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Alternator Upgrade

 
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knsstang



Joined: 27 Apr 2005
Posts: 168
Location: Detroit, Michigan

PostPosted: Sat Sep 24, 2016 1:11 am    Post subject: Alternator Upgrade Reply with quote

Hello all.. I have recently started driving my car again( Motorcycle's down) and I forgot how bad the/my charging system is in this car. I plan on doing the a 3g alternator upgrade and was wondering if anyone in here has down one on a McLaren?
The reason that I ask is because I swapped the lestik for a regular alternator years ago and I have a thick battery wire that was running to the lestik. Can I use that battery wire to run from the new alternator as it already goes to the starter relay. Thanks for any advice.
edit: I looked up the part #( I think it's POSITIVE CABLE (E8ZZ-14300-A) for your 1989 Ford Mustang LX with a 5.0L V8 CYLINDER, W/72 AMP BATTERY) so I think it will work. http://www.oemfordpart.com/ford/mustang/e8zz14300a/1989-year/lx-trim/5-0l-v8-gas-engine/electrical-cat/battery-scat/?part_name=positive-cable
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2001 Kawasaki ZX12R(91,215 miles)
2013 Kia Optima
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svo413



Joined: 29 Aug 2004
Posts: 693
Location: San Mateo, California

PostPosted: Sat Sep 24, 2016 7:26 am    Post subject: Cable Reply with quote

That would apear to be the service replacement positive battery cable. The cable is certainly heavy enough and really has no affect on the cahargng output of the alternator. I have found another replacement cable which looks closer to the original. I will post some info on it. There is also new reproduction one out but I have not see it yet.
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Kevin Gold card MCA Judge for Fox Body
85 ASC Vert #612205
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84 SVO 24,000 miles
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svo413



Joined: 29 Aug 2004
Posts: 693
Location: San Mateo, California

PostPosted: Sat Sep 24, 2016 8:09 am    Post subject: Cable Reply with quote

The e8zz cable uses a brass plated battery connector. It is certainly a quality design. I have found Motorcraft wc-8902 to be a closer match to the original. Just remove the corrogated tubing and the terminal cover and it will look just like the original except no number stamped on the cable. Prices for this part are pretty reasonable if you search eBay. A good used part may exceed $100.
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Kevin Gold card MCA Judge for Fox Body
85 ASC Vert #612205
88 ASC Vert #542 20,550 miles
84 SVO 24,000 miles
03 Mach I 7,900 miles
89 LX Vert
14 CA Special
69 Mustang coupe
67 T-bird 47,000 miles
16 F250
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knsstang



Joined: 27 Apr 2005
Posts: 168
Location: Detroit, Michigan

PostPosted: Sat Sep 24, 2016 3:43 pm    Post subject: Reply with quote

Does anyone know if the original one in the car is a 4gauge or 6gauge positive cable. All of the upgrades that i've read said use a 4gauge wire. I was thinking that if i already have one in the car, I don't have to buy a new one.
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2001 Kawasaki ZX12R(91,215 miles)
2013 Kia Optima
2007 Mercury Mountaineer V8
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svo413



Joined: 29 Aug 2004
Posts: 693
Location: San Mateo, California

PostPosted: Sat Sep 24, 2016 8:21 pm    Post subject: 3G upgrade Reply with quote

I'm not a big fan of the 3 g upgrade as there is plenty of amps available in the stock looking unit.

The main issues with making the upgrade is getting the right sized alternator to fit properly and then the wiring. The second, is a wiring issue iand to install a large enough wire from the 100 amp alternator to the common connection point (starter solenoid). The battery cable is not the weak point. The factory alternator charging wire is not capable of 100 amps. Also when adding a 100 amp power source, it would be best to have it fused to prevent a fire.
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Kevin Gold card MCA Judge for Fox Body
85 ASC Vert #612205
88 ASC Vert #542 20,550 miles
84 SVO 24,000 miles
03 Mach I 7,900 miles
89 LX Vert
14 CA Special
69 Mustang coupe
67 T-bird 47,000 miles
16 F250
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knsstang



Joined: 27 Apr 2005
Posts: 168
Location: Detroit, Michigan

PostPosted: Sat Sep 24, 2016 8:43 pm    Post subject: Re: 3G upgrade Reply with quote

svo413 wrote:
I'm not a big fan of the 3 g upgrade as there is plenty of amps available in the stock looking unit.

The main issues with making the upgrade is getting the right sized alternator to fit properly and then the wiring. The second, is a wiring issue iand to install a large enough wire from the 100 amp alternator to the common connection point (starter solenoid). The battery cable is not the weak point. The factory alternator charging wire is not capable of 100 amps. Also when adding a 100 amp power source, it would be best to have it fused to prevent a fire.


Thanks...
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4-barrel Mike



Joined: 30 Jan 2016
Posts: 124
Location: Portland, OR

PostPosted: Tue Oct 11, 2016 5:14 am    Post subject: Reply with quote

The 1G alternator in my '85 recently died. I subbed in a marginal 1G that had been sitting on the shelf for 20 years or more; it wasn't satisfactory.

I had planned on updating with a reasonably new 3G that had been in my 2.3T '90 Mustang, so now was the time. Using a barely used alternator-to-starter solenoid cable and alternator wiring harness from a '94 3.8l Mustang, the 3G was quickly and easily installed.

14+ volts at idle with maximum load (EVERYTHING turned on) makes the minor effort WELL worthwhile.

Mike
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