Monday mailbag

Q: Can I remove the fan shroud on my cooling fan? … A: It might seem like it’s just in the way, but the fan shroud plays an important role in the […]

Q: Do you have an advice for hooking up a new EFI kit? … Tips For Hooking Up Your ECU Connecting the wires is an important step in getting your electronic […]

I have a 1970 Nova SS with a 11.5:1 compression, 355 cubic-inch small block. It has Sportsman II heads, a COMP Cams hydraulic camshaft (292 degrees advertised duration, .507 inches […]

Q: Is a plastic or metal intake tube better? … A: Air intake kits are a popular performance upgrade. They are affordable, easy to install, and provide noticeable gains over a […]

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: 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 […]