Home » Public Forums » GMCnet » 6v batteries and serpentine belt
| 6v batteries and serpentine belt [message #107090] |
Mon, 29 November 2010 22:37  |
RadioActiveGMC
Messages: 1020
Registered: November 2010
Location: Hot AZ desert
Karma: 0
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Senior Member |
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For those who are running (2) 6v batteries where did you mount them? I was thinking about adding the 3 battery tray for the passenger side, (1) for starting then the other two spots for the 6vs. But then I wondered how many people mount them on the drivers side.
Does adding more batteries affect the front end at all? Since the 6v look fairly bigger and heavier I was wondering.
Then charging them....wouldn't changing al the pullies to a serpentine setup allow for a bigger alternator to be put in (plus I'd imagine help alot with reliability) If installing (2) 6v batteries I'd think a better alt couldn't hurt.
***"Gettin There"-1973 23' Sequoia-
Michael, Onans smell, "Go solar/wind power!"
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| Re: 6v batteries and serpentine belt [message #107096 is a reply to message #107090] |
Tue, 30 November 2010 00:30  |
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I'm running a CS144 with a twin belt pulley, and it runs just fine. Thoighna serpentine system would simplify belt swaps and you would need to only carry one kind of belt...
73 Canyon Lands, (a.k.a. The Yellow Submarine) West Los Angeles CA
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| Re: [GMCnet] 6v batteries and serpentine belt [message #107100 is a reply to message #107097] |
Tue, 30 November 2010 01:58 |
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ljdavick
Messages: 3548
Registered: March 2007
Location: Fremont, CA
Karma: -3
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I have 2 6v batteries, but they are in the back of my 26' coach. I agree that a larger alternator is nice as I have a 100 amp unit installed by Tom Hampton. It works great but the belt squealed like a pig on start up 'till I put in the dual pulley from Jim K and new belts.
Now life is good in my GMC.
Larry Davick
Sent from my iPad
On Nov 29, 2010, at 10:44 PM, Matt Colie <mcolie@chartermi.net> wrote:
>
>
> MrRadioActive wrote on Mon, 29 November 2010 23:37
>> For those who are running (2) 6v batteries where did you mount them? I was thinking about adding the 3 battery tray for the passenger side, (1) for starting then the other two spots for the 6vs. But then I wondered how many people mount them on the drivers side.
>> Does adding more batteries affect the front end at all? Since the 6v look fairly bigger and heavier I was wondering.
>> Then charging them....wouldn't changing al the pullies to a serpentine setup allow for a bigger alternator to be put in (plus I'd imagine help alot with reliability) If installing (2) 6v batteries I'd think a better alt couldn't hurt.
>
> Michael,
> My 23' '73 came to me with a 4D house and an Grp 24 engine all in the right front corner. I traded of the 4D for 2 ea GC2s a little over a year ago.
> The tray that had been added as plywood and all gone. I made another from 3/4 plywood and it has been great.
> My coach still has the original alternator and it manages pretty well. I got tired of hearing the belts squeal and replacing them, so I went to the dual belt trip and believe it to have been an effective upgrade.
>
> Matt
> --
> Matt & Mary Colie
> '73 Glacier 23 Chaumiere (say show-me-air)
> SE Michigan - DTW 3.2/4R
> _______________________________________________
> GMCnet mailing list
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> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
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| Re: [GMCnet] 6v batteries and serpentine belt [message #107101 is a reply to message #107096] |
Tue, 30 November 2010 04:09 |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma: 2
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Thoighna serpentine system would simplify belt swaps and you would need to
only carry one kind of belt...
>
>
However
1 the OEM AC compressor bearings, do not like the load of the serpentine
belt, and one owner changed 3 compressors (and belts).
Another owner, changed to a different AC compressor, and pulley, and
mounting brackets, and finally to a CAD engine ;>)
2 When (not if) the AC compressor freezes up, you can cut the belt on the
OEM system, and just go without AC till you get home. You cannot do this
with a serpentine belt,
3 The water pump runs backwards with the serpentine system, and some pumps
work and some do not. One vendor is trying to develop a "special" pump to
run backwards.
