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Supressor vs Resistor plugs?
What is the difference or purpose of resistor or supressor plugs. I was looking for NOS plugs for my 351c 4v and just not sure which is best. Thanks

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Vehicles: 1972 Sprint Sportsroof CJ
2011 F-150, Lariat 4x4, Super Crew
A suppressor sparkplug has a small coil of wire that restricts high frequency AC current as the spark jumps the plug gap. It doesn't affect DC current. A resistor plug restricts both AC and DC current and weakens the spark energy.

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Yea,Tho i cruise through the valley of the shadow of rice,I will fear no Turbo,For Torque art with me.Thy rods and crankshaft,they comfort me. Big Grin Robert
Aren't both used for noise supression? I do believe resistor plugs and supression wires are necessary with electronic ignitions.

Jeff T.

Low buck, touring style, '73 Convertible "rolling restoration", 351c, 2v heads with a shave and a haircut, Performer intake, Holley 650(ish), roller rockers, screw in studs, guideplates, stainless valves, Duraspark / Motorsports MSD, T-5 conversion. 1-1/8" front, 3/4" rear swaybars KYB shocks and some home brewed subframe connectors. Future plans; JGC steering box, Cobra brakes and... paint, interior, etc.

When I die I want to die like grandpa, peacefully in my sleep... not screaming, like his passenger.

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