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