Hey car enthusiasts, gearheads, and rotary engine lovers! Let's dive deep into the fascinating world of the Mazda RX-7 and its iconic rotary engine. If you're here, chances are you're curious about the price of an RX-7 rotary engine, or maybe you're dreaming of owning one yourself. Well, you've come to the right place! This comprehensive guide will break down everything you need to know about the RX-7's heart, from its various iterations to what you can expect to pay, and even some tips for buying and maintaining this unique powerplant. So, buckle up, because we're about to take a thrilling ride through the world of the Wankel engine!

Understanding the Mazda RX-7 Rotary Engine

Before we jump into the pricing, let's get acquainted with the star of the show: the Mazda RX-7 rotary engine. Unlike traditional piston engines, the rotary, also known as the Wankel engine, uses a triangular rotor that spins inside an oval-shaped housing. This design provides a smooth, high-revving power delivery that's become synonymous with the RX-7. The RX-7 saw three distinct generations, each with its own version of the rotary engine, offering different power outputs and characteristics. Understanding these differences is key to understanding the price and what you're getting yourself into.

The first generation, known as the SA/FB, rolled out in the late 1970s and early 1980s. These cars featured the 12A rotary engine, known for its reliability and relatively modest power. The second generation, the FC, arrived in the mid-1980s and brought the 13B rotary engine to the table. The 13B was a step up in performance, with more power and improved reliability compared to its predecessor. Then came the third generation, the FD, which is arguably the most iconic. Produced from the early to late 1990s, the FD featured a turbocharged 13B-REW engine that's capable of producing some serious horsepower. This engine's legacy has established itself as one of the most revered rotary engines.

The RX-7's rotary engines are known for their high revving nature and distinct exhaust note. The rotary engine's compact size and lightweight design also contribute to the car's balanced handling. One of the unique aspects of these engines is the use of apex seals. These seals are what keep the combustion chambers sealed and are a critical component for engine function. Over time, these seals can wear out, requiring rebuilds. However, the unique qualities and performance of this rotary engine have earned them a dedicated fanbase. This is why the price of an RX-7 rotary engine is always fluctuating due to demand and the engine's condition.

The 12A Rotary Engine

The 12A rotary engine is a classic. This engine is the original rotary engine that helped Mazda build its reputation. The 12A's simple design and ease of maintenance make it a popular choice for enthusiasts. The 12A is not as powerful as its later counterparts but it is known for being reliable and smooth. If you are looking for a project car, a 12A rotary engine could be a good starting point. Be prepared, though, as finding parts for the 12A can be more challenging than for the later 13B. The price of a 12A engine depends on its condition, and finding a well-maintained one might require a bit of searching.

The 13B Rotary Engine

The 13B rotary engine is the engine that many associate with the RX-7. This engine is more powerful than the 12A and it has found its way into many Mazda vehicles over the years. The 13B is known for its reliability and tunability. The 13B also comes in two main flavors: Naturally Aspirated and Turbocharged. The naturally aspirated 13B, commonly found in the FC, provides a good balance of performance and fuel efficiency. However, the turbocharged 13B-REW, found in the FD, is the true performance beast. It provides higher power outputs that are perfect for those who are looking for more performance. Due to the demand, the price of a 13B rotary engine can be a bit higher. However, the performance and reliability make the 13B a worthy choice.

The 13B-REW Rotary Engine

The 13B-REW is the holy grail of rotary engines, especially among RX-7 enthusiasts. With its twin-turbo setup, the 13B-REW offered exhilarating performance. This engine is able to produce a significant amount of power. It has been praised for its responsiveness and power delivery. However, the 13B-REW's complexity and the demands of the twin-turbo system can also lead to higher maintenance costs. Therefore, the price of a 13B-REW is generally at the higher end of the spectrum. If you're after the ultimate RX-7 experience, the 13B-REW is the engine to have, but be prepared to take care of it.

Factors Influencing the Price of a Mazda RX-7 Rotary Engine

Alright, let's talk about the moolah! The price of a Mazda RX-7 rotary engine can vary quite a bit, depending on a variety of factors. Knowing these factors will help you make an informed decision and avoid any surprises when you're in the market for one. Let's delve into these key elements.

Condition

This is perhaps the biggest factor that determines the price. A freshly rebuilt engine in pristine condition will obviously command a higher price than a core engine that needs a full rebuild. Things to consider include the engine's compression, the condition of the rotors and housings, and whether it has been ported or modified. A good compression test is essential when evaluating any rotary engine to see how it performs.

Mileage

Just like with any engine, the mileage of a rotary engine plays a big role in its price. Higher mileage generally means more wear and tear, and potentially a shorter lifespan before a rebuild is needed. Always ask for the engine's service history. Keep in mind that rotary engines can have a shorter lifespan than piston engines, so mileage is crucial in terms of longevity.

Modifications

Has the engine been modified? Upgrades like porting, aftermarket rotors, or improved cooling systems can increase the value, especially if they are done by a reputable shop. However, be cautious; some modifications might not be well-executed and can negatively affect the engine's reliability. Check the quality and reputation of the shop that has done the work.

