Underdrive Pulley and Big Stereo

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Nov 24, 2012 | 07:28 PM

dirtbag

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From: St. Louis, MO

Underdrive Pulley and Big Stereo

Anyone have issues with the the battery charging correctly after installing an underdrive pulley with a big stereo? I have 2600w of amps and an optima battery with a new alternator, but am afraid the battery will not be getting a good enough charge due to the slow spinning alternator. I do have a capacitor but it only helps so much when you are running a few thousand watts...

Nov 24, 2012 | 09:01 PM

Marc3.4V6

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From: San Diego

You need an overdrive alternator pulley.

Nov 24, 2012 | 11:51 PM

99Bluz28

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From: C. V., Kalifornia

Does your car have a M6 or A4 transmission, and is the amplifier 2600rms or max/peak power?

Nov 25, 2012 | 07:31 AM

dirtbag

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From: St. Louis, MO

Overdrive alternator pulley... K.

Car is an M6 and 2600 is the peak number.

Nov 25, 2012 | 08:02 AM

Undertow74

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From: South Carolina

i have no problems with my system and i have a 25% UD pulley. and i have 4 amps
(1 for front speakers, 1 for rear, then 1 for each sub) I also have a 6 farad capacitor and a higher amp alternator. No overdrive pulleys needed for me.