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compresion

  1. 1998 E38 728i loss of compression

    BMW 7 Series - Tech Talk For All Gen Of 7 Series
    hi i have a 728i with a m52 engine that has lost over 50% of its compresion garage has taken head off and discovered the problem was the valves and valve lifters. the lifters have over extended and opend the valves. i am looking for some insight to the cause of the problem. no point rebuilding...
  2. 2000 E46 323 - supercharge? lower compresion?

    Supercharging your BMW
    On a vauxhall forum (migweb) they turbo cars all the time, especially the redtops! When doing so they some times use double steel headgaskets to lower the compresion so that they can up the boost! I would imagine that it is the same principle for the supercharger? So if you have a 323 and a 325...
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