One for the engine experts here;

I'm in Europe and the 2.0 LSJ Ecotec is here delivered by Saab as the B207 with a turbo. Now it apears to be that this 2.0 Ecotec engine (LSJ/ Saab B207) has/had 2 different crank designs in it's life...
The early ones, US LSJ + B207 till 2007, came with a 1/2 counterweighted forged crank (4 weights), but the B207 engines from 2007 till 2011 have a fully counterweighted 8CW crank...
Not sure if this later 8CW Saab B207 version is a forged or cast item...
(The newer 2.0 LNF has the same forged 4CW crank, but with a slightly different triggerwheel.)

So, besides the overall weight issue, which design is better for a modified 7,5-8K SC engine? Read that most stock high rpm engines (Honda like etc.) tend to all have a fully counterweighted crank to reduce crank vibrations and bearing life.

So, which one to use? The forged 4C or the (maybe cast) 8CW version?? :wacko:

 

well the 4cw lsj crank would be a better choice in my opinion. cuz its light.
just have the entire rotating assembly balanced