4 There is no gain to the serpentine system, just pain ;>)
so as always, do what you want with your GMC
this is JMHO (just my humble Opinion)
gene
--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
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| Re: 6v batteries and serpentine belt [message #107106 is a reply to message #107090] |
Tue, 30 November 2010 05:55 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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Putting a larger capacity alternator on a GMC will NOT necessarily charge your house batteries any faster. The pair of 6 volt batteries will only take a charge at a given rate based on several factors. Having more charging capacity available will not speed up anything.
A lot of us have gone to 100 amp alternators because it is a very cheap and simple upgrade. It requires nothing more than mounting the new alternator in the same bracket as the one that was removed. Some people change to a double belt pulley which can be installed at the same time as the new alternator. In my case AutoZone installed the double pulley on the replacement alternator for free when they sold it to me.
Some people also increase the size of the wire between the alternator and the isolator.
The biggest benefit of going to a 100 amp alternator is NOT 100 amps but increased power available at slow or idling engine speeds.
I have not measured or calculated the charging rate of a pair of 6 volt batteries but I doubt it is initially more than 40 or 45 amps and it gradually reduces as the battery nears full charge state.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] 6v batteries and serpentine belt [message #107110 is a reply to message #107101] |
Tue, 30 November 2010 07:35 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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Gene,
I don't share your dislike of serpentine belts. The ONLY problems I had
with the setup I had on the 455 were due to helping Leigh Harrison test the
first of his reverse flow water pumps. Before and after that exercise,
which WAS trouble-plagued as are most development programs, I ran standard
water pumps, modified only slightly to improve water flow, with NO cooling
problems.
From the instrumentation Leigh provided for my testing, I know that the
water flow is drastically reduced when running a standard pump backward.
But, during 20,000+ miles, many in HOT weather, I never had a cooling
problem.
The change from an A-6 to a Sanden compressor had nothing to do with the
belt system.
I was happy enough with that serpentine system that I developed one for the
Cad500 when I installed it. That has also been completely trouble free
during the short time I"ve used it -- about 4000 miles. That system uses
two serpentine belts and no tensioner/idlers. From the light tension I'm
using with those belts, I think the bearings are more lightly loaded than
with V-belts.
Serpentine belts are GOOD. But the cost, with Leigh Harrison's setup (mine
was from Bobby Moore), including his reverse flow pump, is too high, IMHO.
Anyone wanting to install a serpentine belt should consider a dual belt
setup like on my Cad -- it was the only way I could avoid running the water
pump backward and resulted in a very neat, clean setup. Many Fords use dual
crankshaft pulleys which can easily be adapted to other hubs.
JMHO,
Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI+ & EBL & Serpentine belts
www.gmcwipersetc.com
On Tue, Nov 30, 2010 at 5:09 AM, Mr.erf ERFisher <mr.erfisher@gmail.com>wrote:
> ...
> 1 the OEM AC compressor bearings, do not like the load of the serpentine
> belt, and one owner changed 3 compressors (and belts).
>
> Another owner, changed to a different AC compressor, and pulley, and
> mounting brackets, and finally to a CAD engine ;>)
>
> 2 When (not if) the AC compressor freezes up, you can cut the belt on the
> OEM system, and just go without AC till you get home. You cannot do this
> with a serpentine belt,
>
> 3 The water pump runs backwards with the serpentine system, and some pumps
> work and some do not. One vendor is trying to develop a "special" pump to
> run backwards.
>
> 4 There is no gain to the serpentine system, just pain ;>)
>
> so as always, do what you want with your GMC
> this is JMHO (just my humble Opinion)
>
> gene
>
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: 6v batteries and serpentine belt [message #107131 is a reply to message #107090] |
Tue, 30 November 2010 09:45 |
Luvn737s
Messages: 1106
Registered: June 2007
Karma: 2
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Senior Member |
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I have 2 6-volt batteries cozied up next to my 12V starting battery up front and I'll probably build some sort of larger battery platform. I would think that the alternator would charge 2 6-volts slower just due to the combined total amps, but that just about any drive to and from camping would be sufficient. Plus the genset can charge the house battery depending on how you wire up the power converter/combiner/isolator mix.
Randy
1973 26' Painted Desert
Ahwatukee (Phoenix) AZ
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| Re: [GMCnet] 6v batteries and serpentine belt [message #107144 is a reply to message #107100] |
Tue, 30 November 2010 12:43 |
UziYaH
Messages: 282
Registered: July 2007
Location: 10-O-C
Karma: 0
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Senior Member |
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Like Larry and Matt, I too am bothered by belts squealing, especially when I
turn on my front AC in the summer.
