Which NGK Spark Plugs

Burn N' Up · 03-31-2006, 12:04 AM

Iridium is better, and there are two types available. IF you go to Supra sport they sell both the difference is;

to quote Charles Britz of SupraSport.com "The difference is in the heat range. BCPR5EIX11 3306 is a hotter plug meaning that there is more electrode exposed. You can use this plug with basic performance upgrades but when turning up the boost the BCPR6EIX 5689 is a better choice because it is colder. With the higher temperatures with a turbo charged engine could cause the hotter plug to fail or cause preignition."

03-31-2006, 12:04 AM	#3
Burn N' Up 3" Exhaust Join Date: Sep 2005 Posts: 238	Iridium is better, and there are two types available. IF you go to Supra sport they sell both the difference is; to quote Charles Britz of SupraSport.com "The difference is in the heat range. BCPR5EIX11 3306 is a hotter plug meaning that there is more electrode exposed. You can use this plug with basic performance upgrades but when turning up the boost the BCPR6EIX 5689 is a better choice because it is colder. With the higher temperatures with a turbo charged engine could cause the hotter plug to fail or cause preignition."