Senior Tech Team
Join Date: Apr 2012
Location: Yerington, Nevada
Re: Fuel Pump and Spark Plug Recommendation
NGK and Auto-Lite are great spark plugs.
E3, I have had nothing but bad news with them, they shroud the spark way too much, and fully empty wallets for a mediocre, to just plain useless part.
Spark plug heat ranges ARE NOT set by ignition systems, they are set by engine parameters, mostly compression ratios.
Plug gaps are set by the emissions level of the engine, and/or the processor type. An HEI, NO MATTER THE COIL, .045 MAXIMUM. MSD, .045 maximum. Engines with serious compression ratois would need less spark plug gap to overcome the compression resistance (a function of the compression ratio) in the chambers.