Here are some pics.
Also a big thanks for Charles from BMG Performance for doing the install and making my aluminum inlets.
Very nice, clean, oem looking.
Any reason for the front inlet pipe connect to the rear of air box outlet? I m guessing something to do with the angle of the rear turbo inlet or clearance?
Nice, now if someone could make an aftermarket airbox that fit this cover that would be pretty sweet. Definitely preferable to the typical pancake inlet route in front and behind the engine.
Any idea if the 335i and 135i are different with pipe routing and brace clearance? I'd love to do this.
Wonder about clearance for the PR coils.
Forgive the dusty engine bay (not mine), and the blue silicone bits which would have looked a lot cleaner in black, but this is my preferred setup all in all, stock-style airbox for the R turbo, with relocated front inlet while keeping the overflow tank and the vacuum canisters on the passenger side where they belong...
I am running dual 3" inlets on my personal vehicle FWIW...
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How is it a flow restriction? Seems to me that area squared is constant whether the silicone hose is round, oval, or whatever inbetween.The biggest restriction is the rear inlet, hence why I did want to route it between the rear of the engine and the firewall. Everyone with driver side silicone inlets has the rear inlet compressed that it’s a flow restriction.
How is it a flow restriction? Seems to me that area squared is constant whether the silicone hose is round, oval, or whatever inbetween.
Filippo
I understand this is a factor. If you are referring to this as your reasoning, may I ask if have performed the tests and calculations to determine actual loss and that it is significant, and significant being compared to the same measurements from a stock unit since obviously that would be the baseline? At this point, every aspect of the pipe's design effects the flow, which automotively speaking (so we don't move to other domains) is well understood with exhaust system design. Well aside exhaust pulse and hemholtz and what not - yeah it's rocket science.This is where fluid dynamic courses come into play. The area is the same, however airflow is moving at 300+ ft/s therefore boundary layers are created within the inner diameter tubing. The air is moving from the air filter to the inlet throat of the turbo's compressor housing. The squeezed area is located less than 6" from the compressor's inlet and air does not have enough time/distance to fully correct itself at these airflow speeds. At the end this squeezed area is similar as having a 1.5" to 1.7" diameter tube section at those 6".
Very nice, clean, oem looking.
Any reason for the front inlet pipe connect to the rear of air box outlet? I m guessing something to do with the angle of the rear turbo inlet or clearance?
Now just need to run a cool air feed hose/duct from left side fog light area to the air box inlet and you get cold ram air.