Found this….
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 its a good read http://www.mazdamaniac.com/tech/SAE_20920677.htm if its in the wrong place please feel free to move. 8) 
 
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 yeah that's a good read… he was a big member to mx-3.com a long time ago... lots of good info on his site in general 
 
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 :shock: Great reading on the research and development 
 of the V6 Mazda motors…...........