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140A bolt-on alternator UPGRADE!

Old 06-18-2014, 05:28 PM
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140A bolt-on alternator UPGRADE!

Since there has been a lot of interest in my 140A alt. upgrade, I figured I'd start a thread here detailing some aspects of it.

Currently, I am reaaaalllllly close to releasing a final product. I'm on my 7th prototype bracket and have been making subtle changes to get it exact. This bracket allows you to bolt an adapter bracket in place of your stock serpentine alternator and in its place install a 6" case 140A alternator found on 1994-97 Impala SS applications, among others. I'll be posting pics very soon-I am sourcing hardware for the kit as well as a rear brace design-the brace itself will be a heim-ended design with hardened steel 3/8 him ends. Any questions shoot em my way!
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Old 06-18-2014, 05:59 PM
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Re: 140A bolt-on alternator UPGRADE!

Sure its pricey but Y not do this?
http://www.powerbastards.com/product...4&navsid2=2319
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Old 06-18-2014, 06:20 PM
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Re: 140A bolt-on alternator UPGRADE!

I just bought a CS144 from this place and told them what I was trying to do and they sold me the CS144 with the proper cases and clocking and it dropped right into my serpentine brackets. I only had to buy a new belt afterwards.

The bearings on the CS130's suck
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Old 06-18-2014, 08:56 PM
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Re: 140A bolt-on alternator UPGRADE!

Problems I see with all of those options are:

Can't use a rear mount dual rectifier bridge alt. on a serpentine with tall series valve covers. They offer no adjustable rear bracing which you need with these heavy units and your stock rear brace can't be used with the larger 6.5" cased alternators. Also, who cares about a 1-yr. warranty when you can buy new with lifetime for 1/2 or less than half the cost? I've been down that road looking into aftermarket alts and I'm aware of both sides of it. What I offer is just another option-imo a cheaper and more practical solution. But, the look of the 200+ amp units DO look impressive I must say.
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Old 06-18-2014, 10:00 PM
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Re: 140A bolt-on alternator UPGRADE!

The pic shows an alternator that has the wrong clocking for the serpentine setups as I see it. Looking at the front of it, the 2" ear should be on the right and the smaller ear on the left and, that left one should be threaded....8mm x 1.50 threads to be exact. And you still only get a 1 year warranty.
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Old 06-19-2014, 08:53 AM
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Re: 140A bolt-on alternator UPGRADE!

Originally Posted by formula1LE View Post
The pic shows an alternator that has the wrong clocking for the serpentine setups as I see it. Looking at the front of it, the 2" ear should be on the right and the smaller ear on the left and, that left one should be threaded....8mm x 1.50 threads to be exact. And you still only get a 1 year warranty.
As I said, they sold me the proper cases and clocking for it to drop right in, not what you necessarily see in the pictures. There were many CS144 alternators so they buy and mix-n-match the proper parts to gain the desired result. It was a little close to the valve covers, but I never had any problems. Originally I was going to get a CS130, but they said for the cost it wasn't worth it. If I were to do it again, I would go the same route with the CS144

How much $$ do you have into your 7th prototype bracket?
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Old 06-19-2014, 01:55 PM
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Re: 140A bolt-on alternator UPGRADE!

Cool, well it sounds like it a pretty good deal....there should be more companies doing that. The cost of he fab work hasn't been calculated yet-I had 25 pieces routed knowing several would get scrapped after several mock up attempts. I have an order put in for 75 kits after I get the first bracket approved. It difficult because of the two offset ear angles and keeping them flush to the press brake backstop to get accurate breaks. But, this last one should be it. I see a final cost to a customer of about $70-80 for a bracket kit.

Last edited by formula1LE; 06-19-2014 at 04:01 PM.
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Old 06-19-2014, 06:51 PM
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Re: 140A bolt-on alternator UPGRADE!

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Old 06-20-2014, 11:49 AM
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Re: 140A bolt-on alternator UPGRADE!

Here's some pics of the primary mounting bracket CNC cut from 11 gauge mild steel and bent on an ExPert 150 Bystronic press. You can see how this bracket will be able to mount to a stock serpentine bracket and allow the use of a 140A, 6" case GM alternator.

Along with this is another small bracket and spacer along with 10.9 grade metric hardware to match the existing 10 and 8 mm hardware for the OEM serpentine brackets. Also, my kit will include a rear support brace for the larger alternator and will secure at the upper part of the rear case and extend across to anchor to an existing bolt which secures the AC compressor or delete bracket. With everything engineered to provide 5 points of contact, there will be no worry of breaking a serpentine bracket ear-these 6" alternators are substantially heavier which exponentially increases fatiguing of the existing aluminum serp. bracket. I feel confident this is going to be the best long term route for upgrading.

Kit will be etch primed and painted satin black and will include all hardware and brace with QA1 heim ends and jam nuts. Final price is to be $89 plus shipping for anybody interested.

