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Old 01-07-2016, 04:34 PM   #3 (permalink)
EcoModding Apprentice
Join Date: Oct 2008
Location: up north
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ferd. porsche tried it too...

Ferdinand Porsche tried something similar, with some pistons super charging other pistons.

I think it was given up as overly complex and had overheating problems.

I just bought a Mazda 3 with the Skyactiv system. Instead of typical gasser compression ratio of 9:1 or 10:1, the US version has 13:1, and the euro or japanese version is 14:1.

To prevent engine destroying pre-ignition, they use active changes in the cam timing.

So far, it works a treat.
2004 VW TDI PD on bio

want to build 150 mpg diesel streamliner.
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