high amp alt
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 38
From: EXTREME southwest CT
what exactly is a rectifier and what does it do?
I found this on ebay, this what your talking about?
200amp Rectifier part # 95-0043, made by IR, new parts LOT OF 2 | eBay
I found this on ebay, this what your talking about?
200amp Rectifier part # 95-0043, made by IR, new parts LOT OF 2 | eBay
It fits inside and converts the alternating current that the alternator puts out to direct current (DC) that your battery and electrical system can use.
Senior User
Joined: May 2011
Posts: 497
Likes: 0
From: Morgantown, WV
just when i got the head lights on and the light bar, it puts a hurting on my battery, I can watch the gauge fall and thats just running 400w of extra lighting. i had my alt tested twice, once when i got it and again about 2 weeks ago and it checks out fine, no problems and its doing what it should be. thats another reason why I though about dual alts, my current one is fine and Id hate to sit it on a shelf or something and possibly let it go to waste.
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 38
From: EXTREME southwest CT
Yeah, but your present alternator can only put out one half the current of the 3G, and it will only do that with the engine revved up.
The 130 puts out more at idle than your 2G does at 5000rpm
The 130 puts out more at idle than your 2G does at 5000rpm
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 38
From: EXTREME southwest CT
Why do you need it?
I just showed you that even with EVERYTHING you have you're still 250 watts ahead of the full output of the 2G with just the stock 130A.
If you put that rectifier in you're going to have to change ALL your pulleys and buy an expensive wider belt.
Add $250.... to the $75 cost of the High Power rectifier, plus the cost of the 3G 130A and the wiring you need to do...
It's inside the rear case and needs to be soldered in place.
Senior User
Joined: May 2011
Posts: 497
Likes: 0
From: Morgantown, WV
ok, thanks I just wanted to have plenty of charging power if I did ever run all the lights or most or half, etc. but just so I got this clearly, I can just replace my stock 2g with a regular 130amp 3g (w/o rectifier) and that will run my lights fine with no dual battery or dual alt. Im not an electrical genus by a long shot, I was just pondering ideas
so one 130 amp 3g alt + 1 battery=Happy joey
so one 130 amp 3g alt + 1 battery=Happy joey
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Fleet Mechanic
Joined: Jun 2011
Posts: 1,324
Likes: 3
From: Conway, South Carolina
Depends on the year and the engine.
85-93 Serpentine Windsors need the cast aluminum bracket relieved for the larger 148mm 130A unit.
Pic's here; Fuel Injection Technical Library » 3G Install Tech
85-93 Serpentine Windsors need the cast aluminum bracket relieved for the larger 148mm 130A unit.
Pic's here; Fuel Injection Technical Library » 3G Install Tech
Not trying to tread hijack.
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 38
From: EXTREME southwest CT
The 130A has a 130A rectifier already.
Did you read the link I have in post #12???
See where the red line is in comparison to the blue?
Not quite...
one 130A 3G alt + 1 battery + a beefy 2Ga charging cable + a 150A fuse and fuse holder + an adapter harness(or one you make yourself) = more than enough to handle your current needs.
Did you read the link I have in post #12???
See where the red line is in comparison to the blue?
Not quite...
one 130A 3G alt + 1 battery + a beefy 2Ga charging cable + a 150A fuse and fuse holder + an adapter harness(or one you make yourself) = more than enough to handle your current needs.
Senior User
Joined: May 2011
Posts: 497
Likes: 0
From: Morgantown, WV
The 130A has a 130A rectifier already.
Did you read the link I have in post #12???
See where the red line is in comparison to the blue?
Not quite...
one 130A 3G alt + 1 battery + a beefy 2Ga charging cable + a 150A fuse and fuse holder + an adapter harness(or one you make yourself) = more than enough to handle your current needs.
Did you read the link I have in post #12???
See where the red line is in comparison to the blue?
Not quite...
one 130A 3G alt + 1 battery + a beefy 2Ga charging cable + a 150A fuse and fuse holder + an adapter harness(or one you make yourself) = more than enough to handle your current needs.
Fleet Mechanic
Joined: Jun 2011
Posts: 1,324
Likes: 3
From: Conway, South Carolina
Yes I read the link. The reason I was asking it because My factory wiring I have a small plug, and a flat wide plug too. I didn't know if the small plugs were the same b/t the 89 wiring and 3g alt.
