First published in 1981 and regularly reprinted ever since, this remains one of the most comprehensive works available to the enthusiast engine tuner and race engine builder. Drawing on the author’s many years of practical experience in tuning and modifying high-performance road, rally and race engines, it sets out in detail the many principles involved in tuning four-stroke engines. This revised and substantially expanded fourth edition incorporates new information covering the adoption in recent years of finger-follower cam follower arrangements on OHC and DOHC engines, and the tuning implications of recent developments in fuel and oil technology. From air and fuel, through carburation, ignition and fuel injection systems, cylinders, camshafts and valves, exhaust systems, drive trains, cooling and lubrication, all principal aspects of engine operation are explained and analysed. Detailed modifications and improvements are suggested and described in the author’s practical, down-to-earth style, making this book essential reading for anyone involved in developing and building high-performance engines.

‘It will have you tinkering under the bonnet for hours in search of those vital extra horses’
Motoring News

‘You’ll struggle to find a better guide’
Bike

First published more than 30 years ago and in continuous print ever since, this remains one of the most comprehensive references available to the enthusiast engine tuner and race engine builder. Drawing on the author’s many years of practical experience in tuning and modifying high-performance road, rally and race units, every aspect of an engine’s operation is explained and analysed. Detailed modifications and improvements are suggested and described in the author’s practical, down-to-earth style, making this book essential reading for anyone involved in building high-performance engines.