Quote:
Originally Posted by oeron
Thanks, i'll keep that in mind. Guess first thing I'll do is to fit my cold air intake (didn't had the time unfortunately), I'm really excited and curious what it's gonna be like. I'll run a dyno test and share the results, but sure it's gonna make a small difference.
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It depends on how warm air the engine is breathing before your modification. I remember doing some measurements inside the intake of my old E30 M40 318i. When driving at anything over 30 km/h (much power under that speed means only wheelspin anyway), the intake temperature was never more than 2 degrees higher than ambient air temperature. This was with a completely open cone intake.
Less than 2 degrees means a negligible power loss. Any restrictions to block off heat, would do more harm than good due to pressure loss.
I don't know if N13 is like that or not, but I would not expect noticeable gain from a modified intake. The engineers in München know what they are doing.