all kind time of day, it was succeeded to adjust on pressure 21psi, but corners of an advancing of ignition bad (there is a detonation) as extent of compression 8.8 it is a lot of, for normal control it is necessary to unclench the engine to 7-7.5, then it will be possible to adjust on more evil corners, and respectively to avoid a detonation. To put thick laying not to turn out as distance between cylinders very little, laying will simply blow, means only to do the piston under the order under smaller degree, or may be it is possible to pick up from something who possesses such information write please here the link to the sizes (parameters) of the native piston:
http://catalog.mahle-aftermarket.com...ilterid=965942