View Single Post
Old Wed, Jul-06-2016, 11:37:39 PM   #25
Registered User
Kirbius's Avatar
Join Date: May 2011
Age: 40
Posts: 331
In the garage:
Reputation: 0 Kirbius is on a distinguished road


Default Re: OEM Plus Eurospec M3 Build

Originally Posted by M_Parallel View Post
Same here. I wouldn't change it with the clutch fan in place. Neither if I would track it or being in a hot climate. 100 degrees is 100 degrees nontheless. The only thing is that the temp would be reached sooner, but at the same time, the fan would kick in sooner as well, so it doens't matter.
Ok lets go through the cooling system operation.

The thermostat determines engine operating temperature, not the fans. The only reason you have a fan, either electric or clutch, it to get airflow OVER the radiator; even the clutch fan will free spin if the temperature is too low for its predetermined engagement point, of which an electric fan is no different

The sender is at the cool (supply) side of the radiator, so what it is sensing is NOT the engine temperature as per what the gauge/ECU, but rather the coolest part of the system. So if the coolest part of the system is getting hot enough to engage at 90C, you can guarantee the engine is easily 20C above that, consequently at 99C it will be substantially hotter.

Even here in 36C days it does not come on all the time, and generally will only come on after sitting for over 5/10mins with no airflow over the radiator. So what this does is allow airflow over the radiator sooner than it would otherwise when the air is stagnant. Clutch fans do the same job obviously, but it helps augment the clutch fan (which may not be in peak operating condition as it is >20yrs old) in allowing more airflow over the radiator when air is too hot (when aircon condenser is operating generating a lot of heat) or when it is not enough to dissipate heat over the radiator.

It will NOT make the engine run cooler, thats not a fans job, but it will allow better airflow over the radiator for the rest of the system to operate efficiently when it is required.

Forget all about M5x cooling systems, the S engine systems are a much better design

1996 Evo S50B32 - Boston Green on Modena - Slicktop - Al doors - PDC - JBR 5kg F/W - Clutchmasters FX400 - Mason SS Clutch pedal - UUC Evo3 SSK w/DSSR - PWR radiator - DrVanos o/haul - Full AKG 75D bushing & mount set - AP delete - Fan delete - X-brace - BC Racing C/Os 8k/10k - Whiteline 27mm ARB - ARC8 17x8.5 - Nitto NT01 - APEX 75mm stud - Walbro GSS342 - Schroth Harness - TMS rear control arms - Hawk HP+ pads - GT splitter - GT 4pc wing - Momo Monte Carlo - Racechrono TS - RaceDAC - RR Strut Brace - Proflow PS res + AN lines - VDO gaugeset - E46 330 rack - VAC oil pump upgrade - ARP conrod bolts - Magnaflow spun cats - MAC Motoren Airbox - AlphaN - ATI/VAC HB - 3.91 210 -
Jump to top Kirbius is offline   Reply With Quote