Thread: 328i N20 Tunes
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      11-13-2012, 08:45 PM   #47
MidgetInBikini
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Drives: 2013 E84 N20 28i
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Quote:
Originally Posted by bnekic View Post
From what I read the BMS is closed loop so adding modifications is fine. Also the stock ECU has knock detection so I'm assuming it would retard the engine if knock was out of control.

I'll be running the BMS, aFe intake and exhaust.
Another question from a newbie here. What is knock and knock detection?
What does retard the engine mean? Is it something like stall?