Tech Articles

(Image/Mike Mavrigian)
Tech Articles

Comparing Camshafts (Part 2): Consider Individual Timing Events When Choosing a Cam

Editor’s Note: This is the second half of an article on how to interpret cam specs to select the right cam for your engine and vehicle needs. You can read the […]

(Image/Super Chevy)
Tech / Tech Articles

Comparing Camshafts: A History of Camshaft Specs and Choosing the Right Cam

Have you ever wondered why one camshaft makes more power than the other? Would you like to compare the behaviors of multiple cams without ever doing a cam swap? Written […]

Here’s a look at a camshaft in the process of being degreed. As you can see, the cam is driven by a Jesel belt drive, which simplifies the process dramatically (but that's another story). The 14-inch degree wheel is from B&B while the pointer is homemade. (Image/Wayne Scraba)
Tech Articles

Camshaft Degreeing Explained: Tools & Techniques for Degreeing a Cam

When a camshaft is “degreed” it means the camshaft position in the engine has been synchronized with the crankshaft position. Degreeing the cam is the only positive means to determine […]

In our very unscientific test, we immersed this strip of sheet aluminum in E85 for 9 months. We allowed the fuel to completely evaporate followed by full immersion. Note the presence of actual rust on the aluminum. This wipes right off and is probably due to metal particles that were present in the tub when we added the fuel. There was evidence of very minor pitting in the aluminum strip but hardly worthy of comment. The Holley metering block was also not damaged and showed no sign of damage or corrosion. (Image/Jeff Smith)
Tech Articles

Ask Away! with Jeff Smith: E85 Pump-Gas Additives—Not Ethanol—Cause Corrosion

Hi, I was wondering if you could help answer a few questions and doubts I have about moving forward with my E85 build. I know there’s a lot of hype […]

Tech Articles

Mailbag: How to Fix an Oil-Burning 1989 GMC 1500 4×4 Pickup

Q: The culprit is a 1989 GMC 1500 4×4 with a 350, automatic with overdrive, a 3.42 axle, and over 150,000 miles. It has recently developed a powerful thirst for […]

This is a comparison of a cold heat range plug (left) versus a much hotter heat range plug (right). Notice how the distance between the ceramic and the spark plug shell on the hotter plug requires heat to travel a farther distance, which maintains more heat in the spark plug. A hotter heat range plug is preferable for engines that only see light duty applications as in mild street driving. (Image/Autolite)
Tech Articles

Ask Away! with Jeff Smith: Determining Correct Spark Plug Heat Range

How do I tell the correct heat range spark plug for an engine? – Mark S. Jeff Smith: Simple questions sometimes require a bit longer answers. This is one of those […]

Product Profiles / Tech Articles

What is a Transmission Jack & How to Choose the Right One for Your Ride

A transmission jack is a must-have tool if you’re removing or installing a transmission. Now, while a lot of gearheads have made-do with improvised solutions for hoisting/moving a transmission, the […]

Since fitting an air intake tube and MAF sensor in a retorfitted engine bay is often difficult, many aftermarket EFI conversion kits rely on Speed Density systems. (Image/FiTech)
Tech Articles

EFI 101: Mass Air vs. Speed Density — What They Are & Which is Best for Your Ride

If you’re researching electronic fuel injection (EFI) systems, you’ve probably come across the terms speed density and mass air flow (MAF). These are the two most prevalent types of fuel […]

This photo shows the reluctor wheel installed onto the crank, with the installer tool removed. (Image/Mike Mavrigian)
Tech Articles

Installation and Removal Tips for LS Engine 24x or 58x Reluctor Wheels

Any builder familiar with late model engines knows that an engine’s computer control system monitors both camshaft and crankshaft position in order to achieve correct spark and fuel delivery. Many […]

Video: Measuring Power & Torque Gains From a Cam Swap in a 5.0L Ford
Tech Articles / Tech Projects / Videos & Galleries

Video: Measuring Power & Torque Gains From a Cam Swap in a 5.0L Ford

In today’s video, engine builder Richard Holdener is going to show you the dyno results of a previously modified 5.0L Ford engine before and after a cam swap (and unplanned […]