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View Full Version : fitting an alternator on a 66 122s


66amazonwag
02-13-2013, 04:18 AM
has anyone swapped an aolternator for the generator on an volvo 122s? need to know parts needed etc.

AndrewNance
02-13-2013, 08:54 AM
Buy this. Ron will give you part numbers for the alternators that work with it.

http://sw-em.com/altkit.htm

jao
02-13-2013, 10:00 AM
That's a good option!

Another is maybe swapping an alternator from a volvo PRV engine. I did this on my b20e. It was pretty straight forward. I remember having to drill put the mounting holes for the standard fasteners. then it bolted up iirc.

JohnMc
02-13-2013, 10:11 AM
The B18 blocks (other than the very late prod?) don't have an alternator mounting location, they just have bolt holes along the side of the block for the generator brackets. So they need an adapter for the large forward facing bolt an alternator uses. And if you're going to adapt something on, you should probably go with that simple, cheap, abundantly available GM/Delco one-wire setup.

I got a Bosch setup in my PV along with the rest of the B20E. But swapping a motor is a bit involved just to get an alternator.

AndrewNance
02-13-2013, 11:41 AM
The B18 blocks (other than the very late prod?) don't have an alternator mounting location, they just have bolt holes along the side of the block for the generator brackets. So they need an adapter for the large forward facing bolt an alternator uses. And if you're going to adapt something on, you should probably go with that simple, cheap, abundantly available GM/Delco one-wire setup.

I got a Bosch setup in my PV along with the rest of the B20E. But swapping a motor is a bit involved just to get an alternator.

YES on the one-wire AC-Delco/Remy units. It's so easy with the adapter kit.

I think '68 was the first year that the blocks were cast with alternator mounts since so many cars were switching to alternators then. My '67 was not cast so I used Ron's bracket. Very good quality and customer service. He made it super easy and provided all the necessary information.

benski
02-13-2013, 02:49 PM
+1 on the easy conversion that Ron supplies, and the GM internally regulated alternator is indeed abundant. I've also thought about one of those higher output alt's as one might find in Summit Racing catalog and all:-D, but the 30 t0 55 amp stuff seems fine for the comparatively low power requirements of my 1968 220 so far. No huge audio amps to feed, no EFI to feed, no rear window defroster, power seats or windows, yadda, yadda, yadda.:)

benski
02-13-2013, 02:54 PM
+1 on the kits.:cool:

JohnLane
02-13-2013, 04:04 PM
That kit will be easier then what I cobbled many years ago!

66amazonwag
02-13-2013, 04:21 PM
the kit comes with total instruction paper start to finish???

Mueller
02-13-2013, 04:47 PM
the kit comes with total instruction paper start to finish???

Did you even bother to read the page? Yes

JohnMc
02-13-2013, 04:52 PM
Ron caters to those pedantic BB types who like detailed instructions.

66amazonwag
02-13-2013, 04:55 PM
just making sure. i probably wont need it. and no i looked at the price and went on a patrol. im in afghanistan bro. didnt have time to read a whole write up inbetween getting shot at sorry.

Canuck
02-13-2013, 05:39 PM
You could also just order an alternator from a 140 and the corresponding regulator or adapt a 240 unit with internal regulator...depends on what you want I suppose. Oh and don't forget to get a real wire going to the starter.

With 140 alternator.
http://www.calgaryvolvoclub.com/gallery/d/17434-2/HPIM0940.jpg

With 240 alternator.
https://fbcdn-sphotos-h-a.akamaihd.net/hphotos-ak-snc7/427200_3898091085323_1506090602_n.jpg

JohnMc
02-13-2013, 05:42 PM
The B18 doesn't have the mounting point for that.

Ad if you're going to adapt something other than what you already have on hand, might as well not use the old Volvo stuff, but the common, cheap, easy to find Delco stuff.

66amazonwag
02-13-2013, 05:48 PM
yeah i ordered the kit from ron... thanks for all the help though guys.

