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      01-10-2019, 03:25 AM   #6
Martin30x
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Drives: 540i xdrive
Join Date: Nov 2018
Location: Halifax

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bms air intake. With open top. ....

The top of air filter is closed for a reason and intake of cold air coming from the front, thru channel.

The rule is simple, more hot air in intake = car loosing bhp, drive slower become more sluggish.

Thats why a car manufactures uses channel for intake from outside instead of inside engine bay...

Venturi and it carbon intakes are full made from front. Keep cold insulated as much as possible from engine, have dyno tested and proved.

Better bhp, better response.


K&N got drop in filters. (Direct replacment) its cheap.

Car is more responsive with it. Yes, you can turbo and its fraction of the stupid price of bms filter.

There is a reason why people are fitting far away filters like bms from engine. In current setup the filter sit on top of turbo. The mose hot place in entire engine bay....

I have seen many people complaning about "wird behaive" after driving for xx in x40i. With BMS

Beacuse hot air that car uses are getting to hot.

Beacuse of its location. Driving in summer will bring even more problems.

Like I said there is a reason why car manufactures takes cold air from.outside, why proper air intakes coming with proper piping to take that cold air from outside. Not inside engine bay... just like bms...did.
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