I have a stock Toronado 455 setup. However, is is not in a GMC.
The 455 in the GMC is the closest to what I am working on and dealing with.
It is in a 60's type RV that shares some issues and more than the GMC.

I personally would prefer to go DELCO.
I'm looking for something that is mainly a bolt in, yet bigger and better than the 12 SI.
WHY - I don't have the room that the GMC might have to relocate the Alternator.

FYI - I'm looking for no less than 140AMPS.
I'm thinking CS130, CS130D or even the CS144 - IF it will fit WITHOUT changing out the brackets.
WHY - Future plans = 3 electric cooling fans, 2 heater fans, electric fuel pump, Air Ride, HEI Distributor, Radio, TV, 2 computers and all factory lights.

QUESTIONS:

1. Does the GMC Motorhome 455 use the stock Toronado 455 Alternator bracket setup? OR was the bracket setup made for the GMC setup?

2. What is the largest AMP alternator you have been able to install in your GMC - WITHOUT - changing out the brackets?

3. IF you had to change the brackets
A. What Alternator did you use?
B. What did you end up having to do with the stock bracket setup?


Thank you for your help and time in this matter.

Tony

Tony,

Here's a link to a series of photos of the stock 455 alternator setup:

http://www.gmcmhphotos.com/photos/front-clip-reassembly/p46910-100amp-alternator-mount-on-455-engine.html

Regards,
Rob M.
The Pedantic Mechanic
Sydney, Australia
AUS '75 Avion - The Blue Streak TZE365V100428
USA '75 Avion - Double Trouble TZE365V100426
USA '77 Kingsley - TZE 267V100808


-----Original Message-----
From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of Tony
Sent: Thursday, August 17, 2017 7:26 AM
To: gmclist@list.gmcnet.org
Subject: [GMCnet] What high AMP Alternator are you using?

I have a stock Toronado 455 setup. However, is is not in a GMC.
The 455 in the GMC is the closest to what I am working on and dealing with.
It is in a 60's type RV that shares some issues and more than the GMC.

I personally would prefer to go DELCO.
I'm looking for something that is mainly a bolt in, yet bigger and better than the 12 SI.
WHY - I don't have the room that the GMC might have to relocate the Alternator.

FYI - I'm looking for no less than 140AMPS.
I'm thinking CS130, CS130D or even the CS144 - IF it will fit WITHOUT changing out the brackets.
WHY - Future plans = 3 electric cooling fans, 2 heater fans, electric fuel pump, Air Ride, HEI Distributor, Radio, TV, 2 computers
and all factory
lights.

QUESTIONS:

1. Does the GMC Motorhome 455 use the stock Toronado 455 Alternator bracket setup? OR was the bracket setup made for the GMC setup?

2. What is the largest AMP alternator you have been able to install in your GMC - WITHOUT - changing out the brackets?

3. IF you had to change the brackets
A. What Alternator did you use?
B. what did you end up having to do with the stock bracket setup?


Thank you for your help and time in this matter.

Tony


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Ultravan Owners wrote on Wed, 16 August 2017 17:26

I have a stock Toronado 455 setup. However, is is not in a GMC.
The 455 in the GMC is the closest to what I am working on and dealing with.
It is in a 60's type RV that shares some issues and more than the GMC.

I personally would prefer to go DELCO.
I'm looking for something that is mainly a bolt in, yet bigger and better than the 12 SI.
WHY - I don't have the room that the GMC might have to relocate the Alternator.

FYI - I'm looking for no less than 140AMPS.
I'm thinking CS130, CS130D or even the CS144 - IF it will fit WITHOUT changing out the brackets.
WHY - Future plans = 3 electric cooling fans, 2 heater fans, electric fuel pump, Air Ride, HEI Distributor, Radio, TV, 2 computers and all factory lights.

QUESTIONS:

1. Does the GMC Motorhome 455 use the stock Toronado 455 Alternator bracket setup? OR was the bracket setup made for the GMC setup?

2. What is the largest AMP alternator you have been able to install in your GMC - WITHOUT - changing out the brackets?

3. IF you had to change the brackets
A. What Alternator did you use?
B. What did you end up having to do with the stock bracket setup?


Thank you for your help and time in this matter.

Tony

Hey Tony,

Matt here - again...

The two leg 12SI is a pretty standard frame, it can be built up to about 120 amp and if you do, I an ASSURE you that it will need 2 (two, deus, zwei) belts as the limit for one is about 100 amp. From what I am remembering, the FEAD layout of the passcar was not that different than the coach.

Most of the CS machines that I messed with were the single foot kind and while I know the brackets can be adapted, it is not always simple to get the alignment correct.

I suggest that if no one here has a better answer that you contact Balmar (www.balmar.net) and ask them. Back in the boat work days I bought more than a few charging systems from them.

Your future list is long, but only the cooling fans are real big load. Most of the rest isn't all that big.

Good Luck and I hope someone that knows more comes along soon.

Matt

First of all, any old school rebuilder can rebuild those into the 150 range with no problem.

Second, if you do not have factory air, your alt, may not be were most GMC's are located. None AC 455s have it on the passenger side.

Mike

Toronado uses a smaller alternator as it does not have the additional
battery to support

On Wed, Aug 16, 2017 at 2:26 PM, Tony wrote:

> I have a stock Toronado 455 setup. However, is is not in a GMC.
> The 455 in the GMC is the closest to what I am working on and dealing with.
> It is in a 60's type RV that shares some issues and more than the GMC.
>
> I personally would prefer to go DELCO.
> I'm looking for something that is mainly a bolt in, yet bigger and better
> than the 12 SI.
> WHY - I don't have the room that the GMC might have to relocate the
> Alternator.
>
> FYI - I'm looking for no less than 140AMPS.
> I'm thinking CS130, CS130D or even the CS144 - IF it will fit WITHOUT
> changing out the brackets.
> WHY - Future plans = 3 electric cooling fans, 2 heater fans, electric fuel
> pump, Air Ride, HEI Distributor, Radio, TV, 2 computers and all factory
> lights.
>
> QUESTIONS:
>
> 1. Does the GMC Motorhome 455 use the stock Toronado 455 Alternator
> bracket setup? OR was the bracket setup made for the GMC setup?
>
> 2. What is the largest AMP alternator you have been able to install in
> your GMC - WITHOUT - changing out the brackets?
>
> 3. IF you had to change the brackets
> A. What Alternator did you use?
> B. what did you end up having to do with the stock bracket setup?
>
>
> Thank you for your help and time in this matter.
>
> Tony
> --
> Tony (Ontario Canada) Marie and I are blessed to have had a 2nd chance
> to buy our farm. Someday I hope to build the garage of my dreams. We have
> 4
> Ultravans & 2 Corvairs. Our 1970 Ultravan #520 has an Olds Toronado 455
> in back.
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>



--
Jim Kanomata
Applied/GMC, Newark,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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How do you like the Ultravan?
I almost bought one until I settled no the GMC last year.

The original alternator on the '78 models is rated at 145 amps