AndrewNance
02-13-2013, 06:15 PM
Make sure when you take your Delco/Remy part numbers to the parts store that you get an authentic Delco/Remy unit and not the comparable store brand. I got the store brand and the first two didn't work right. I took it back for a Delco and it's been fine for a year.

66amazonwag
02-13-2013, 06:30 PM
okie dokie. do you have the part number im ordering all this from afghanistan so i wont be home to looka t teh sheet of part numbers. i wnat to order it here and have it ready for when i get home

AndrewNance
02-13-2013, 06:35 PM
I don't think I have them anymore. Email Ron and he'll give them to you. Any local parts store should have them though. That's the beauty of it. How many Amazon parts can you buy from AutoZone?

66amazonwag
02-13-2013, 06:44 PM
haha not even a f-ing shock lol

Corey
02-13-2013, 07:14 PM
I got my alternator off ebay, 66 amp ac delco. With rons kit it has been working great. Also super easy to install with all the instructions he provides

Canuck
02-14-2013, 11:22 AM
The B18 doesn't have the mounting point for that.

Ad if you're going to adapt something other than what you already have on hand, might as well not use the old Volvo stuff, but the common, cheap, easy to find Delco stuff.

Hmmm. For the 140 conversion I just used the B20 mount point (and you're right, only the late B18's have the hole drilled) and for the 240 mount I used the standard generator mounts that are still on every B20 I've ever seen. I was just trying to give a few options.

Here's the bracket for the 90 amp alternator.

https://fbcdn-sphotos-g-a.akamaihd.net/hphotos-ak-prn1/562058_3902448554257_1226662468_n.jpg

The Denso unit is as common as ditch water and as reliable as the rising Sun. I kind of like my "Old Volvo Stuff".

badvlvo
02-14-2013, 06:58 PM
If you need an alternator for that bracket I can get Delco's fairly cheap in 105a, and some even higher.
You can run it as a one-wire, or with a turn on lead and have the ability to adjust your output voltage.

Ron Kwas
01-28-2017, 01:10 PM
Forum;

I realize this is an ancient thread, but I ran across it again while doing some research and wanted to chime in with a couple of stupid comments. First, a big THANKS all who recommended the engineered Sw-Em alt kit!

Advice often seen: "simply install a "One-Wire" Alternator..." that's oversimplified advice (it comes from people working on tractors, who apparently have trouble when working with more than ONE wire!), given by those who want to make it sound as easy as possible...what they don't mention is that when doing that, you also loose AMP Indicator function! If you can handle following specific detailed instructions, and connecting up all of THREE whole wires without screwing it up, that's the preferred way...and you'll retain the function of the AMP Indicator...just like before!

A couple of words about installing a 100A Alternator: First, a question: What would you possibly need that much power for in your car? Add up all the Loads (including the intermittent/occasional ones like Window lifts and Rear Window Defroggers) and you'd probably have trouble exceeding 1200W. And if you have a 1000W stereo installed, know that it draws less than 1/10 of that when turned up to make your ears bleed!...the only times it truly draws 1000W is on bass peaks, and they don't last very long (unless your showing off, in which case I probably can't help you!). If you want to supply bass peaks for a killer stereo, install some soup-can capacitors, and be done with it!

Also, those 100A don't come from nowhere!...they come from the engine...more specifically, the Crankshaft, by way of the Crankpulley, Fanbelt and (sheetmetal) Water Pump Pulley...if you install a 100A Alt, in order to transfer that much mechanical energy through one belt (without squealing like a pig, if it's possible at all), you'll have to tighten up the Belt like that of a high-wire act across Niagara Falls...then you may get this for free: http://www.sw-em.com/WaPu_pulley_failed_gert444.jpg ...so good luck!

...and I haven't even mentioned the wiring yet...remember...when strengthening one part, the next weakest link in the chain will be the one to break! If you simply want a reliable electrical system in your vintage Volvo, vigorous Wipers, WHITE Headlights, and a fully charged Battery with which to get started next time, I recommend and have engineered the kit to install a 60A Alt...then drive it like you hate it, knowing that it will likely be as reliable as before...as thousand of customer miles have shown!

See also: http://www.sw-em.com/altkit_additional.htm

Cheers