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Q: What is a double-pass radiator? … A: In a single-pass radiator, coolant only crosses the radiator core one time. Single-pass radiators work well in most street applications. For stock […]

Cooling Basics – Row Quantity vs. Tube Size In the radiator core, coolant flows through tubes. The tubes are joined together by the fins. More heat can be exchanged when […]

Q: What do the different gasoline octane ratings mean? … A: The octane rating measures the performance of a particular fuel blend. The higher the number, the more compression it […]

Q: I’m building a Factory Five Mk4 Roadster and I would love to install a Boss Nine 427 engine, but it’s way out of my budget. Ford Performance offers a very […]

Q: Which is better between a body-on-frame and unibody chassis design? … A: Most vehicles are built using either “body-on-frame” or “unibody” design. The terms refer to the style of […]

Q: What are the different types of electric relays? … A: An electric relay is a high amperage switch controlled with a small electrical input. Normally, the small input controls an electromagnetic […]

Q: How old are my tires? … A: The serial number of a tire is the most effective way to determine its age. The serial number may also be referred […]

Q: Do I need tall valve covers? … A: Valve covers come in a variety of designs to give your engine the look you want. One important thing you will need […]

Q: I want to run E85 in my car. What should I know before changing fuels? … A: Many of us have seen the cars making huge power on E85 […]

Q: I’d like to install a larger throttle body on my Dodge Challenger with an automatic transmission. The car currently has a Summit Racing exhaust system and a Trick Flow […]