressive feat.

Cons:

• Cost: 2JZ engines and swap components are significantly more expensive than LS counterparts.
• Complexity: 2JZ swaps are more complex, requiring extensive wiring, fabrication, and tuning.
• Availability: Finding a good condition 2JZ-GTE can be challenging.

3. The Honda K-Series Swap (K20/K24)

While it might seem unconventional, swapping a Honda K-series engine into a 350z is a growing trend. The K20 and K24 engines are lightweight, high-revving, and surprisingly powerful, offering a unique alternative to V8 and inline-six swaps.

Pros:

• Lightweight: K-series engines are significantly lighter than the VQ, LS, and 2JZ, improving handling.
• High-Revving: K-series engines love to rev, providing a thrilling driving experience.
• Relatively Affordable: Compared to 2JZ swaps, K-series swaps can be more budget-friendly.

Cons:

• Lower Horsepower: K-series engines typically produce less horsepower than LS or 2JZ engines (in stock form).
• Complexity: K-series swaps still require custom fabrication and wiring.
• Unconventional: Some enthusiasts may not appreciate the idea of putting a Honda engine in a Nissan.

4. The VQ35DE/VQ35HR (Built and Boosted)

Instead of swapping to a completely different engine family, you could also consider building and boosting your existing VQ35DE or VQ35HR. This involves upgrading the internals of the engine (pistons, rods, crankshaft, etc.) and adding a turbocharger or supercharger. This can be a great way to achieve significant power gains while retaining the original character of the car.

Pros:

• Retains Original Engine: Keeps the original engine, maintaining the 350z's identity.
• Potentially Cost-Effective: Can be cheaper than a full engine swap, depending on the extent of the build.
• Familiarity: You're already familiar with the engine and its quirks.

Cons:

• Requires Expertise: Building and boosting an engine requires significant technical knowledge and experience.
• Reliability Concerns: Forced induction can put a lot of stress on the engine, potentially reducing reliability if not done correctly.
• Complexity: Requires extensive tuning and modifications.

5. The Rotary Engine Swap (13B/20B)

For the truly adventurous, a rotary engine swap can be an exciting (and challenging) option. Mazda's rotary engines (like the 13B and 20B) are known for their high-revving nature and unique sound. However, they also have a reputation for being less reliable than traditional piston engines.

Pros:

• High-Revving: Rotary engines can rev to incredibly high RPMs.
• Unique Sound: The rotary engine has a distinctive and captivating sound.
• Lightweight: Rotary engines are very compact and lightweight.

Cons:

• Reliability: Rotary engines are known for their reliability issues, particularly apex seal failures.
• Fuel Economy: Rotary engines typically have poor fuel economy.
• Complexity: Rotary swaps are complex and require specialized knowledge.

Factors to Consider Before Choosing an Engine Swap

Before you commit to a specific engine swap, carefully consider the following factors:

• Budget: Engine swaps can range in price from a few thousand dollars to tens of thousands of dollars. Set a realistic budget and stick to it.
• Goals: What do you want to achieve with the engine swap? Are you looking for maximum horsepower, improved reliability, or a unique driving experience?
• Skill Level: Engine swaps require significant mechanical skills. If you're not comfortable working on cars, you'll need to hire a professional.
• Availability of Parts and Support: Choose an engine swap that has good aftermarket support and readily available parts.
• Legality: Ensure that the engine swap is legal in your state or country. Some areas have strict emissions regulations.
• Weight Distribution: Consider how the engine swap will affect the weight distribution of your car. A heavier engine can negatively impact handling.
• Transmission Compatibility: You'll need to choose a transmission that is compatible with the new engine. This may require custom adapters or modifications.
• Wiring: Engine swaps require extensive wiring. You'll need to either modify the existing wiring harness or purchase a standalone wiring harness.
• Cooling: The new engine may require a different radiator or cooling system.
• Exhaust: You'll need to fabricate a custom exhaust system to fit the new engine.

The Engine Swap Process: A General Overview

While the specific steps involved in an engine swap will vary depending on the engine you choose, here's a general overview of the process:

1. Research and Planning: Thoroughly research the engine swap you're considering and create a detailed plan.
2. Gather Parts and Tools: Collect all the necessary parts, tools, and equipment.
3. Remove the Old Engine: Carefully remove the original engine from the car.
4. Prepare the Engine Bay: Clean and prepare the engine bay for the new engine.
5. Install the New Engine: Install the new engine and transmission.
6. Wiring: Connect the wiring harness and ensure all electrical components are functioning correctly.
7. Cooling System: Install the radiator and cooling system.
8. Exhaust System: Fabricate and install the exhaust system.
9. Fuel System: Connect the fuel lines and ensure the fuel system is functioning correctly.
10. Fluids: Fill the engine with oil, coolant, and other necessary fluids.
11. Tuning: Tune the engine to ensure it's running optimally.
12. Testing: Test drive the car and make any necessary adjustments.

Conclusion

Swapping the engine in your Nissan 350z is a significant undertaking, but it can be incredibly rewarding. By carefully considering your options, planning thoroughly, and either possessing the necessary skills or hiring qualified professionals, you can transform your 350z into the car of your dreams. Whether you're after raw horsepower, improved reliability, or a unique driving experience, an engine swap can unlock the full potential of your Z. So, do your research, weigh your options, and get ready to experience the thrill of a custom-built machine. Good luck, and happy swapping!