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      09-16-2009, 07:09 AM   #68
atr_hugo
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Drives: '13 135i
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Red, thanks for the info on the triple-turbo four. Your description matched what I suspected, that it would be two single stages and a combined stage. I think if I were motivated enough I could tell what cylinders are paired based on firing order but I'm being lazy today. ; -)

Speaking of high revving, I read something recently that talked about problems with gasoline direct injection and building RPMs (which the non-DI S54 or Honda's S2K motors do - heck even a well built small block Chevy can pull 9K RPMs ; -). Let me see if I can find that - it may be buried in the Bosch Automotive Handbook somewhere.
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