| OEM roof fans [message #352163] |
Thu, 13 February 2020 12:15  |
6cuda6
Messages: 975
Registered: June 2019
Karma: -6
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Senior Member |
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Hi guys...anyone replace the OEM roof vent fan motors with something newer and more efficient?
No im not talking about replacing the whole thing with a MaxxFan etc just replacing the original motor? Im just curious here as there might be some efficiencies to going and it might be cheaper till one can afford a new fan assembly.....
Rich Mondor,
Brockville, ON
77 Hughes 2600
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| Re: OEM roof fans [message #352191 is a reply to message #352163] |
Fri, 14 February 2020 09:06  |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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Senior Member |
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I think there is a lot of reversion due to no shroud and a round blade circle in a "square" hole. Thinking of making some clear plexi pieces to create a fan shroud. Would have to leave some space around the speed drop resistor for cooling. Can always upgrade, but I like original cuz they ain't makin any more in Pontiac. I think the original motor spins the blade fast enough on HI and more RPM will just create more noise.
John Lebetski
Woodstock, IL
77 Eleganza II
[Updated on: Fri, 14 February 2020 09:09] Report message to a moderator |
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| Re: OEM roof fans [message #352192 is a reply to message #352163] |
Fri, 14 February 2020 09:17 |
Carl S.
Messages: 4186
Registered: January 2009
Location: Tucson, AZ.
Karma: 13
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Senior Member |
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Amazon lists some 12V RV fan motors. I'm not sure about compatibility with what you have, you'd have to figure that out:
https://www.amazon.com/s?k=rv+bathroom+fans&hvadid=77790525084593&hvbmt=be&hvdev=c&hvqmt=e&tag=mh0b-20&ref=pd_sl_7qu5e67s88_e
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles, Solar battery charging. GMCSJ and GMCMI member
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| Re: [GMCnet] OEM roof fans [message #352195 is a reply to message #352191] |
Fri, 14 February 2020 10:47 |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
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Senior Member |
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The biggest influence to operational cooling on my 77 was the replacement
of the missing original air baffles between the grill and condenser (if no
ac it would be the radiator). I had a brand new copper brass radiator,long
block, water pump etc and had no cooling issues while stationary no matter
the outside temp. Idle in traffic for days and it would sit right at 170.
Once underway however my temps would creep. Especially on the highway. It
was not unusual for me to see temps around 200 on the highway which would
make me nervous. I drove it this way all the way from Washington state into
Northern California. Once there I bought some 1/4” plywood and borrowed my
brother in laws jig saw and cut out some crude baffles. Problem solved,
coach would get up to 180-190 and no further no matter what speed over 50
or outside temps. Cost of fix, about $16
Sully
Bellevue wa
On Fri, Feb 14, 2020 at 7:07 AM John R. Lebetski via Gmclist <
gmclist@list.gmcnet.org> wrote:
> I think there is a lot of reversion due to no shroud and a round blade
> circle in a "square" hole. Thinking of making some clear plexi pieces to
> create
> a fan shroud. Would have to leave some space around the speed drop
> resistor for cooling. Can always upgrade, but I like original cuz they
> ain't makin
> any more in Pontiac.
> --
> John Lebetski
> Woodstock, IL
> 77 Eleganza II
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
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Sully
77 Royale basket case.
Future motorhome land speed record holder(bucket list)
Seattle, Wa.
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| Re: [GMCnet] OEM roof fans [message #352196 is a reply to message #352195] |
Fri, 14 February 2020 11:38 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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We stock the original lens.
On Fri, Feb 14, 2020 at 8:48 AM Todd Sullivan via Gmclist <
gmclist@list.gmcnet.org> wrote:
> The biggest influence to operational cooling on my 77 was the replacement
> of the missing original air baffles between the grill and condenser (if no
> ac it would be the radiator). I had a brand new copper brass radiator,long
> block, water pump etc and had no cooling issues while stationary no matter
> the outside temp. Idle in traffic for days and it would sit right at 170.
