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Old 08-26-2012, 12:39 PM   #14
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Quote:
Originally Posted by LAP1DOUG View Post
Perhaps the ultimate solution is dry sump system. Those positive displacement scavenge pumps can pull a lot of vacuum for crankase ventilation, and a properly configured oil tank is a great air-oil separator.

Speaking of which, a guy that I autocross with who has a 2007 Carrera S told me today that the Carrera S model in particular has a dry sump system. I thought all M96 / M97 / 9A1 engines all had the same pseudo-wet sump.
Sorry, but having run several dry sump engine setups over the years, I can assure you that you still need an auxiliary vacuum source (read a belt driven vacuum pump) to properly evacuate the engine case. The dry sump pumps, even a multiple stage units, do not create enough case vacuum to do the job.

As for your autocross guy, his 2007 Carrera S has the exact same AOS setup and wet sump that you and every other M96/97 does……………
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Last edited by JFP in PA; 08-26-2012 at 12:43 PM.
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