I just noticed the alt. pic is upside down but you get the idea....lol
Attached Thumbnails 140A bolt-on alternator UPGRADE!-img_20140620_083447_563.jpg   140A bolt-on alternator UPGRADE!-img_20140620_083403_893.jpg   140A bolt-on alternator UPGRADE!-img_20140620_083346_605.jpg  
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Old 06-20-2014, 02:50 PM
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Re: 140A bolt-on alternator UPGRADE!

There....that's better! This is a 124A alt. but I also verified a 140A alt. fits just as nice.
Attached Thumbnails 140A bolt-on alternator UPGRADE!-img_20140620_083447_563-2-2.jpg  
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Old 06-20-2014, 04:44 PM
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Re: 140A bolt-on alternator UPGRADE!

A CS-144 from my 1997 Express with the 5.7 Vortec dropped right onto the stock 1992 TBI F-car brackets I have in my 1980 Vette. I upgraded the Van to a 200A AD-244 and used the old stock 17 year old van alternator on the Vette.
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Old 06-22-2014, 10:16 AM
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Originally Posted by Fast355 View Post
A CS-144 from my 1997 Express with the 5.7 Vortec dropped right onto the stock 1992 TBI F-car brackets I have in my 1980 Vette. I upgraded the Van to a 200A AD-244 and used the old stock 17 year old van alternator on the Vette.
I still don't get how that is possible fast. That goes against everything I've ever read. Got any pictures?
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Old 06-22-2014, 11:21 AM
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Re: 140A bolt-on alternator UPGRADE!

Yds...I too would have to see pics....you'd have to drill the threaded hole to allow for a through bolt which weakens that ear and, you still have to relocate the rear brace-not quite a drop in deal.
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Old 06-24-2014, 05:58 PM
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Re: 140A bolt-on alternator UPGRADE!

Here's some pics of my CS144 bracket adapter installed-it is a snug fit but it all lines up with a 140A 1994-97 Impala SS parts store alternator. This is an unfinished bare bracket w/hardware. After installing it, I have come to the conclusion that this 11ga bracket kit may not require a rear brace as I initially thought. It is very stout and zero flexing. The stock length belt will work but I would suggest a 1.5" longer one to give more travel on the tensioner.

I am using 8mm and 10mm 10.9 grade metric bolts and same grade flanged nuts. You can retain your original torx bolts or use the supplied ones in this kit. Again, I plan to prime and paint the bracket and spacer. Since every GM serpentine brackets may have slight tolerances, I am also including 10mm washers to adjust alternator on bracket adapter to 100% dial in pulley alignment.

So, I am offering these for sale at $89 per kit, painted and with all hardware. Let me know what you think! PM with interest or questions. Thanks! Btw, the pics are underhood shots of a GM serpentine setup on my 86 K-10 shortbox.
Attached Thumbnails 140A bolt-on alternator UPGRADE!-img_20140624_171637_185.jpg   140A bolt-on alternator UPGRADE!-img_20140624_171107_537.jpg   140A bolt-on alternator UPGRADE!-img_20140624_171844_380.jpg  
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Old 06-24-2014, 10:24 PM
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Re: 140A bolt-on alternator UPGRADE!

I already posted pictures of a CS-144 on a F-car serpentine belt setup. Did the same thing on the Vette. I fabricated my own rear support bracket since I have headers too although it is really unecessary. The alternator mounting is very rigid without it and the newer AD-244 does not even have a rear bolt hole.



I think an AD-244 would bolt right up too, given the fact it bolts right in place of a CS-144.



If I upgrade my Vette to a dual electric fan setup I may pickup a second 200a AD-244 to install on it. The one on my Express tested at 241 amps when it was cold and puts out over 100 amps at idle when hot!

Last edited by Fast355; 06-24-2014 at 10:30 PM.
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Old 06-24-2014, 10:34 PM
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Re: 140A bolt-on alternator UPGRADE!

Originally Posted by formula1LE View Post
Yds...I too would have to see pics....you'd have to drill the threaded hole to allow for a through bolt which weakens that ear and, you still have to relocate the rear brace-not quite a drop in deal.
Not sure what you are talking about drilling. Just picked up a longer bolt, a pair of washers and matching nut.

Notice how the Express alternator mounts. Both ears are at the bottem, roughly 90 from each other, not straight across like the ones you are using. It bolts on just like a CS-130.

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Last edited by Fast355; 06-24-2014 at 10:42 PM.
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Old 06-24-2014, 10:36 PM
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Originally Posted by Fast355 View Post

Not sure what you are talking about drilling. Just picked up a longer bolt, a pair of washers and matching nut.
Which cs144 did you use to get the right clocking? The one I have is 12 and 6
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Old 06-24-2014, 10:56 PM
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Re: 140A bolt-on alternator UPGRADE!

