Re: Spark Plugs with Two-Step
If your not experiencing misfireing, I doubt you will lower your ET with any of those.
I just use non-platinum Autolite plugs. Gapped @ .050" in mine. I have found no ET improvement in different types of metal in spark plugs. Correct heat range (one step colder than factory is what I use in mine) and no misfires is as quick as anything I have stumbled onto. Somebody smarter than me may have found something different.
When I had my shop, all I did was tune ups & drivability diagnostics, and AC service. Replaced a ton of AC plugs with failed resistors (looked just like bad a plug wire on the 'scope), and Champions with a loose center electrodes. Several NGKs with high RPM misfires. Not as many as faulty resister AC plugs. They may have cured those things now, that was before 2010. Never encountered a defective Autolite. Started using those in everything. NAPA parts store guys called me Autolite Ed. LOL
Did not like to have come backs. Bad for business.
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Ed Wright 4156 SS/JA
Last edited by Ed Wright; 02-01-2017 at 08:03 PM.
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02-01-2017, 07:59 PM
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