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Old 07-26-2013, 12:27 PM
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Default NGK spark plug heat range
Anyone has experience with this manufacturer? What heat range should be used as a starting point for 9,5:1 compression with Ford Duraspark Ignition?

Simon
Last edited by CobraV8; 04-11-2024 at 06:25 AM..
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Old 07-26-2013, 01:42 PM
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I would start with a 6 or 7 (6 being hotter). But u can call or email NGK for better advice.

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Old 07-26-2013, 04:18 PM
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Yes, call their techline-very helpful
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Old 07-27-2013, 12:16 PM
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Thanks, will do!
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Old 08-17-2013, 09:19 PM
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What reach plug do you require? Is it tapered seat or 14mm gasket style?
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Old 08-17-2013, 10:50 PM
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As a ball park figure, for every 100hp you add to the stock engine, you should drop one heat range from the stock recommended plug.
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Old 08-18-2013, 03:22 AM
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I ended up with the BCP7ES-11 (14mm gasket style). Engine is running strong, no fouling in stop and go also. Gap is set at 0.035"
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Old 08-20-2013, 09:09 PM
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Excellent
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