I've recently notice my N55 has been performing
quiet sluggishly. Daily driving has been less than
thrilling, the bimmer feels slow when flooring it.
During a couple of track events, on the straight aways
the car doesn't feel like it did before. Boosting
has not been optimal.
The bimmer's at bout 50k i'm FBO
with Procede Rev2.5 map 1108 no meth.
Here's what I found when checking up on
my mods - An oily mess on the charge pipe arm
going to the t-body!!! The oil residue was on the
charge pipe, the DME wires, the DME board, on the
t-body -- Immediately, problem found.
oily residue - all around the
started to clean the outside
but u can see the inside is oily - the sensor needs
I removed the charge pipe, wiped down
everything, removed the sensor shot it with
some crc cleaner. Clear'd the tune did
a run and was very happy. The N55 boost'd
properly on Map 1 and 2. Huge difference
The CP design using the C-Clip is prone
to leakage as you can see. I would recommend
to you guys out there to do some regular maintenance
and clean ur CP, CP sensor, MAF sensor as well.
I'm not knocking ER's CP, just sharing with you
how it's been holding up.
In the later day i'm going try to add a thin
silicone hose between the CP and t-body.
To help prevent any extreme oily messes.
Any of you have similar experience post up.
And on a side note - to continue on maintenance.
on the list to clean is the intake manifold / walnut shell
blasting. Will post pictures soon.