LS1 fans: Alternator pulley?

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11-18-2010, 06:52 PM

#11

black00chev

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wondering the same myself... have LS1 fans waiting to go on with BBP harness but i currently have just a 400w system and gonna eventually go to 600w and wondering if stock alt can handle it or bigger.

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11-18-2010, 07:46 PM

#12

budhayes3

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I'm running the 05 efans with a 145amp alternator, and tdrumm used to have 05 efans with a 105amp alternator...or trucks reacted exactly the same when the fans hit on high with the ac on.

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11-19-2010, 03:00 PM

#13

badz24s

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RPO code for 145A alt?

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11-19-2010, 05:08 PM

#14

MikeGyver

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The only problem I had with my 105A alternator and e-fans was the headlights went brown when the fans kicked on, and the alternator had a little fire in it when it failed. Other than that, it almost kept up.
It seems like the OEM fans must not draw as much amperage as my Spals.

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11-19-2010, 05:23 PM

#15

budhayes3

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Quote:

Originally Posted by MikeGyver

When both fans come on high (when ac compressor engages), my lights will dim and voltage will just dip for a second. It used to be worse when I had my old PCMforLess tune, but I told Justin about it when I ordered my BlackBear tune and he seemed to fix it up pretty good