Tuning BLs A-Series Engine. By David Vizard
I think I know this book inside out after quite a few years owning minis, it's not your usual type of technical tuning manual as it's not full of 'techo baffle', Mr Vizard explains in easy to understand chapters why certain modifications work, and why some don't in conjunction with dyno graphs to prove everything he says. If you ever wanted to know the ins and outs of how an engine works I highly recommend this book even if you don't have an A-series engined car. Quite a big book at 488 pages but good value for money.