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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 02-26-2004, 07:21 PM   #1 (permalink)
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my lights go dim when the car is under pressure for example the windows or when the heating is on , whats the story , regulator or alternator or battery
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Old 02-26-2004, 07:36 PM   #2 (permalink)
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too much stress on the alternator. my car does the same thing.
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Old 02-26-2004, 07:40 PM   #3 (permalink)
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Ok thanks furious
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Old 02-26-2004, 11:40 PM   #4 (permalink)
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do have a lot of audio equipment in the car? If you do, adding a cap will help a lot. If not, you'll either need a new alternator or have your current one rewrapped to provide more amps.
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Old 02-27-2004, 06:49 AM   #5 (permalink)
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1000 watts im pushing out , whats a cap????
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Old 02-27-2004, 08:08 AM   #6 (permalink)
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it is a capcitor like a small battery that stores electricity for heavy bass notes or when u need extra power u can get them at crutchfield .com here is the linkcruthchfield

also i would go with a bigger alternator this would help a ton not to difficult to install either also lighting also has a special battery made for audio stuff it can bewired inseries with your old battery or can just replace it if u had two batteries a capcitor and a 150 amp alternator your car would never dim again
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Old 02-27-2004, 12:56 PM   #7 (permalink)
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a 1 or 1.5 farad cap would almost or totally eliminate the power draw issues. Basically you need .1 farad per 100W. the smallest caps are around .5, or 500W. You need a minium of a 1 farad, but theres nothing wrong iwht overkill either. Im only pushing around 900W with a 1.5.

They install between the amp and the battery and the amp draws power from the cap and battery simultaniously. When the battery can't keep up, the cap kicks in and sends more juice, so you end up with a higher battery charge and a less stressed alternator.

I used some of the factory CD changer brackets and modified them and made a custom mounting bracket for mine.
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Old 02-28-2004, 01:01 AM   #8 (permalink)
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kinda odd you are pushing 1000 watts (you must have some nice equipment) and dont know what a cap is. not dissing just saying its odd.
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Old 02-28-2004, 02:16 PM   #9 (permalink)
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i have a 1 farad cap in my car. its ment to store energy so when the system (the subs) kick hard and take lots of energy the capacitor has stored energy to use instead of putting such a strong stress load on the charging system.
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Old 02-28-2004, 04:12 PM   #10 (permalink)
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thanks alot guys much appreciate the help. Just to let u know Spieluhr , i got the new sony head unit with memory stick etc, there is so many gadgets in it , sony had no place for an internal amp , so for the radio to work i had to buy the 1000 watt
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Old 02-28-2004, 07:34 PM   #11 (permalink)
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to upgrade your charging system check the FAQ forum , i posted a thread about it.
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Old 02-29-2004, 03:46 PM   #12 (permalink)
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Thanks Furious
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