• From Wikipedia

    http://en.wikipedia.org/wiki/BMW_M10

    As the BMW M12, the engine is also one of the most successful engines in racing.[citation needed] Starting with the European Touring Car Championship, it was also used in Formula Two and in the Deutsche Rennsport Meisterschaft, where it was turbocharged by Paul Rosche according to FIA Group 5 rules.
    The M12 went on to Formula One, winning the 1983 championship for Nelson Piquet and Brabham — something which very few 20 year old road car engine designs accomplish. The same applies for the rise in power: twentyfold from 75 hp (56 kW) to about 1,500 hp (1,100 kW).
    The BMW S14 engine for the first BMW M3 was based upon the M10 block. In the M3, the M10 block design is still winning races today.

    Not being funny but wikipedia is hardly the be-all & end-all of knowledge. The info is only as accurate as the person who wrote it.

    On a similar subject, I have read articles about F1 from this period when they were running 1.5l turbo'd engines. The article said that many teams used "grenade engines' for qualifying on which they just turned the wick up on the turbo to get it to produce maximum power for an out-lap, fast lap and then an in-lap and then it was ready for a skip.

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