Old Nov 5, 2007 | 01:58 PM
  #7  
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cozmeister
More boost Igor!
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From: In my Cosworth
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The 205 YBD block was a development of the YBB 205 block. Included thicker walls and had bigger balls so it could be wound up to 500bhp.

The 200 block was a further development of the YBD 205 block, and included all the enhancements from it too.
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