Choosing the Right Spark Plugs for Your 1984-1987 Ferrari GTO
Keep your GTO's twin-turbo V8 running perfectly with the correct set of new aftermarket spark plugs.
- The Ferrari GTO's twin-turbo engine requires high-quality spark plugs; Iridium options from NGK are a top choice among owners.
- Choosing the correct heat range is essential to prevent engine damage or plug fouling.
- Symptoms of failure include misfires, rough idle, and poor acceleration.
- Replacement should be done by a specialist, as accessing the plugs on the V8 can be difficult and risks damage to coil packs.
Signs of Failing Spark Plugs in a GTO
Worn or incorrect spark plugs can cause noticeable problems. Because other ignition parts can cause similar issues, it's important to recognize the signs. Look for symptoms like engine misfires, a rough or shaky idle, and a general feeling of sluggishness or poor acceleration. You might also find the engine is harder to start than usual. While your GTO does not have a modern 'Check Engine' light, these performance issues are your car's way of telling you it's time for an inspection.
Choosing the Right Aftermarket Spark Plugs
The original spark plugs for the 288 GTO were made by Champion. While you can still find OEM-style plugs, many owners of classic Ferraris have successfully switched to high-quality aftermarket brands. For a high-performance, turbocharged engine like the GTO's, this is not a part to save money on.
Aftermarket Brand Tiers for Ferrari GTO
| Brand | Tier | Notes |
|---|---|---|
| NGK | Top Tier | Highly recommended in the Ferrari community for reliability and performance. Iridium plugs like the LMAR8AI-8 offer a long life and a strong, consistent spark perfect for the GTO's demanding engine. Choosing the correct heat range is vital; consult with a specialist for your specific driving style. |
| Champion | OEM / Good | The original brand for the GTO was the Champion RA59GC, a racing-style plug. These are a solid choice if you want to stick close to the original factory setup. Some owners of other classic models have noted concerns with modern standard Champion plugs, but their performance plugs are generally well-regarded. |
| Denso | Good | Denso offers quality Iridium spark plugs that are a suitable alternative. They are a major OEM supplier for many brands and produce reliable performance parts. There is less specific feedback for them in the classic Ferrari community compared to NGK. |
| Autolite | Standard | While Autolite is a common brand, it is generally not used or recommended for high-performance, exotic engines like the one in the 288 GTO. It is better to invest in a top-tier brand designed for such conditions. |
Heat Range is Critical
Spark plugs come in different "heat ranges," which refers to how quickly the plug dissipates heat. A plug that is too "hot" (doesn't dissipate heat well) can lead to pre-ignition. A plug that is too "cold" can accumulate carbon deposits and foul, especially with city driving. For NGK plugs, a lower number is hotter, while a higher number is colder. Many owners of similar Ferrari V8s use NGK plugs in the 6, 7, or 8 heat range depending on their use case.
Frequently Asked Questions
Should I use standard copper, platinum, or iridium plugs?
For the GTO's twin-turbo engine, iridium plugs are the best choice. They have an extremely high melting point, provide a more stable and powerful spark, and last much longer than copper or platinum plugs. This is a worthwhile investment for engine health and performance.
What is the correct spark plug gap for a Ferrari GTO?
The factory recommended gap is very specific. For example, one aftermarket iridium plug specifies a gap of 0.6mm (.025 inches). It is crucial to check the specification for the exact plug you are installing and gap it precisely. An incorrect gap can cause misfires and poor performance.
Are there any recalls for the GTO's spark plugs?
There are no recalls or Technical Service Bulletins (TSBs) from Ferrari or the NHTSA related to the spark plugs on the 1984-1987 GTO.
How often should I change the spark plugs?
For a classic, high-performance car like the GTO, spark plugs should be inspected regularly. Even with modern iridium plugs, it is good practice to inspect them every few years or during major services. If you notice any of the failure symptoms, they should be checked and replaced immediately.
Technical Specifications
OEM Part Numbers: 156441
OEM Plug: Champion RA59GC Recommended Aftermarket Type: Iridium Common Aftermarket Gap: 0.6mm / .025"
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Ferrari GTO: