have a 120amp 3g alt. for my 90 gt. im runnin a msd 6a, electric fan, about 9 aftermarket guages. is the 120 amp alt overkill. any tips for a perfect installation. will the alt work okay with my setup???
have a 120amp 3g alt. for my 90 gt. im runnin a msd 6a, electric fan, about 9 aftermarket guages. is the 120 amp alt overkill. any tips for a perfect installation. will the alt work okay with my setup???
120 amp won't be overkill, there's some running 3g 130amper's on stock stangs on here. It's not like it's always putting out 120amps, voltage regulator regulates and increases it when you need more juice.
Just make sure you run a 4G wire from the alternator to the solenoid, and dont use the stock 2 skinny wires....use good connections with everything, thats about it. Im sure Jricker or someone will post a installation article...I just ran my 4G wire, but alternator is clicking every revolution and I can't get it apart.
Since a 120 amp alternator will only put out about 50 or 60 amps at idle, it's not overkill. You'll be glad you have it some night, when you're in stop-n-go traffic, in August, when your fan keeps kicking in.
I have an additional 4 gauge ground running from the power steering pump mount to the common chassis ground .
Apart from the grinding I did on the mount bracket, there wasn't much to it. Rather than just grind a notch, I ground the whole web back to the thick part of the bracket. It looks much more factory that way.
Remove the negative cable from the battery for safety reasons.
Small 3 wire used as is, no changes. It plugs into the same connector on the new alternator.
White/black wire on the plug where the Black/orange wires connect gets insulation stripped from it. Splice another wire onto it to make a Y. Solder the connection and use heat shrink tubing on it to cover the splice joint. Crimp a female 1/4" push on terminal the new wire or use a connector from an old wiring harness.
Connect the fused 4 gauge wire to the alternator and the battery side of the starter solenoid.
Plug the 3 wire plug into the alternator.
Plug the white wire you spliced the into the little tab on the alternator.
Black/orange wires get taped up out of the way and not used. Do not remove or mangle the plug on the end of the wires.
Reconnect the battery negative cable.
Wiring is now finished. Check to make sure it is all neat and clean and everything is out of harms way. Start the car and check your voltage.