Tech

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Mailbag: Tips for Choosing the Right Tie-Downs for Your Race Trailer

Q: I need to buy some new tie-downs for my race trailer. What are some rules or guidelines that should be followed when purchasing tie-downs? How about tips for proper installation? Anything else I need to know before I hit the road to the first race of the year? A: First and foremost, your tie-down straps must be

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Quick Tech: Wastegates vs. Blow-Off Valves…What’s the Difference?

Turbocharging continues to gain popularity. But there are still a few areas of a typical turbocharger setup that remain fuzzy to turbo newbies. One of the most common misunderstandings involves the basic difference between a wastegate and a blow-off valve. So here goes… What is a Wastegate? A wastegate prevents the turbo from creating too much boost. Once

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Mailbag: Installing a FiTech GoStreet EFI on a Pontiac 400

Q: I have a 1979 Pontiac Trans Am with a 400 cubic-inch engine. I am looking at the FiTech GoStreet EFI 400HP Self-Tuning Fuel Injection System. Will this system mount straight up to my Pontiac engine? A: This self-learning EFI system features straightforward installation with application-specific modifications required. The system delivers a quick and accurate start-up process

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Quick Tech: Return- vs. Non Return-Style Fuel Pressure Regulators for Low-Pressure Fuel Systems

Back in the day, low-pressure fuel delivery systems were the norm. As carburetors evolved and fuel injection came into play, fuel pressures increased and low-pressure systems became common. However, low-pressure fuel systems remain relevant because many vintage cars use Weber or Stromberg carb setups. Aftermarket low-pressure pumps and regulators are also used to replace OE parts for

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Infographic: Tire Rotation Patterns for Different Drivetrain Configurations

Your vehicle’s four tires don’t wear evenly. This happens because the front of your vehicle typically weighs more than the rear, and because your front tires turn while your rear tires don’t, and because (in the United States) we typically make left turns at higher speeds than we make right turns, causing the right-front tire to

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Video: How to Pressure Test Your Hose Assembly

Congratulations — you’ve created custom hose assembly for your vehicle. Automotive plumbing 101 says that before you go through the trouble of installing your new hose assembly, you’ll want to pressure-test it to make sure it’s leak-free. Fortunately, Earl’s Performance offers a complete kit that makes it quick and easy to test your assembly prior to installation,

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Mailbag: Correcting Speedometer Gears for Accurate MPH Readings

Q: I am having trouble finding the correct speedometer gear for my 1970 Mustang. The car has a top loader 4-speed transmission and a 4.10:1 rear-end ratio. I’m running 26-inch-tall rear tires, and a 21-tooth speedometer driven gear. The 21-tooth gear is the largest I can find, and the speedometer reads about 27 mph fast.

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