Originally Posted by RS-Chevy-SS View Post
Which cs144 did you use to get the right clocking? The one I have is 12 and 6
The one that came factory on my 1997 Express 1500 350 vortec. About 4 and 7 oclock. Its actually nearly upside down in this picture. Has the same clocking as the CS-130 on a factory F-car serpentine setup.

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The TBI truck guys are also replacing their CS-130s with AD-244s and only having to change the belt length and a few bolts and washers.
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Old 06-24-2014, 11:18 PM
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Originally Posted by Fast355 View Post

The one that came factory on my 1997 Express 1500 350 vortec. About 4 and 7 oclock. Its actually nearly upside down in this picture. Has the same clocking as the CS-130 on a factory F-car serpentine setup.



The TBI truck guys are also replacing their CS-130s with AD-244s and only having to change the belt length and a few bolts and washers.
Did you have to do any elongating of the holes or anything?

I admire the way you seem to just make stuff work.

I have the caprice bracket and cs144 so I'll be using that
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Old 06-25-2014, 05:48 AM
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Re: 140A bolt-on alternator UPGRADE!

The drilling he is referring to is the LH serp. bracket mounting ear-it's a smaller ID since an 8mm bolt goes through it to thread into the stock alternator. So at least this mounting ear would require drilling out larger.

With a 1-piece bracket, you have in effect, 4 points of contact-2 at the bracket and 2 from alt. to bracket-this provides a LOT of rigidity.
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Old 06-25-2014, 05:51 AM
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Re: 140A bolt-on alternator UPGRADE!

But then, I guess you could use the optional CS140 TBI truck bracket since it must be setup a bit more stout albeit harder to find. But then, you won't get a mounting provision for the upper hose guide tho-its like somebody needs to cast the best of both style into one serp. bracket lol
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Old 06-25-2014, 11:14 AM
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Re: 140A bolt-on alternator UPGRADE!

Originally Posted by formula1LE View Post
The drilling he is referring to is the LH serp. bracket mounting ear-it's a smaller ID since an 8mm bolt goes through it to thread into the stock alternator. So at least this mounting ear would require drilling out larger.

With a 1-piece bracket, you have in effect, 4 points of contact-2 at the bracket and 2 from alt. to bracket-this provides a LOT of rigidity.
No drilling, just used a 5/16 bolt and brushed the alternator bolt hole with a small piece of thin wall aluminum tubing to eliminate any play between the mounting bolt and larger hole in the alternator.

The alternator mounts on the OEM bracket with a 3 point setup and I used the rear brace bar although I feel it is really not needed. The alternator mount is very rigid even without the brace.

My mentality to make things work by thinking outside the box has lead to many different setups and engine swaps. I had a TPI setup on my G20 van using a newer serpentine setup from a newer TBI Van. Also swapped a 5.7 Hemi into my 4.7 Ram using a drive by cable throttle body and reprogramming the 4.7s PCM to run the Hemi. Its also how the Mercruiser big block 4 cylinder 3.7 aka 1/2 460 in my boat ended up with GM TBI running it.

Last edited by Fast355; 06-25-2014 at 11:17 AM.
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Old 06-25-2014, 01:42 PM
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Re: 140A bolt-on alternator UPGRADE!

Ahh...a sleeve OK that explains it....I was curious about that one. Hmm....multiple options it appears....that's the nice thing about GM....they always try to save a buck making parts mostly interchangeable....gotta love it!
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Old 05-02-2018, 11:59 AM
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Re: 140A bolt-on alternator UPGRADE!

Originally Posted by formula1LE View Post
Here's some pics of my CS144 bracket adapter installed-it is a snug fit but it all lines up with a 140A 1994-97 Impala SS parts store alternator. This is an unfinished bare bracket w/hardware. After installing it, I have come to the conclusion that this 11ga bracket kit may not require a rear brace as I initially thought. It is very stout and zero flexing. The stock length belt will work but I would suggest a 1.5" longer one to give more travel on the tensioner.

I am using 8mm and 10mm 10.9 grade metric bolts and same grade flanged nuts. You can retain your original torx bolts or use the supplied ones in this kit. Again, I plan to prime and paint the bracket and spacer. Since every GM serpentine brackets may have slight tolerances, I am also including 10mm washers to adjust alternator on bracket adapter to 100% dial in pulley alignment.

So, I am offering these for sale at $89 per kit, painted and with all hardware. Let me know what you think! PM with interest or questions. Thanks! Btw, the pics are underhood shots of a GM serpentine setup on my 86 K-10 shortbox.
I wanted to know if you are still selling this bracket? If so how to buy it?
thank you.
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Old 05-02-2018, 12:56 PM
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Re: 140A bolt-on alternator UPGRADE!

If you have paypal that works for me. Shipping anywhere in the U.S. is normally $6-8 Priority Mail so figure $96 shipped. PM me for paypal info!
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Old 05-28-2018, 12:36 PM
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Re: 140A bolt-on alternator UPGRADE!

I'm kind of partial to the DR44 serries after I made one into an alternator welder. The abuse that alt will take is very impressive.
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