New Weber tech. book by Bob Tomlinson, of CB Performance in California. This book is mainly aimed at the Weber IDF carb. fitted to type 1, 2, 3 and 4 engines, but has smaller sections on IDA, DCOE, ICT, progressive 32/36DFAV, DCNF etc. Topics covered in 161 pages: Howcarburettors work, fitting, tuning, overhauling, jet selection & charts, troubleshooting, ignition timing, air filters, engine tuning. This is the most comprehensive manual available for fitting and tuningWeber carbs. onto VW engines – if you have Webers youll find it invaluable.