Technical Info

A relay is essentially a switch that is operated electrically rather than mechanically. Although there are various relay designs, the ones most commonly found in low voltage automotive applications are electro-mechanical relays that work by activating an […]

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 […]

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 […]

When your big engine and TH400’s lack of overdrive has your engine screaming on the highway, a 4L80E transmission might just be the answer. The 4L80E transmission’s roots trace back to the Turbo-Hydramatic 400 automatic […]

Nothing ruins a sweet sounding ride more than a trunk that vibrates and doors that rattle. While most cars came with some sort of sound deadening from the factory, the older the car, the lower […]

This table below was supplied by Flowmaster. It’s intended as a basic reference guide to give you an idea of the general exhaust-pipe size needed to balance the prevention of excessive back-pressure while maintaining adequate exhaust-gas velocity. […]

Don’t sound like you don’t know what you’re talking about next time at the track. These are the terms you need to know… […]

There are many factors that affect the location of the motor in a hot rod or custom car or truck chassis: Plan ahead. The tech session produced several points to consider when mounting a motor in a hot rod or custom car or truck project… […]