Delco Alternator Conversion

[knac1234]

All,


So I started a similar thread a while back, and now am ready to do the conversion. I want to use the Delco 96si (96 amp) alternator recommended by Mark. It appears that it is already established that a stock SIII wiring harness will have no problem with this setup.


So.....

-Can't seem to find it. What model exactly is it? Or better yet, what car was it fitted to originally so I can reference the regular auto parts retailers' websites?

-Will it come with a pulley to fit a normal fan belt.....or will it come with one for a serpentine belt.....or none of the above?

-Brackets.....I know Ike sells them, but is it possible to mount it properly in the stock SIII bracket setup near the front left bottom of the engine?

-Any other bits I will need? Spacers for the mounting if not using Ike's brackets? Different plug for wiring to the alternator?

Any help appreciated. I will tackle this in a couple of weeks when I take the wing off to put a new manifold gasket on (noticed an exhaust leak last night). And, if steering work is required, bringing the truck to the mechanic with the wing already off will save me a few pennies!

Julian

[bkreutz]

No such animal as a 96 SI, I think you're thinking of a 12 SI, 94 amp, look here (http://www.expeditionlandrover.info/...ternators.html) for some good info. I'd take my old alternator to an alternator shop, buy the alternator from them and have them swap the pulleys over. My experience is that most alternators come without pulleys. Also, if you're interested, here's a link to a site that has info on both the 10 and 12 SI's, and what and when they were OE. http://bob_skelly.home.comcast.net/~...ternator1.html

[jac04]

If you get an alternator from NAPA, it usually comes with a pulley. My 10SI did (NAPA 1N-4011A). They also have plenty of 12SI alternators. Just search "Delco 12SI" on their web site.

[SafeAirOne]

Julian,

All the 10si / 12si info can be found on this page here, including part numbers at the bottom of the page.

This page here will give you cross-reference and application info, just plug the AC Delco or Lester # into the search box. Be sure to check that the crossed part number has the right pulley setup.

A 10SI/12SI will not work with the existing bracket (at least not the 574855 cast bracket) without grinding down the area between the alternator mount ears a bit with a grinder, then making a spacer to sandwich between the bracket and the block to get the pulley alignment correct. Oh, and you need to move the stock adjuster (the slider that makes the upper mount) up a few boltholes on the timing cover as well.

As for which alternator to get: Presuming that you use the stock location on the lower left corner of the engine (as you sit in the Rover), a 9:00 or a 12:00 will work. I have a 9:00, but I think a 12:00 would be better, so I wouldn't have to use an inspection mirror or braile to fit the sense and warning lamp wires on their spade connectors.

My full write-up and frustrations with PepBoys alternators can be found here.

The 10SI shown in my pics below:

[1971Series88]

Just get the alternator bracket from Ike at www.pangolin4x4.com - perfect solution and put the 10/12SI on from Delco - from Napa as previous poster suggests....best and easiest solution.

Unlike the one above it puts the alternator in a much better/serviceable spot as an option.

[jac04]

Unlike the one above it puts the alternator in a much better/serviceable spot as an option.

There are pros/cons to both locations. Where Mark put it is a nice spot, other than it possibly getting splashed with water/mud when off-roading.

The Pangolin bracket puts it in a more serviceable spot that is less prone to contamination. However, there are a few trade-offs. The Pangolin brackets put the alternator above the exhaust manifold. It is more prone to pulling in hot air from around the exhaust, thus running hotter. Maybe not a big deal. Also, the Pangolin location results in a smaller belt contact on the pulley. I tried to run it with a single belt, but the belt would always squeal & slip when I blipped the throttle. I'm now back to running the military double belt system without belt slipping issues.

[I Leak Oil]

I moved my alternator up as well. So much simpler to change out (especially when you're in the snow and have to lay on your back while dropping lots of washer and fasteners). And yes, it stays cleaner. Mine slips just a little bit with the single belt also. Just a fine line between being tight enough and too tight, less forgiving than the bottom mount setup. I made a little metal heat shield that goes between the manifold and the alternator to help with the heat issue....in theory it works....

[knac1234]

All,

Thanks for the comments......will use the list to source the alternator.

I had planned on not using the Ike brackets to keep the location original, but I am not sure that I want to grind down the original brackets (didn't I read somewhere that they are pretty hard to come by and actually worth some $)??

Anyway, I had planned on then getting Ike's brackets.

Now, reading I Leak Oil and Jac's comments, I am concerned about the belt slipping. I will be running it with a single fan belt, as original (maybe a longer one though?), and do not have a double pulley setup nor do I want to install one. Is this really an issue? I do not want to compromise the charging system simply by putting the new brackets in place.

Can anyone elaborate? If the slipping is not an issue, I will get Ike's brackets. Sorry for the line of questioning, but of course I want to make sure I have all relevant parts in hand so that when the wing comes off it is a straightforward installation.

Thanks,
Julian

[jac04]

Well, the only time my belt would slip was when I blipped the throttle. I didn't get any slippage during normal driving.
I think you'll be OK.

[east high]

I've been running Ike's bracket for years with a single belt without issue. No heat problems or squealing belts and I've always had all the juice I've needed to run everything at the same time too.

I give two thumbs up to Ike's bracket.

[I Leak Oil]

Like Jeff, mine is only a little chirp when I blip the throttle. Really isn't an issue for me or the charging system. With that said, i wouldn't hesitate one second to got the pangolin bracket route again.

I'm going to look into using a slightly wider belt if I ever have to replace one.

[cedryck]

Safe air, I like your routing of the main alt. wire, the protective shroud is will placed since it is so close to that hot manifold. Nice work there, cheers.

[knac1234]

Thanks....looks like this will be the route.....94 amp Delco w/Ike's brackets!

I agree.....Mark's routing of the wire is very good due to the hot exhaust manifold....will do the same!

Julian

[east high]

I'm running a Gates belt #7490, FYI, which came recommended from the man himself.

[SafeAirOne]

Safe air, I like your routing of the main alt. wire, the protective shroud is will placed since it is so close to that hot manifold. Nice work there, cheers.

Wish I could take credit for it, but I just used the same routing as the old wiring when I rebuilt the engine harness (2.5 diesel) except I used an adel clamp instead of the metal loop that the factory seems to like so much.