How about someone 'flow charting' us through the procedure for an upgrade.
Thanks.
Howard Nylander
Royale Class of '78'
Greeneville, Tn.
________________________________
From: Larry Davick <ljdavick@comcast.net>
To: "gmclist@temp.gmcnet.org" <gmclist@temp.gmcnet.org>
Sent: Tue, November 30, 2010 2:58:38 AM
Subject: Re: [GMCnet] 6v batteries and serpentine belt
I have 2 6v batteries, but they are in the back of my 26' coach. I agree that a
larger alternator is nice as I have a 100 amp unit installed by Tom Hampton. It
works great but the belt squealed like a pig on start up 'till I put in the dual
pulley from Jim K and new belts.
Now life is good in my GMC.
Larry Davick
Sent from my iPad
On Nov 29, 2010, at 10:44 PM, Matt Colie <mcolie@chartermi.net> wrote:
>
>
> MrRadioActive wrote on Mon, 29 November 2010 23:37
>> For those who are running (2) 6v batteries where did you mount them? I was
>>thinking about adding the 3 battery tray for the passenger side, (1) for
>>starting then the other two spots for the 6vs. But then I wondered how many
>>people mount them on the drivers side.
>> Does adding more batteries affect the front end at all? Since the 6v look
>>fairly bigger and heavier I was wondering.
>> Then charging them....wouldn't changing al the pullies to a serpentine setup
>>allow for a bigger alternator to be put in (plus I'd imagine help alot with
>>reliability) If installing (2) 6v batteries I'd think a better alt couldn't
>>hurt.
>
> Michael,
> My 23' '73 came to me with a 4D house and an Grp 24 engine all in the right
>front corner. I traded of the 4D for 2 ea GC2s a little over a year ago.
> The tray that had been added as plywood and all gone. I made another from 3/4
>plywood and it has been great.
>
> My coach still has the original alternator and it manages pretty well. I got
>tired of hearing the belts squeal and replacing them, so I went to the dual belt
>trip and believe it to have been an effective upgrade.
>
>
> Matt
> --
> Matt & Mary Colie
> '73 Glacier 23 Chaumiere (say show-me-air)
> SE Michigan - DTW 3.2/4R
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Howard Nylander
Royale Class of "78" "Rocinate"
E-10-o-C
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| Re: 6v batteries and serpentine belt [message #107159 is a reply to message #107090] |
Tue, 30 November 2010 17:06 |
GeorgeRud
Messages: 1380
Registered: February 2007
Location: Chicago, IL
Karma: 0
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Senior Member |
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I have the dual V-belt system on my coach and have been very happy with that upgrade. Cheap and solved the squeeling belt problem (plus having the knowledge that loosing one belt won't leave you at the side of the road).
I also have the 3 battery Ragusa tray, but ended up moving my house batteries to the back generator compartment using the sliding tray that I purchased from JimK (poly tray with stainless steel sliders). It was just too much work to try to install and remove the two 6 volt golf cart batteries through the front hatch. Instead, I have the engine starting battery and a couple of gallons of oil, antifreeze, etc. up front in the space that the battery tray provides.
Again, JWID!
George Rudawsky
Chicago, IL
75 Palm Beach
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| Re: 6v batteries and serpentine belt [message #107182 is a reply to message #107090] |
Tue, 30 November 2010 21:31 |
RadioActiveGMC
Messages: 1020
Registered: November 2010
Location: Hot AZ desert
Karma: 0
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Senior Member |
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Is there any problem running both passenger side batteries in parallel to become a larger starting battery. And then running the two drivers side 6v in series of course to run the house?
***"Gettin There"-1973 23' Sequoia-
Michael, Onans smell, "Go solar/wind power!"
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| Re: [GMCnet] 6v batteries and serpentine belt [message #107201 is a reply to message #107159] |
Tue, 30 November 2010 22:16 |
UziYaH
Messages: 282
Registered: July 2007
Location: 10-O-C
Karma: 0
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Senior Member |
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Anyone got pictures of this dual pully system? Will it help keep my AC from
'squeeling' in the summer time?
Howard N.
