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3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

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Old 12-04-2004, 08:37 PM   #1 (permalink)
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guys!!! ghead . i have a problem. in my 98 i have an 80 amp alternator. i need some feed back from the people that have the zkw's. i went to my dealership and asked about projector headlights and such, so i could have them adjusted (the right height) once i got them in. and the bmw mechanic said he was worried about the fact that the projectors might be taking alota juice from the battery/alternator and making it work even harder. there are 3 sizes or whatever of alternator. if anyone has time to go check that would be awesome. there is a sticker on the alternator and the number is above the BMW roundel (spell check) i had to use a mirror and a flashlight to check what i had. there supposidly is a 120 amp and a 140 amp. so feedback would be great!! either the people who are running zkws w/ the 80 amp or whatever. thanx!!!!!!!!!!!!!!!!!! B)
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Old 12-04-2004, 09:17 PM   #2 (permalink)
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Can you check the wattage of current projector bulb and the stock bulbs?

Wattage divided by Volts = Amps and can give you a good indication of what the difference is between them.......
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Old 12-04-2004, 09:18 PM   #3 (permalink)
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Yes, ZKW's will draw a bit more current from your electrical system, but it's nothing to be concerned with. While upgrading to a larger alternator is a good idea, it certainly isn't necessary.

You'll be fine with what you have.
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Old 12-05-2004, 02:41 AM   #4 (permalink)
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i guess that is what my main question is...over time will my alternator start to die out, cuz it is charging the bat all the time? what size do you have. that was my main question from the beginning too. who ever has zkw's what alternator size do u have/ thanx

~dave
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Old 12-05-2004, 09:12 AM   #5 (permalink)
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Yes, over time your alternator will die out, but this is regardless of whether or not you add ZKW's. I'm almost positve I have a 90amp alternator (I will upgrade), and I have added an aftermarket amp, ZKW's, satelite radio...you get the idea.

Like I said, you'll be fine.
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Old 12-05-2004, 10:47 PM   #6 (permalink)
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Actually, they draw less. High beams and low beams in the zkws at 55W H1s. The stock NA spec at 85/65 if I recall correctly.
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Old 12-06-2004, 07:40 AM   #7 (permalink)
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Prez, you are correct. However, if these ZKW's are to be equipped with DDE, they will draw more than oem. Not much more but more.
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Old 12-06-2004, 07:23 PM   #8 (permalink)
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True.

I know I'm drawing less. No AEs and HID=35W and 2.1A.
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Old 12-06-2004, 07:38 PM   #9 (permalink)
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all i know is ive chanded an alterntor out in my other car 2 years in a row! haha good thing i ditches the subs in the new car i coulkdnt stand those damn things anymore!

David
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