Spark Plug Guide for Coyote Engines
1. Naturally Aspirated (NA) Cars and Trucks
- Recommendation: Use the stock spark plug.
- Reason: The stock spark plug is designed to provide optimal performance and efficiency for NA applications and they do not require any gap change or colder heat range.
2. Forced Induction (FI) Cars and Trucks
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Recommendation: Use NGK 6510 spark plugs.
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Nitrous: Gap .030-.038 will be more than efficient up to a 200shot
- For boost levels up to 16-18 PSI: Gap the spark plugs at 0.026 inches.
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- Boost levels above 18 PSI: Adjust the gap to between 0.018 - 0.022 inches.
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Reasoning: A tighter gap will help prevent spark blowout under higher pressures, ensuring reliable ignition and performance.e