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      12-07-2013, 05:13 PM   #40
Hujan
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Drives: M3
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Quote:
Originally Posted by nicknaz View Post
Realoem and other posters suggest Z435is has the same 600W radiator fan as the Z435i.

I haven't looked up 135is

I would source from 1M/335is since those for sure have the 850W radiator fan. "should" be plug and place since I believe the 850W and 600W fan have the same form factor

Yes, high flow DP, FMIC, radiator fan and maybe lower thermostat seems like a solid play for more HP and lower temps.

I am speculating (and going off topic) next.... I believe the high oil temps in the N54 is to combat the carbon buildup on valvetrain that can happen in direct injector engines (S65 is not direct injection). There are a lot of articles about carbon build up around.

Check out this article that suggests hotter temps cause deposits to burn off

"The bulletin also suggested that harder driving would result in hotter intake-valve temperatures, causing deposits to burn off."

Read more: http://www.roadandtrack.com/motorhea...#ixzz2mTPWMlBg

http://www.edmunds.com/autoobserver-...-adopters.html

FWIW, if I were to do all these oil cooling mods I would be sure to add oil catch can too.
Great points. The carbon burn off is a good explanation. Carbon buildup was a huge problem in the Mini world as well. A lot of guys sweared that hard driving would reduce the issue. Guess there is some merit to it.

So my mod list is starting to shape up:
  1. 850 W fan from 335is/1M
  2. BMS oil catch can
  3. BMS filter
  4. BMS oil thermostat
  5. AR race cat downpipes
  6. Evolution Racewerks FMIC w/ charge pipes
  7. Forge diverter valves
  8. Tune
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