Tech Articles

Tech Articles

Mailbag: What is a Battery BCI Number?

A battery BCI number indicates the physical size dimensions of the battery rather than its Amp Hours (AH) rating. The BCI group numbers are used to categorize automotive batteries by […]

Tech Articles

The 3 Types of Engine Vibration in Cars and Trucks

Editor’s Note: The technical information below comes from the engine-vibration experts at Fluidampr. … Engine vibration accelerates engine wear, breaks engine parts, and robs us of horsepower. There are three […]

Tech / Tech Articles

Ask Away! with Jeff Smith: Dialing in Vacuum Advance with an Edelbrock ProFlo-4 EFI

I have a Ford 347 stroked small block with 10:1 compression and a “race cam.” The builder won’t give me cam specifics. I just installed the Edelbrock Pro Flo 4 […]

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Hunting for a Drill Bit to Drill Through Hardened Steel

Many articles I’ve written about tools revolve around some more complicated, some might say exotic, items. Today, we’re going to deviate and talk about something that is seemingly simple—a specialty […]

Tech Articles

Ask Away! with Jeff Smith: The Science Behind Low-Compression Engines

I’ve seen a couple of posts where the discussion is about how much compression to run and still use a supercharger. There were lots of ideas kicked around but it […]

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The Easy Way to Make 820+ HP in a 4.8L Junkyard Pull

Never before have so many enjoyed so much for so little. Take a look around. We are smack dab in the middle of the second major Muscle Car era, and […]

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Ask Away! with Jeff Smith: Troubleshooting Valve Train on Small Block Chevy 355

I have a 355 c.i.d. small-block Chevy with a big cam, decent compression, and production iron heads. The cam is an Isky 268/272 at 0.050 with 0.640-inch lift. It has […]

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4 Engine Assembly Tips for Maximizing Cam Bearing Performance

For many years, nearly all automotive camshaft bearings were manufactured with a babbitt-metal lining. Babbitt metal is a soft metal comprised mostly of tin (86 percent for Ford Motor Co. […]

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Ask Away! with Jeff Smith: Fixing Spongy Brake Pedal Feel After Transmission Swap

I have a brake bleeding question. We installed a Wilwood four-wheel disc brake system in my ’68 Nova about 15 years ago, and for a couple of years of driving […]

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Dyno Test: 120+ HP Gains and No Low-End Loss with Cam Swap on 6.2L LS Engine

Why were we so excited about swapping cams on the all-aluminum L92? Many reasons. The first was that we had previously run the Summit Stage 4 Pro LS cam (SUM-8711) […]