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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > AUDIO/VIDEO + BLUETOOTH + Electronics/Alarm/Software > The big 3 upgrade



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      01-24-2021, 07:15 AM   #1
J0K3R5
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The big 3 upgrade

Has anyone done the big 3 ?

Looking for some diy or pics please.
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      01-24-2021, 12:19 PM   #2
ctuna
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What do you mean Big 3?
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      01-24-2021, 12:32 PM   #3
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Quote:
Originally Posted by ctuna View Post
What do you mean Big 3?
This upgrade replaces or augments three key cables in the electrical system with 1/0 or 4 gauge wires: the battery ground to chassis wire, the chassis to engine block wire, and the alternator plus to battery plus wire.
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      01-24-2021, 02:40 PM   #4
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Quote:
Originally Posted by J0K3R5 View Post
Has anyone done the big 3 ?

Looking for some diy or pics please.
Not on most Exx cars. the IBS will not work properly. These cars are VERY touchy when you start jacking with power and ground lines.

Anyways, the battery is in the trunk, your amps are (most likely) in the trunk. Very little need to upgrade them, run the needed power and ground and you will be fine.
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      01-24-2021, 06:02 PM   #5
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Thankyou
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      01-26-2021, 08:56 AM   #6
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If you use digital amps you should have no trouble. I was running above 2000 Watts and I could not get the lights to dim at all.
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