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      08-24-2018, 01:13 PM   #287
Bours
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Drives: 2011 335i x-drive LCI sedan
Join Date: Nov 2014
Location: Montreal

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Quote:
Originally Posted by Bigugly View Post
i dont need to explain volume efficiency and how a (correctly) ported head benefits practically any engine, there's countless google topics you can read up on that.
But any time you help stop a bottleneck, it helps overall.
ok found the convo with MMP they said ported head is very good and nets 30% more flow

i asked for ferrera valvetrain and they said i could rev to 8200 rpm with it on a n54 but not sure on a n55 what the dme limit is...

they said no point in doing valves if not doing ported head...


valvetrain upgrade nets only 4% more flow vs 30% for ported head..

they recommend i only do this if going huge turbo and bigger power goals....

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