Spark Plug heat ranges - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Jersthecool · 02-25-2012, 03:25 PM

So I'm in need of purchasing some spark plugs and with the rest of my order I'm getting some NGK Iridium's off of enjuku.

They show the different heat ranges for different amounts of boost you're running here's the list if you don't know what I mean.

Heat Range 6 for stock turbo 8-12psi
Heat Range 7 for upgraded turbo 13-15psi
Heat Range 8 for upgraded turbo 16-20psi
Heat Range 9 for upgraded turbo 21+psi

Now come's my question.. I'm planning to run 12psi for low boost which is what I'll be at most of the time being as it's my dd but I also was planning to run 18 psi for my high boost so really don't have any idea which heat range to get. Any info is appreciated.

02-25-2012, 03:25 PM	#1
Jersthecool Zilvia Junkie Join Date: Jul 2010 Location: Calgary, Canada Posts: 342 Trader Rating: (0) Feedback Score: 0 reviews	Spark Plug heat ranges So I'm in need of purchasing some spark plugs and with the rest of my order I'm getting some NGK Iridium's off of enjuku. They show the different heat ranges for different amounts of boost you're running here's the list if you don't know what I mean. Heat Range 6 for stock turbo 8-12psi Heat Range 7 for upgraded turbo 13-15psi Heat Range 8 for upgraded turbo 16-20psi Heat Range 9 for upgraded turbo 21+psi Now come's my question.. I'm planning to run 12psi for low boost which is what I'll be at most of the time being as it's my dd but I also was planning to run 18 psi for my high boost so really don't have any idea which heat range to get. Any info is appreciated.