Automotive Basics
How To Determine Engine/Pinion Angle
Engine and pinion angle are relative to the ground. Most engines are set at 3 degrees, this allows the carburetor to sit level, however… [More…]
Dimensions
Technical Info
2-Minute Tech: How To Determine Steering Spline Size
To determine the spline size of a component (rack and pinion, steering column, and steering box), measure the outside diameter and count the number of splines. If there is a flat spot on the shaft and some of [More…]
How To & DIY
How To Measure for a Straight Axle Spring
There are two measurements that you can use to determine what spring length you’ll need for your project: Spring Perch Hole Center-Line Measurement: If you are using an axle with vertical perch bolt holes, you can [More…]
How To & DIY
How To Determine Proper Exhaust Tubing Size
A guide for exhaust-pipe tube size needed to balance prevention of excessive back-pressure while maintaining adequate exhaust-gas velocity. [More…]
How To & DIY
How to Measure for a Driveshaft
Greg Frick from Inland Empire Driveline Service in Ontario, California offers information on how to properly measure for a custom or refurbished stock or aftermarket performance driveshaft. In this video you learn to: Measure from [More…]
Technical Info
Shift Knob / Shift Handle Thread Sizes
Domestic, Import, Aftermarket, and Motorcycle Shift Knob and Shift Handle Thread Sizes [More…]
Technical Info
Wheel, Tire and Fender Fitment Calculator
Wheel and Tire Technical Information – Calculate Wheel Fitment, Tire Stretch and Rolling Radius. Includes Speedometer Error Calculator. Play with specs, try different settings and combinations, compare results… [More…]
Downloads
1946-53 American Classic Car Technical Sheets
The following American Classic Car Technical Sheets show exploded views of all major body parts and the corresponding OEM part numbers and frame dimensions. 1946-49 models also include electrical wiring diagrams. This information is invaluable [More…]
How To & DIY
How To Measure Wheel Back Spacing / Offset
Back Spacing is a measurement taken from within the inside of the rear side of the wheel. This measurement is important to be sure you have proper wheel clearance for your specific car before purchasing new wheels, wheel spacers and wheel adapters. [More…]
Automotive Basics
Tire Size? How To Read A Tire Sidewall
The side of your tire — known as the tire sidewall — contains all of the information you need to know about your tire size. Regardless of the manufacturer, all tires are required to show [More…]
How To & DIY
How To Determine Ride Height and Shock Absorber Length
Ride Height is the height of your car or truck when it is sitting and the suspension is at the optimum setting (height)… [More…]
Hood Rides & Hoopties
Wheel Bolt Pattern Cross Reference ~ What Wheels Fit?
Use the Wheel Bolt Pattern Cross Reference to select your wheel bolt or lug pattern: Select Number of Lugs and Stud Spread in either Inches or Millimeters. The results will display Make, Model and Year as well as the OEM Wheel Size (diameter and width) plus Stud Size, Hub Center Bore and Offset. [More…]
Technical Info
Engine Displacement Calculator
This calculator determines the displacement of the engine by two methods; selecting the engine to get the geometry of the configuration, or by the geometry to get the engine. You may select the engine manufacturer and designation to get the exact parameters. [More…]
How To & DIY
How To Plus Size Wheels and Tires
Plus Sizing your wheel and tire combination was designed to enhance vehicle performance and appearance by allowing fitment of larger diameter rims and lower profile tires. The theory is that while making these changes, you keep the overall tire diameter within 3% of the original equipment tires. [More…]
Technical Info
Early Ford Beam Axle Identification and Dimensions
The different early Ford axles are easy to identify by referring to the picture here, which was scanned from an old magazine article by Neal East. [More…]
Technical Info
Wheelbase Measurements for Popular Classic Cars
Wheelbase Measurements for Popular Classic Cars: Buick, Chevy, Ford, Frazer, Kaiser, Lincoln, Mercury, and Nash. [More…]
Technical Info
Popular Automatic Transmission Dimensions
So you want to replace the transmission in your classic or custom? How do you know what will even fit? This handy chart will help. [More…]
How To & DIY
How To Measure Wheel Bolt Pattern
Bolt pattern is the diameter of an circle formed by the centers of the wheel lugs. Common bolt patterns are 4, 5, 6, or 8 lug holes. The diagrams here indicate the proper measuring methods. [More…]
