Once you are comfortable with the formulas and concepts presented in this book, you can take advantage of more sophisticated tools that let you actually model and test your engine-building ideas on your home computer. Engine-simulation software has been around for more than 20 years, and it has steadily improved. Current programs are very robust […]

## How to Build an Engine Math Spreadsheet

Setting up a PC-based spreadsheet to hold your important engine math formulas is a handy way to keep them all together and use them to calculate anything you want to know just by inputting the appropriate values. This assumes that you already have a core level of personal computer skills, and are able to open, […]

## The Tools and Equipment Guide for Engine Math Procedures and Measurements

Many of the formulas in this book require precision measurements to ensure accuracy. This chapter familiarizes you with the tools required to gather these measurements and some strategies for organizing and storing them for future reference. Most of the tools presented here are relatively inexpensive and can be added to your engine building inventory one […]

## Camshaft Math to Design Competitive Performance Engines

Camshafts are a subject that all car guys love to talk about, and those who listen tend to roll their eyes at the staggering number of terms and numbers. There’s lift and duration, overlap and lobe centers, lobe separation angles and so on, and all of them have numbers attached. Most enthusiasts have a basic […]

## Atmospherics and Performance Engine Combustion Guide

In addition to the nuts-and-bolts math of engine design and assembly, it is useful to know a few things about combustion and the effects of atmospheric pressure on engine tuning and performance. In particular, I discuss air/fuel ratios, correction factors for dyno testing, and the effects of altitude on engine performance. There are only a […]

## Mastering Exhaust System Math to Build High-Performance Engines

Exhaust systems don’t generally invoke the glamour and gut level appeal associated with many high-performance induction systems, but they certainly play a critical role in the performance of every engine. Through decades of experience we have learned most of the ideal shapes, sizes, and configurations for high-performance exhaust systems, and we are able to calculate […]

## Induction Math for High-Performance Engines

In Chapter 5, I discussed mean effective cylinder pressure and ways to measure or calculate it. When we consider the importance of the relationship between MEP and engine performance, we have to acknowledge where that pressure came from. It comes from the combustion (reaction) of the air and fuel mixture pushed into the cylinder on […]

## The Complete Guide to Brake Horsepower and Torque

Inventor James Watt first coined the term horsepower in 1780. Accounts vary as to how he came up with it, but the generally accepted version involves trying to develop a method of calculating the amount of work performed by a draft horse operating a pump to remove water from a coal mine. Watt had modified […]

## Understanding Piston Speed in High-Performance Engines

Piston speed generally refers to the average or mean speed of the piston as it moves up and down in the cylinder bore during each crankshaft revolution. Since the piston actually comes to a complete stop at the top of the stroke (TDC) and at the bottom of the stroke (BDC), its speed and acceleration […]

## The Complete Guide to Engine Displacement

Engine displacement is the most common math calculation. Displacement is the size or volumetric capacity of an engine expressed in cubic inches, cubic centimeters, or liters. Here in America we typically work in cubic inches while the rest of the world uses the metric system. I discuss appropriate conversions later in this chapter. Displacement is […]