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Old 01-06-2012, 02:20 PM
JoeFromPA JoeFromPA is offline
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Location: West Chester, PA
 
Join Date: Jan 2007
Posts: 1,734
Mein Auto: 01 M5, 08 535xit
I believe they use the starter (I'm not sure how you'd fire the next cylinder without using a starter to move the piston- the stroke goes fuel spray, compress, fire - so you can't simply ignite fuel that's sitting on the cylinder walls and you can't have it spray and compress without moving the piston - so no matter what you need a starter to get that going...)

Bear in mind it's not your typical ignition starter - a start/stop starter has much greater mass AFAIK
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01 m5 - 127k miles 11/2013....08 535xit - 94k miles
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