> Once underway however my temps would creep. Especially on the highway. It
> was not unusual for me to see temps around 200 on the highway which would
> make me nervous. I drove it this way all the way from Washington state into
> Northern California. Once there I bought some 1/4” plywood and borrowed my
> brother in laws jig saw and cut out some crude baffles. Problem solved,
> coach would get up to 180-190 and no further no matter what speed over 50
> or outside temps. Cost of fix, about $16
>
> Sully
> Bellevue wa
>
> On Fri, Feb 14, 2020 at 7:07 AM John R. Lebetski via Gmclist gmclist@list.gmcnet.org> wrote:
>
>> I think there is a lot of reversion due to no shroud and a round blade
>> circle in a "square" hole. Thinking of making some clear plexi pieces to
>> create
>> a fan shroud. Would have to leave some space around the speed drop
>> resistor for cooling. Can always upgrade, but I like original cuz they
>> ain't makin
>> any more in Pontiac.
>> --
>> John Lebetski
>> Woodstock, IL
>> 77 Eleganza II
>>
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
> _______________________________________________
> 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.appliedgmcrvparts.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] OEM roof fans [message #352197 is a reply to message #352196] |
Fri, 14 February 2020 11:41 |
sgltrac
Messages: 2797
Registered: April 2011
Karma: 1
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Senior Member |
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My bad. Wrong fan 😩
Sully
Bellevue wa
On Fri, Feb 14, 2020 at 9:39 AM Jim Kanomata via Gmclist <
gmclist@list.gmcnet.org> wrote:
> We stock the original lens.
>
>
> On Fri, Feb 14, 2020 at 8:48 AM Todd Sullivan via Gmclist gmclist@list.gmcnet.org> wrote:
>
>> The biggest influence to operational cooling on my 77 was the replacement
>> of the missing original air baffles between the grill and condenser (if
> no
>> ac it would be the radiator). I had a brand new copper brass
> radiator,long
>> block, water pump etc and had no cooling issues while stationary no
> matter
>> the outside temp. Idle in traffic for days and it would sit right at 170.
>> Once underway however my temps would creep. Especially on the highway. It
>> was not unusual for me to see temps around 200 on the highway which would
>> make me nervous. I drove it this way all the way from Washington state
> into
>> Northern California. Once there I bought some 1/4” plywood and borrowed
> my
>> brother in laws jig saw and cut out some crude baffles. Problem solved,
>> coach would get up to 180-190 and no further no matter what speed over 50
>> or outside temps. Cost of fix, about $16
>>
>> Sully
>> Bellevue wa
>>
>> On Fri, Feb 14, 2020 at 7:07 AM John R. Lebetski via Gmclist > gmclist@list.gmcnet.org> wrote:
>>
>>> I think there is a lot of reversion due to no shroud and a round blade
>>> circle in a "square" hole. Thinking of making some clear plexi pieces
> to
>>> create
>>> a fan shroud. Would have to leave some space around the speed drop
>>> resistor for cooling. Can always upgrade, but I like original cuz they
>>> ain't makin
>>> any more in Pontiac.
>>> --
>>> John Lebetski
>>> Woodstock, IL
>>> 77 Eleganza II
>>>
>>>
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>>
>> _______________________________________________
>> 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.appliedgmcrvparts.com
> 1-800-752-7502
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Sully
77 Royale basket case.
Future motorhome land speed record holder(bucket list)
Seattle, Wa.
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| Re: OEM roof fans [message #352199 is a reply to message #352163] |
Fri, 14 February 2020 20:25 |
Tomtom
Messages: 20
Registered: June 2017
Location: Huntington Beach, CA
Karma: 0
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Junior Member |
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I had just bought a new tig welder and was looking for a project. Overkill for sure, but it works great. Motor is a $10 amazon motor. Had to make a sleeve to increase the armature diameter. It actually works better than the original motor in the other vent. Quieter and draws less current. Had to balance the fan. Did this by putting on a flat surface and measuring each blade front and back and bending blades until they were all close to the same.
https://imgur.com/a/pHSvKJo
Tom
77 Kingsley. Mostly Stock, 455, Quad bag, tachometer, 16"wheels, Macerator.
Southern California, huntington beach
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