Delco Alternator Conversion

[stonefox]

Julian,
Side note .Ike's bracket doesn't work with the original exhaust manifold .If yours has not been up graded (most have) or maybe its a later truck with the newer style manifold anyway.
Food for thought.

[knac1234]

Julian,
Side note .Ike's bracket doesn't work with the original exhaust manifold .If yours has not been up graded (most have) or maybe its a later truck with the newer style manifold anyway.
Food for thought.

Sean,

Thanks for the tip. Unfortunately, I have no idea on my manifold. I replaced it when I did some resto work on the truck in November with a new one (that looked identical to the cracked one) from either RN or AB.

I assume it's the stock 72 Series III one, as that is what I ordered, but maybe I should ask Ike when I order from him to be sure.

Julian

[crankin]

Mark and Jeff,
You guys are usually well informed and do your research.
Why the 10-SI instead of the 12-SI? Also, I know that the amps can save some money...what amp did you guys go with...and why?

[jac04]

I bought the 10SI because it was available from NAPA as a brand new (not rebuilt) unit with a lifetime warranty, at a fairly reasonable price. Mine is rated for a nominal 63A output, but the test form that came with it shows peak of 81 amps, with about 65 amps at idle. Since I don't run lots of electronics, it's plenty for my needs.

[SafeAirOne]

Why the 10-SI instead of the 12-SI? Also, I know that the amps can save some money...what amp did you guys go with...and why?

Clint,

At first I installed a 63-amp 10SI because I needed to get to work that day and that alternator was readily available at my local PepBoys. Plus, it was right about the same amp rating as the Lucas A127 it was replacing. After several failures of the 10SI, I decided to A) find a new auto parts store and B) add a couple of bucks and upgrade to the 96-amp 12SI.

My reasoning is that an alternator puts out only the amperage necessary to meet the load, so it's not always putting out 96amps but it has the ability to do it if, say, I were to install an electric winch or a dual battery setup or high-demand accessories. A 63-amp alternator will never have this reserve ability.

[crankin]

Excuse my ignorance on this...I have looked at the normal haunts for information on this but can't seem to find it. What wiring needs to be done with the SIII? I have found a lot for the IIa but not the III.

[printjunky]

Lot of info here:

http://www.madelectrical.com/electrical-tech.shtml

But that might get a little deep, so ...

http://www.oldengine.org/unfaq/10si.htm

And of course (someone probably already posted this), TeriAnn:

http://www.expeditionlandrover.info/Delco_Alternators.html

On my SIII, The battery lug goes to the battery, the #2 terminal goes to that lug as well, and the #1 terminal goes to my charge light behind the dash (the other side of which gets keyed power). All works fine (though I have to kick it up a little more than I think I should to get the current flowing (and the charge light to go out).

[SafeAirOne]

Nothing needs to be done, really. You connect the brown wire to the threaded terminal, the brown/yellow wire to the charge lamp goes to spade terminal #1 and ideally you should run a wire from spade terminal #2 to the main electrical distribution point on the vehicle, which would be the always-'hot' side of the fuse box, but just running a short jumper from spade terminal #2 to the threaded terminal on the alternator does the job, just a little less accurately:

[knac1234]

All,

So based upon Mark's cheat sheets he posted, it appears I need an alternator for a 85 Buick Riviera 5L to get the 94 amp spec! This is what I found and think I am going to get with Ike's brackets. Great price and limited lifetime warranty (I verified that limited means if you run over it or drop it in a vat of acid, etc....!).

Let me know what you think and I'll get it ordered!

http://www.oreillyauto.com/site/c/detail/ULT0/010244/01468.oap?ck=Search_01468_1021891_3126&pt=01468&ppt=C0330

Julian

[I Leak Oil]

There's nothing to think about, do it!

[mongoswede]

At 12.6 volts a 63 amp alternator gives you 794 watts of power to work with. For most stock rovers this is plenty of power. If you are running lots of driving lights or winches or accessories you might need a bigger unit. power = voltage x current. So if you know the power draw on a component simply divide by operating voltage to determine your amperage draw and you can get a ball park idea for the charging demands on your truck. A bigger alternator drawing more current will also rob more power from the engine. If your alternator has a big pulley on it you may be able to put a smaller pulley on to increase the charging capacity. Also if you put in a newer alternator consider making up some heavy duty battery cables which help minimize voltage loss. I like using 2 gage welding cable for the power and ground battery cables.

[knac1234]

All,

Anyone know what fanbelt I need for this alternator? Got the brackets and alt ordered, hoping someone knows the exact size for it on a 72 SIII using Ike's bracket setup?

Thanks,
Julian

[crankin]

All,

Anyone know what fanbelt I need for this alternator? Got the brackets and alt ordered, hoping someone knows the exact size for it on a 72 SIII using Ike's bracket setup?

Thanks,
Julian

Dayco 15405

[jac04]

I used a Dayco 15495. 49.5" long.

Clint - The Dayco 15405 is 40.5" long. I think one of us has the wrong number.

[crankin]

I used a Dayco 15495. 49.5" long.

Clint - The Dayco 15405 is 40.5" long. I think one of us has the wrong number.

It's me...you called me out again. It was from my spec sheet. I have a with Ike's bracket and w/out Ike's bracket using washers. So, Julian, I am trying to mess people up. Go with jac04. In fact, anytime I say something and jac04 weighs in, always defer to him.

I mean for Pete's sake the man made a tray to catch the oil dripping from the tranny! (and what a big gal she was! Wokka Wokka)