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Bored&Stroked · 11-07-2019, 10:00 AM

That corresponds to a heat range in NGK of 9 - which is what we use for blown alky and high boost (racing only). I would think it would be very cold for your purposes - and obviously quite expensive. That is the problem with this 5/8" reach - just not many options.

11-07-2019, 10:00 AM	#64
Bored&Stroked Senior Member Join Date: Jan 2011 Location: Central Ohio Posts: 5,070	Re: Spark Plug Protrusion into Head? That corresponds to a heat range in NGK of 9 - which is what we use for blown alky and high boost (racing only). I would think it would be very cold for your purposes - and obviously quite expensive. That is the problem with this 5/8" reach - just not many options.