Interesting

[Steve A]

This is worth a look https://www.youtube.com/watch?v=sJ3L-E-ufYo

[Tuga2112]

the channel does pretty good tests. i will have a look later.

for those who like to watch in the borum without being redirected.

[Steve A]

My motivation behind posting this video is, because of the poor state of my compressor wheel (see below ).
Having owned the Elan a number of years, this is the second time the turbo's come out for "maintenance work".
We all know how well the K & N air filters flow, but judging by the damage I have, it comes at a cost.
Yes I clean and oil my filter as recommended, but when my Turbo goes back together it will be protected
with a decent paper filter.