Tech Articles

Aftermarket GM 12-bolt
Tech Articles

Dana 60 vs. GM 12-Bolt vs. Ford 9”: The Pros & Cons of Popular Rear End Assemblies

You’d think selecting a rear end for a project car would be easy. It’s not. Browse Summit Racing’s website or catalog and you’ll discover there are almost too many choices. […]

Leakdown test how-to by Patrick Hill
Tech Articles

Ask Away! with Jeff Smith: Does 40% Leakdown Test Results Require New Piston Rings?

I just bought a used 5.3L LS engine out of the junkyard and after we got the engine back to the shop and mounted it on an engine stand, we […]

silver ford mustang 1993 gt supercharged
Tech Articles

Ask Away! with Jeff Smith: Diagnosing Ticking Noises and White Smoke in a Supercharged ’93 Ford Mustang GT

I’ve been looking online for help to figure out what is happening to my car and I thought your expertise may help. I have a supercharged ‘93 Mustang GT with […]

Holley-Dominator-VMS-1
Tech Articles

How to Set-Up and Tune Holley’s Dominator EFI System (Part 1)

It’s no secret that aftermarket electronic fuel injection (EFI) systems are becoming more and more commonplace. It should come as no surprise however, that some of the early systems were […]

Camshaft-installation
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 […]

Trick-Flow-Camshaft-install
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 […]

cam degree wheel
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 […]

E85 corrosion test
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 […]

1989 GMC 1500 4x4 red
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 […]

spark plug heat range chart
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 […]