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      10-10-2019, 11:33 AM   #34
n55david
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Drives: 2017 m240i, 2015 X3 x35i
Join Date: Aug 2018
Location: Michigan USA

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2017 m240i xDrive  [0.00]
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Quote:
Originally Posted by johnung View Post
Sorry it was a hassle for you. Ironically, Kies is doing my installation. I calculated, from pipe diameter measurements that were posted, that the Pure Turbos Inlet is 42% larger at that stock constriction point. I'm curious why that would translate into a noticeable sound volume difference. Perhaps your aftermarket intake is amplifying the sound so that you notice it.

I've got the M Performance intake which maybe sounds a little louder than stock because it has an extra air intake hole in the bottom of the air filter box. (That hole faces forward.) I use a drop-in aFe Pro Dry filter. Now I'm curious to see if I notice any sound difference.

Please post before and after logs if you can. I'm very curious to see if you have the same increase in MAF readings and how much they differ from 5000 RPMs on up. I haven't recorded a log but I may give it a try so that I have some "before" data before my installation.
You may not notice much of a sound difference with the stock air box.. too much built in sound baffling.

Logs are above.. as you can see, my results were useless.
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2017 m240i xDrive 10.99@122.86mph bootmod3 stage 2+ ots
2015 335i xDrive 10.95@124.99mph w/bm3 - SOLD
2015 X3 x35i pwg 12.96 catless w/bm3 stage 2 93 ots
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