Book excerpt: This comprehensive book is dedicated to the revolutionary Porsche 911s built between 1989 and 1994, known to aficionados and factory insiders as Auftragsnummer 964 (project number 964). Porsche 911 Enthusiast's Companion covers Carrera 2, Carrera 4, and Turbo models from 1989 to 1994. Whether you're a 964 owner, a prospective buyer, or a Porsche workshop technician looking for 964 information, this is an invaluable addition to your technical library. This is a buyer's guide, a maintenance and repair handbook and a technical reference all wrapped into one. It is full of tech tips, service hints and system descriptions, plus lots of DIY repairs collected from all around the world. You will also find an extensive section on 964 race cars and their drivers. This is a book for the hands-on enthusiast. It provides the information necessary to maintain your 964 to factory standards, gives you the assurance to speak knowledgeably to your service professional, and can provide you with the hot setup for the track. To bring you this authoritative volume, author Adrian Streather has scoured the globe in search of enlightened information and technical procedures for the 964. Almost every conceivable question you could ask about this revolutionary 911 can be answered using this book. Technical highlights: * Worldwide coverage of 964 models (USA and ROW). * Year-by-year, model-by-model analysis of 964 technical highlights, includ ing Turbo models. * Tips on how to purchase the best car, things to look for during the test-drive, and how having a prepurchase inspection can potentially save you thousands of dollars. * Detailed technical information on vehicle systems such as: o Dry-sump engine lubrication. o Motronic engine management (DME). o Turbo fuel injection (CIS). o Tiptronic transmission control. o Porsche Dynamische Allrad Steuerung (PDAS). o Antiblocking system (ABS). o Air-conditioning and heating. * Dozens of DIY repairs and tips such as: o Valve adjustment. o Secondary distributor drivebelt replacement. o Engine removal and installation. * In-depth maintenance schedules and instructions, including maintenance notes for Turbo models. * Troubleshooting procedures and advice.