F30 N20 Alternator upgrade help

LittleBlackHawk · 09-27-2015, 10:40 AM

I have a 170A alternator in my 328i and i plan to add a AMP for my stereo system and upgrade all 4 speakers + 2 tweeters and 2 subs.

I also plan to upgrade my poor little 400W radiator cooling fan to 600W or preferably the 850W fan.

However, i am afraid that my alternator might not be able to support the upgraded parts, and i am wondering if i could just buy a 210A alternator and swap it with the poor little 170A one? i know it is quite straight forward on the old cars, but since BMW's computer is managing so many devices now, not sure if alternator is also governed by the ECU now, and make it not a straight froward upgrade. Also would the existing wiring able the stand the extra power going through them? I hope BMW doesn't use different wiring harness for different alternators. Thanks!

rustyminded · 09-27-2015, 06:19 PM

there was this tuning company which i can't remember there name but emailed them quit a while and they replied along with intercooler and piggyback they have auxiliary fan 850watt which i didn't understand why would i need it since it only works when engine is hot or when ac is on. so i cared less about it

LittleBlackHawk · 09-28-2015, 09:45 AM

ya, the main purpose is the keep the engine cool while it's hot. Not sure if AC is also related to the cooling fan. but before one could run 850W fan, i think the 210A alternator is required.

rustyminded · 09-28-2015, 10:42 AM

you can check in real oem on 335i cuz i guess it has the 850watt fan

LittleBlackHawk · 09-29-2015, 03:05 AM

yes, 335i has the 850W, but my problem is that my alternator is the 170A version which i don't think is powerful enough to run the 850W fan. I am told from other member in the forum that the alternator is also managed by the ECU and not a simple swap and done upgrade. Guess i just need to give it up on this cooling fan upgrade.

rustyminded · 09-29-2015, 07:37 AM

I found the mail that was his reply :

"Pricing without tax and shipping.

- Inter cooler 714,-- €
- Additional Cooling Kit (depends on your VIN) 600,- to 1.600,-- €
- Larger Vent. 380,-- €
- LSD (here we have professional multi disc LSD´s, no torsion toys) 2.300,-- €

BR
Peter"

Here is the link to their website

http://www.tuningwerk.de/tuningwerk/...E6Plnsw3s1Xw7w

LittleBlackHawk · 09-29-2015, 11:13 AM

Hi Rustyminded, thanks for the info, i will send them an email to check the possibility.

09-27-2015, 10:40 AM	#1
LittleBlackHawk Private First Class 35 Rep 101 Posts Drives: F30 --> E89 Join Date: Jun 2015 Location: Asia iTrader: (0)	F30 N20 Alternator upgrade help I have a 170A alternator in my 328i and i plan to add a AMP for my stereo system and upgrade all 4 speakers + 2 tweeters and 2 subs. I also plan to upgrade my poor little 400W radiator cooling fan to 600W or preferably the 850W fan. However, i am afraid that my alternator might not be able to support the upgraded parts, and i am wondering if i could just buy a 210A alternator and swap it with the poor little 170A one? i know it is quite straight forward on the old cars, but since BMW's computer is managing so many devices now, not sure if alternator is also governed by the ECU now, and make it not a straight froward upgrade. Also would the existing wiring able the stand the extra power going through them? I hope BMW doesn't use different wiring harness for different alternators. Thanks!
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09-27-2015, 06:19 PM	#2
rustyminded Major 248 Rep 1,436 Posts Drives: BMW 328i Join Date: Nov 2012 Location: C iTrader: (0)	there was this tuning company which i can't remember there name but emailed them quit a while and they replied along with intercooler and piggyback they have auxiliary fan 850watt which i didn't understand why would i need it since it only works when engine is hot or when ac is on. so i cared less about it
	Appreciate 0 Quote

09-28-2015, 09:45 AM	#3
LittleBlackHawk Private First Class 35 Rep 101 Posts Drives: F30 --> E89 Join Date: Jun 2015 Location: Asia iTrader: (0)	ya, the main purpose is the keep the engine cool while it's hot. Not sure if AC is also related to the cooling fan. but before one could run 850W fan, i think the 210A alternator is required.
	Appreciate 0 Quote

09-28-2015, 10:42 AM	#4
rustyminded Major 248 Rep 1,436 Posts Drives: BMW 328i Join Date: Nov 2012 Location: C iTrader: (0)	you can check in real oem on 335i cuz i guess it has the 850watt fan
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09-29-2015, 03:05 AM	#5
LittleBlackHawk Private First Class 35 Rep 101 Posts Drives: F30 --> E89 Join Date: Jun 2015 Location: Asia iTrader: (0)	yes, 335i has the 850W, but my problem is that my alternator is the 170A version which i don't think is powerful enough to run the 850W fan. I am told from other member in the forum that the alternator is also managed by the ECU and not a simple swap and done upgrade. Guess i just need to give it up on this cooling fan upgrade.
	Appreciate 0 Quote

09-29-2015, 07:37 AM	#6
rustyminded Major 248 Rep 1,436 Posts Drives: BMW 328i Join Date: Nov 2012 Location: C iTrader: (0)	I found the mail that was his reply : "Pricing without tax and shipping. - Inter cooler 714,-- € - Additional Cooling Kit (depends on your VIN) 600,- to 1.600,-- € - Larger Vent. 380,-- € - LSD (here we have professional multi disc LSD´s, no torsion toys) 2.300,-- € BR Peter" Here is the link to their website http://www.tuningwerk.de/tuningwerk/...E6Plnsw3s1Xw7w __________________ F30 328i - 8 auto.. JB4-EWG harness, OCC, Injen Intake, AFE Scoop, AFE dp, AA axle-back - H&R springs, H&R Rear SB, Front Strut, F&R BMS spacers..
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09-29-2015, 11:13 AM	#7
LittleBlackHawk Private First Class 35 Rep 101 Posts Drives: F30 --> E89 Join Date: Jun 2015 Location: Asia iTrader: (0)	Hi Rustyminded, thanks for the info, i will send them an email to check the possibility.
	Appreciate 0 Quote