[Vwdiesel] Re: [Audi-VW-Diesels] Head Gasket options?

Lee Hillsgrove hillsgrove at adelphia.net
Sun Jun 23 00:28:47 EDT 2002

>  SAAB has variable compression???

  Yep, they pivot the cylinders on one side and use an actuator to lift or
lower the other side. The gap formed where it pivots is sealed with a
bellows assembly.
 The best of both worlds - higher compression off-boost for better power and
lower compression when it is boosting to reduce detonation.
 SAAB was also playing with single-electrode spark plugs, where a projection
on the top of the piston would form the negative electrode, and the spark
would fire directly to it. Apparently a layer of aluminum oxide would form
and help prevent erosion of the piston. I dunno about that idea.....


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