high output alternator

installmd · 07-20-2007, 11:22 PM

I am installing a multi amp system in my friends E92, and have calculated the maz potential current draw at about 150A. I am having trouble finding a high output alternator, or someone that can re-wind the stock one to a higher output.

Any Suggestions?

OniKoroshi · 07-21-2007, 08:47 PM

Have you checked out Stinger alternators?

nhhiep · 07-22-2007, 02:25 AM

I think you will be fine with stock alt. I have a 325 (which may has a smaller alt) and I am using a 1500w rms mono amp with no problem.

bigjae1976 · 07-22-2007, 11:49 PM

You should be good on the stock alt. Most amps have a regulated power supply so you're not losing a lot of output.

But check your voltage with everything on and the stereo on full blast. You shouldn't get anything less than 12.6V.

If you do, then you do need to upgrade your electrical system. I do the battery first. Kinetiks work pretty well...check out ebay.

Then look into an alternator rebuild. There are a couple of companies...excessive amperage and ohio generators are the 2 that I use. Most high output rebuilds will run between $300-$400.

installmd · 07-24-2007, 08:59 PM

thanks,

the last system i put in for him was in his RSX, which had the higher fastory alt, but we still needed to upgrade it to 165A. even then with the second battery during really heavy play time, a little light diming would occur. Alt is easy to get to, so i am going to start with a second stinger deep cell batt on an isolator. 1900W RMS with none being class D can pull close to 150A at max draw. shouldn't ever get there, but we'll see.

07-20-2007, 11:22 PM	#1
installmd Private 6 Rep 48 Posts Drives: 2006 E90 330I - Monaco Blue Join Date: Jul 2007 Location: CT iTrader: (0)	high output alternator I am installing a multi amp system in my friends E92, and have calculated the maz potential current draw at about 150A. I am having trouble finding a high output alternator, or someone that can re-wind the stock one to a higher output. Any Suggestions?
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07-21-2007, 08:47 PM	#2
OniKoroshi Private First Class 3 Rep 112 Posts Drives: 08 535i Join Date: Jul 2007 Location: San Diego iTrader: (0)	Have you checked out Stinger alternators?
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07-22-2007, 02:25 AM	#3
nhhiep Captain 90 Rep 862 Posts Drives: bmw Join Date: Jan 2006 Location: Denver, CO iTrader: (0)	I think you will be fine with stock alt. I have a 325 (which may has a smaller alt) and I am using a 1500w rms mono amp with no problem.
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07-22-2007, 11:49 PM	#4
bigjae1976 Major General 1609 Rep 8,073 Posts Drives: 11 E90 M3 Individual Join Date: Mar 2006 Location: Houston, TX iTrader: (22) Garage List 2004 BMW M3 [6.33] 2011 BMW E90 M3 [6.83] 2013 BMW 328i [6.67]	You should be good on the stock alt. Most amps have a regulated power supply so you're not losing a lot of output. But check your voltage with everything on and the stereo on full blast. You shouldn't get anything less than 12.6V. If you do, then you do need to upgrade your electrical system. I do the battery first. Kinetiks work pretty well...check out ebay. Then look into an alternator rebuild. There are a couple of companies...excessive amperage and ohio generators are the 2 that I use. Most high output rebuilds will run between $300-$400. __________________ 2018 F30 320iX Melbourne Red 2011 E90 M3 Monte Carlo Blue 2004 E46 M3 Imola Red 2000 E36/7 Z3 Steel Blue
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07-24-2007, 08:59 PM	#5
installmd Private 6 Rep 48 Posts Drives: 2006 E90 330I - Monaco Blue Join Date: Jul 2007 Location: CT iTrader: (0)	thanks, the last system i put in for him was in his RSX, which had the higher fastory alt, but we still needed to upgrade it to 165A. even then with the second battery during really heavy play time, a little light diming would occur. Alt is easy to get to, so i am going to start with a second stinger deep cell batt on an isolator. 1900W RMS with none being class D can pull close to 150A at max draw. shouldn't ever get there, but we'll see.
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