Spark Plugs

A Guide to Reading Spark Plugs

Your spark plugs are like a cipher. And to read a cipher code, you usually need a cipher key. That’s what this is—a cipher key that is going to help you “read” your spark plugs and understand what they’re telling you about how your engine is running. Is your engine running too rich? Too lean?

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Spark Plug Evolution: How Plasma is Being Used to Improve Spark Plug Performance

In junior high science class, you probably learned about the three states of matter: solids, liquids, and gases. Chances are you didn’t spend as much time talking about the lesser-known fourth state called plasma. Plasma, which is created by subjecting gas to a large amount of electrical energy, isn’t a new concept. However, plasma-assisted combustion is a

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New MSD Spark Plugs Incorporate 40 Years of Ignition Expertise

MSD’s entrance into spark plug manufacturing felt a little bit to us like Nike’s decision to start making socks to complement its shoe business. What took so long!? MSD has been a leader in ignition performance for more than 40 years, and now the company has taken all that knowledge from years of research and

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Monday Mailbag: Diagnosing Spark Plug Deposits

Got questions? We’ve got the answers—Mondays when the Summit Racing tech department tackles your automotive-related conundrums. This week, we’re reading spark plugs. J.B. • Houston, TX Q: I’m having a problem with my 1980 Ford 1/2-ton pickup. I put in fresh spark plugs and after 250 miles, I removed one and it was covered with black,

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Video: How to Properly Gap Your Spark Plugs

Spark plugs that are not properly gapped can lead to a misfiring, inefficient engine. Whether you’ve made serious performance modifications to your vehicle or simply enjoy your daily driver running right, it is important to gap your spark plugs correctly. What is the proper gap for your spark plugs and vehicle application? That depends. If

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Mailbag: Exploring Possible Cures for Pre-Ignition

Got questions?  We’ve got the answers—the Summit Racing tech department tackles your automotive-related conundrums. This week, we’re dialing in timing and straightening out a few cam/valvetrain issues.. D.B. • Basom, NY Q:  I own a 1977 Chevy 1/2 ton 4×4 with a 350 engine. I’ve had the engine bored .030 inches over, installed flat top

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