________________________________
From: George Rudawsky <GeorgeRud@aol.com>
To: gmclist@temp.gmcnet.org
Sent: Tue, November 30, 2010 6:06:33 PM
Subject: Re: [GMCnet] 6v batteries and serpentine belt
I have the dual V-belt system on my coach and have been very happy with that
upgrade. Cheap and solved the squeeling belt problem (plus having the knowledge
that loosing one belt won't leave you at the side of the road).
I also have the 3 battery Ragusa tray, but ended up moving my house batteries to
the back generator compartment using the sliding tray that I purchased from JimK
(poly tray with stainless steel sliders). It was just too much work to try to
install and remove the two 6 volt golf cart batteries through the front hatch.
Instead, I have the engine starting battery and a couple of gallons of oil,
antifreeze, etc. up front in the space that the battery tray provides.
Again, JWID!
--
George Rudawsky
Chicago, IL
75 Palm Beach
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Howard Nylander
Royale Class of "78" "Rocinate"
E-10-o-C
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| Re: 6v batteries and serpentine belt [message #107202 is a reply to message #107090] |
Tue, 30 November 2010 22:32 |
GeorgeRud
Messages: 1380
Registered: February 2007
Location: Chicago, IL
Karma: 0
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The dual belt system doesn't incorporate the AC compressor (or at least mine doesn't) so that belt has to be tensioned seperately from the alternator belt. The dual belt system only incorporates the water pump, power steering pump, and alternator.
George Rudawsky
Chicago, IL
75 Palm Beach
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| Re: 6v batteries and serpentine belt [message #107204 is a reply to message #107182] |
Tue, 30 November 2010 22:54 |
Luvn737s
Messages: 1106
Registered: June 2007
Karma: 2
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Senior Member |
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| MrRadioActive wrote on Tue, 30 November 2010 20:31 |
Is there any problem running both passenger side batteries in parallel to become a larger starting battery. And then running the two drivers side 6v in series of course to run the house?
|
Where are your starting and genset batteries currently located?
Randy
1973 26' Painted Desert
Ahwatukee (Phoenix) AZ
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| Re: [GMCnet] 6v batteries and serpentine belt [message #107212 is a reply to message #107202] |
Wed, 01 December 2010 06:49 |
UziYaH
Messages: 282
Registered: July 2007
Location: 10-O-C
Karma: 0
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Senior Member |
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Ah so, ...perhaps I should start by tightening my belt (smile). Thanks for the
come-back.
Howard N.
________________________________
From: George Rudawsky <GeorgeRud@aol.com>
To: gmclist@temp.gmcnet.org
Sent: Tue, November 30, 2010 11:32:12 PM
Subject: Re: [GMCnet] 6v batteries and serpentine belt
The dual belt system doesn't incorporate the AC compressor (or at least mine
doesn't) so that belt has to be tensioned seperately from the alternator belt.
The dual belt system only incorporates the water pump, power steering pump, and
alternator.
--
George Rudawsky
Chicago, IL
75 Palm Beach
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
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Howard Nylander
Royale Class of "78" "Rocinate"
E-10-o-C
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| Re: [GMCnet] 6v batteries and serpentine belt [message #107216 is a reply to message #107212] |
Wed, 01 December 2010 07:23 |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma: 2
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Senior Member |
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> Ah so, ...perhaps I should start by tightening my belt (smile). Thanks for
> the
> come-back.
>
> Good idea, and this will also solve the problem, from our friend ChuckA.
http://www.gmcmhphotos.com/photos/showphoto.php?photo=30426&title=air-conditioner-compre&cat=5246
http://goo.gl/B21Nv
gene
>
> Howard N.
>
>
>
>
> ________________________________
> From: George Rudawsky <GeorgeRud@aol.com>
> To: gmclist@temp.gmcnet.org
> Sent: Tue, November 30, 2010 11:32:12 PM
> Subject: Re: [GMCnet] 6v batteries and serpentine belt
>
>
>
> The dual belt system doesn't incorporate the AC compressor (or at least
> mine
> doesn't) so that belt has to be tensioned seperately from the alternator
> belt.
> The dual belt system only incorporates the water pump, power steering pump,
> and
> alternator.
> --
> George Rudawsky
> Chicago, IL
> 75 Palm Beach
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
>
>
>
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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