Spark Plugs with Two-Step

Ed Wright · 02-01-2017, 07:59 PM

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.

02-01-2017, 07:59 PM	#25
Ed Wright Veteran Member Join Date: Mar 2005 Location: Sand Springs, OK Posts: 8,132 Likes: 896 Liked 390 Times in 170 Posts	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. __________________ Ed Wright 4156 SS/JA Last edited by Ed Wright; 02-01-2017 at 08:03 PM.