Location

Where you're buying the engine can also affect the price. The availability of RX-7 parts varies by region. The prices might be higher in areas with a strong car scene, or where these engines are in high demand. If you are in a location where the RX-7 isn't as popular, you might be able to find a good deal.

Seller

Are you buying from a private seller, a salvage yard, or a specialist shop? Each has different overhead costs and profit margins. Specialist shops that rebuild and test the engines often charge more, but they might offer a warranty. Buying from a private seller can sometimes get you a better deal, but you're also taking on more risk.

Rarity

The specific engine model and its rarity can impact the price. For example, a turbocharged 13B-REW will typically be more expensive than a naturally aspirated 13B because of the performance gains that the engine provides. If you are after something unique, the rarity of the engine can drive the price up. Special edition engines or those with rare modifications can fetch higher prices.

Price Ranges for RX-7 Rotary Engines

Okay, guys, let's talk numbers. Please remember that these are just estimates, and the actual price can vary widely based on the factors we just discussed. Keep in mind that the prices of RX-7 rotary engines are subject to change. Make sure that you do your own research before making any final decisions.

12A Engine Price

You can typically find a 12A rotary engine in decent condition for anywhere between $500 to $2,000. These engines are generally the most affordable due to their older technology and simpler design. Keep in mind that parts might be more difficult to find than for the 13B.

13B Engine Price

The price of a 13B engine typically falls in the range of $1,000 to $3,500. This depends on whether it's naturally aspirated or turbocharged, as well as its overall condition. Naturally aspirated engines will often be cheaper than their turbocharged counterparts.

13B-REW Engine Price

Be prepared to shell out a bit more for the coveted 13B-REW. The prices often range from $2,500 to upwards of $6,000 or more, especially for engines in excellent condition with low mileage or those that have been freshly rebuilt. This range reflects the performance and more complex nature of this engine.

Buying Tips for Mazda RX-7 Rotary Engines

Now that you've got an idea of the prices, here are a few key tips to keep in mind when buying an RX-7 rotary engine:

Do Your Research

Before you do anything, do your homework! Research the different engine types, their specifications, and their common problems. Know what you are looking for and what to expect.

Get a Compression Test

A compression test is absolutely crucial. This will tell you the health of the engine and if it needs a rebuild. The numbers from the compression test should be within the acceptable range for the engine to function properly. Get this test done before you buy!

Inspect the Engine

If possible, inspect the engine in person. Look for any signs of leaks, rust, or damage. Check the overall cleanliness of the engine. Check the service history of the engine. A well-maintained engine is more likely to be a reliable engine.

Ask Questions

Don't be afraid to ask the seller questions. Inquire about the engine's history, any modifications, and any known issues. The more you know, the better.

Consider a Rebuild

If you're buying a core engine, factor in the cost of a rebuild. Rebuilding a rotary engine can be expensive, so budget accordingly.

Source a Reliable Seller

Buy from a reputable seller with a good reputation. Check online reviews or ask for referrals to ensure you're dealing with someone trustworthy.

Verify the Parts

Make sure the engine comes with all the necessary parts, such as the ECU, wiring harness, and other related components. These parts are essential for the engine to run properly.

Maintaining Your RX-7 Rotary Engine

So, you've got your rotary engine. Congrats! Now, let's talk about keeping it running smoothly. Maintaining a rotary engine is different from maintaining a piston engine, but it's not overly difficult. Here are some key maintenance tips.

Regular Oil Changes

Regular oil changes are critical for a rotary engine, as the oil lubricates the rotors and housings. Use high-quality oil and change it more frequently than you would in a piston engine. The frequency may depend on driving conditions, but most owners change their oil every 3,000 to 5,000 miles.

Coolant System

Keep a close eye on your coolant system. Overheating can be deadly for a rotary engine. Make sure your radiator is clean and functioning correctly, and use a high-quality coolant mix. Regular flushes are recommended.

Ignition System

The ignition system is important. Rotary engines are sensitive to spark quality. Replace spark plugs and wires regularly, and use high-quality components. Properly functioning spark plugs are essential for proper combustion.

Apex Seal Wear

Be aware of apex seal wear. Over time, these seals will wear, and compression will decrease. Regular compression tests will help you monitor the condition of your engine.

Warm-Up Properly

Always allow the engine to warm up properly before pushing it hard. This is critical for both the engine's longevity and performance. Avoid high revs until the engine is at operating temperature.

Use Quality Fuel

Use high-quality fuel. Rotary engines tend to perform better with premium fuel.

Listen to Your Engine

Pay attention to any unusual noises or performance issues. Rotary engines should run smoothly. Any unusual sounds or performance changes could indicate a problem that needs attention.

Conclusion: Making the Rotary Dream a Reality

So, there you have it, guys! A comprehensive guide to the price of Mazda RX-7 rotary engines, and everything else you need to know. Owning and maintaining an RX-7 with a rotary engine can be a rewarding experience. These engines provide a unique driving experience and are fun to work on. Keep in mind that prices can vary, but with careful research and smart buying, you can find the perfect rotary engine for your project. Whether you're a seasoned enthusiast or a newcomer to the rotary world, we hope this guide has helped you in your quest. Happy wrenching, and enjoy the smooth, high-revving thrill of the Wankel engine!