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Old 11-05-2015, 04:51 PM #16
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Quote:
Originally Posted by piecesparts View Post
Slightly new to the Toyota world. Clarify big 3 for electrical, please.

Will the alternator upgrade work without it?
the big 3 upgrade isn't one that's specific to toyotas. It's replacing the battery ground to chassis wire, the chassis to engine block ground wire, and the alternator to battery positive wire with beefier gauge wires (usually 4 awg or bigger).

The alternator will work without it, but you probably won't see the full output of the alternator.
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Old 12-12-2019, 12:42 PM #17
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I know this is an old thread however my alt just crapped out and Im wanting to do the cs144 upgrade... Does anyone have any experience with this alt WITHOUT doing the big 3 upgrade? Is this a significant safety risk?

I am running a 650 watt audio amp 42" and 32" led bars and 6 small led cubes.. sometimes I use everything at once...
I have a battery voltage meter installed in my dash as well so I could potentially see any irregular voltage readings...

Thanks in advance
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Old 12-12-2019, 12:46 PM #18
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I've had a high output custom alternator that I got off ebay for more than 4 years now with no issues. Keep the old one as a spare. Caveat: I've done the big 3 upgrade.

Basically this:

HIGH OUTPUT 160AMP ALTERNATOR FOR TOYOTA 4RUNNER TUNDRA TACOMA 3.4L 101211-9590 | eBay
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Old 12-12-2019, 05:29 PM #19
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Quote:
Originally Posted by Yoda-runner View Post
I know this is an old thread however my alt just crapped out and Im wanting to do the cs144 upgrade... Does anyone have any experience with this alt WITHOUT doing the big 3 upgrade? Is this a significant safety risk?

I am running a 650 watt audio amp 42" and 32" led bars and 6 small led cubes.. sometimes I use everything at once...
I have a battery voltage meter installed in my dash as well so I could potentially see any irregular voltage readings...

Thanks in advance
Well, think of it this way:

The stock ALT fuse is 100 amps.
The stock alternator puts out a max of 80 amps.
The CS144 puts out up to 140 amps.

What's going to happen to that fuse? It's simple math. Gotta upgrade your wiring.
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Old 12-12-2019, 05:55 PM #20
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Alternator upgrade
Quote:
Originally Posted by weekendclimber View Post
I've had a high output custom alternator that I got off ebay for more than 4 years now with no issues. Keep the old one as a spare. Caveat: I've done the big 3 upgrade.

Basically this:

HIGH OUTPUT 160AMP ALTERNATOR FOR TOYOTA 4RUNNER TUNDRA TACOMA 3.4L 101211-9590 | eBay


That really is a good price if it lasts. You’ll pay around that amount for the 144 GM Alt unless it comes from a junk yard and it still needs adapted to the Toyota wiring. The factory alt is only capable of pushing just a hair over 40a at 600rpm. Headlights, brake lights and fan speed on speed 3 exceeds that without adding anything extra.


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Last edited by 19963.4lsr5; 12-12-2019 at 06:26 PM.
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Old 12-13-2019, 12:26 PM #21
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Quote:
Originally Posted by 19963.4lsr5 View Post
That really is a good price if it lasts. You’ll pay around that amount for the 144 GM Alt unless it comes from a junk yard and it still needs adapted to the Toyota wiring. The factory alt is only capable of pushing just a hair over 40a at 600rpm. Headlights, brake lights and fan speed on speed 3 exceeds that without adding anything extra.


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I don't think this is the exact one that I have, but it's been going strong just fine for more than 4 years so far, YMMV.
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Old 12-21-2019, 12:22 PM #22
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FWIW , Did the big three and when stock alt went out I replaced it with the MEAN GREEN high out put its a tight fit.Its been three yrs I think its 140 amps. they have better bearings and bla bla bla they claim its the last alt you will buy. WWW. MEAN GREEN.COM.
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