Alternator for '05 ELec Fans

[jethro_3]

I read the threads about needing to change the alternator from the 105 Amp to something larger when you install the '05 elec fans. I found an alternator that is rated at 130 Amp, is that enough? I had to prove to myself that the larger alternator was needed so I pulled my LT1 fans and placed the '05 fans near the rad. My harness is from Nelson so just A/C the alternator keeps up, just temp (both fans low) the alternator keeps up, but with A/C and temp (both fans high) the volt gauge goes to 11.5 Volt real fast and the A/C will not stay on. Interesting.

So what is the minimum amp alt needed to run the fans and still keep the system running properly? Thanks

[Hit Man X]

Yes, I run the 130A on my truck. It was all that was around before GM began to produce the 145A. Output is about 60-65A at idle w/ the 130A versus 40-45A at idle with the 105A stock.

You will need a longer belt also.

[jethro_3]

Do you have any other aftermarket stereo or other lights to draw on the system? Night time lights and A/C no problems? Thanks for the post.

[Hit Man X]

Originally posted by jethro_3@Jun 9 2005, 08:26 PM
Do you have any other aftermarket stereo or other lights to draw on the system? Night time lights and A/C no problems? Thanks for the post.

Yes, I have a multi amp stereo (over 800rms) and my truck is an LT package.

Prior the 105A would discharge during the day with just the A/C on as well as the fans, the 130A should be required with e-fans.

[jethro_3]

Thanks, I think I have found a good deal on a 200 amp if I can't snag that 130 for a good price.

[Hit Man X]

Make sure it's a good 200A some places build junk ones, going cheap will only cost you in the end. I have a nice one from Alterstart on my F150, makes excellent power.

[SlammaDingdong]

Originally posted by Hit Man X+Jun 10 2005, 12:35 PM--><div class='quotetop'>QUOTE(Hit Man X &#064; Jun 10 2005, 12:35 PM)</div>

<!--QuoteBegin-jethro_3

@Jun 9 2005, 08:26 PM
Do you have any other aftermarket stereo or other lights to draw on the system? Night time lights and A/C no problems? Thanks for the post.

Yes, I have a multi amp stereo (over 800rms) and my truck is an LT package.

Prior the 105A would discharge during the day with just the A/C on as well as the fans, the 130A should be required with e-fans.[/b]

No doubt a 130A or higher should be a prerequisite for e-fans&#33; I added a FAL #108 pusher fan (6A draw) to supplement my existing LS1 fans and the 105A alt is not cutting it period. Note all I have is the base OE sound system (I use that term loosely).

We&#39;ve been having this goofy monsoon weather here in MO where it pours sheets every dang afternoon. When the windshield starts to fog, and running the defrost blower w/ the A/C on is the only way to clear it, my charge indicator drops to about 13.5A. With lights on (especially if towing a trailer), it&#39;s even worse. Not good&#33;

Oh well, next big buck up for Slamma is also for a bigger alt.

Jeff

[SlammaDingdong]

Originally posted by Hit Man X@Jun 12 2005, 02:10 PM
Make sure it&#39;s a good 200A some places build junk ones, going cheap will only cost you in the end. I have a nice one from Alterstart on my F150, makes excellent power.

Quick Start makes some decent units (from what I&#39;ve heard anyhow). They are the AD-244 type. You can find these at http://www.alternatorparts.com/ad_al...order_page.htm.

Upgrading the charge wire seems to be important for these higher output type alts. What to you think Hit Man, at least 4-gauge?

[Hit Man X]

Originally posted by SlammaDingdong@Jun 13 2005, 08:15 PM
Upgrading the charge wire seems to be important for these higher output type alts. What to you think Hit Man, at least 4-gauge?

I have the OE fuseable link on there still with my 130A, it&#39;s fine. But for up to 160A I&#39;d go 4awg, over that I&#39;d look for 2 or 0awg. Better safe than sorry.

[jethro_3]

I ran across the Second Alternator setup shown on a Hummer, I call that overkill. I guess in the Army version they run two alternators and push like 600 plus amp ? Anyone even come close to needing the second alt???

Thanks for your input Hit Man X and Slamadingdong.