Got it from Jim K at Applied at the GMCMI Rally. As most of you know. The stock fan clutch is controlled by the temperature of the air as it comes off the radiator. Thus reactive to engine loads. This electrically operated fan clutch is proactive. Because of the temp sensors that are in the engine block. Thus getting a head start on the up coming hot heat loads that will be entering the radiator for cooling. The fan is larger then stock. It's from a Mercedes Benz. The electric fan clutch is from a GM truck. There's a dash light that tells you when it's on. Plus. You can turn it on yourself if desired. I thought that for all that's involved. I think it's fairly cheep at just over $400. Bob Dunahugh
Bought that new electric clutch for the engine fan.
- Thread starter Bob Dunahugh
- Start date
Made a mistake below. Clutch, and fan are both from Mercedes Benz. Bob Dunahugh
________________________________
From: Bob Dunahugh
Sent: Wednesday, September 20, 2017 11:05 PM
To: gmclist
Subject: Bought that new electric clutch for the engine fan.
Got it from Jim K at Applied at the GMCMI Rally. As most of you know. The stock fan clutch is controlled by the temperature of the air as it comes off the radiator. Thus reactive to engine loads. This electrically operated fan clutch is proactive. Because of the temp sensors that are in the engine block. Thus getting a head start on the up coming hot heat loads that will be entering the radiator for cooling. The fan is larger then stock. It's from a Mercedes Benz. The electric fan clutch is from a GM truck. There's a dash light that tells you when it's on. Plus. You can turn it on yourself if desired. I thought that for all that's involved. I think it's fairly cheep at just over $400. Bob Dunahugh
________________________________
From: Bob Dunahugh
Sent: Wednesday, September 20, 2017 11:05 PM
To: gmclist
Subject: Bought that new electric clutch for the engine fan.
Got it from Jim K at Applied at the GMCMI Rally. As most of you know. The stock fan clutch is controlled by the temperature of the air as it comes off the radiator. Thus reactive to engine loads. This electrically operated fan clutch is proactive. Because of the temp sensors that are in the engine block. Thus getting a head start on the up coming hot heat loads that will be entering the radiator for cooling. The fan is larger then stock. It's from a Mercedes Benz. The electric fan clutch is from a GM truck. There's a dash light that tells you when it's on. Plus. You can turn it on yourself if desired. I thought that for all that's involved. I think it's fairly cheep at just over $400. Bob Dunahugh
Does it have some kind of controller that “reads” the signal from the temp sender? I wonder if it would be a simple thing to connect it to the EBL fuel injection brain.
Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, CA
Howell EFI + EBL + Electronic Distributor
>
> Got it from Jim K at Applied at the GMCMI Rally. As most of you know. The stock fan clutch is controlled by the temperature of the air as it comes off the radiator. Thus reactive to engine loads. This electrically operated fan clutch is proactive. Because of the temp sensors that are in the engine block. Thus getting a head start on the up coming hot heat loads that will be entering the radiator for cooling. The fan is larger then stock. It's from a Mercedes Benz. The electric fan clutch is from a GM truck. There's a dash light that tells you when it's on. Plus. You can turn it on yourself if desired. I thought that for all that's involved. I think it's fairly cheep at just over $400. Bob Dunahugh
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, CA
Howell EFI + EBL + Electronic Distributor
>
> Got it from Jim K at Applied at the GMCMI Rally. As most of you know. The stock fan clutch is controlled by the temperature of the air as it comes off the radiator. Thus reactive to engine loads. This electrically operated fan clutch is proactive. Because of the temp sensors that are in the engine block. Thus getting a head start on the up coming hot heat loads that will be entering the radiator for cooling. The fan is larger then stock. It's from a Mercedes Benz. The electric fan clutch is from a GM truck. There's a dash light that tells you when it's on. Plus. You can turn it on yourself if desired. I thought that for all that's involved. I think it's fairly cheep at just over $400. Bob Dunahugh
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Mine goes in (hopefully) next week and the week after. Since my MSD injection computer has a pair of fan turn-ons I will be using one of them. Keep
watching this space. I'm gonna use 200 degrees as the initial set point, and run it up or back as required. The 'fan on' light and the ability to
force it on both appealed to me.
--johnny
--
76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
"I forgive them all, save those who hurt the dogs. They must answer to me in hell" - ol Andy, paraphrased
watching this space. I'm gonna use 200 degrees as the initial set point, and run it up or back as required. The 'fan on' light and the ability to
force it on both appealed to me.
--johnny
--
76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
"I forgive them all, save those who hurt the dogs. They must answer to me in hell" - ol Andy, paraphrased
The fitech also has a fan relay built into it. I may be interested in this here shortly
--
Justin Brady
http://www.thegmcrv.com/
1976 Palm Beach 455
--
Justin Brady
http://www.thegmcrv.com/
1976 Palm Beach 455
Does it look like this?
http://www.ebay.com/itm/Four-Seasons-46104-Electric-Electronic-Fan-Clutch-/142483721456?fits=Make%3AMercedes-Benz&epid=235415964&hash=item212cb10cf0:g:acUAAOSw8gVX26Wi&vxp=mtr
--
1977 Kingsley 455 as stock as it gets except lots of Ragusa parts
http://www.ebay.com/itm/Four-Seasons-46104-Electric-Electronic-Fan-Clutch-/142483721456?fits=Make%3AMercedes-Benz&epid=235415964&hash=item212cb10cf0:g:acUAAOSw8gVX26Wi&vxp=mtr
--
1977 Kingsley 455 as stock as it gets except lots of Ragusa parts
I have to admit, this modification sounds like it could be a real winner. I know Matt C has reported on his, hoping to hear a few more reports before
taking the plunge. But... for all that I think a true electric clutch would be a pain, this seems like the perfect middle ground.
--
Thanks,
Jeremy Knezek
1976 Glenbrook
Birmingham, AL
taking the plunge. But... for all that I think a true electric clutch would be a pain, this seems like the perfect middle ground.
--
Thanks,
Jeremy Knezek
1976 Glenbrook
Birmingham, AL
G'day,
Here it is:
http://www.appliedgmc.com/prod.itml/icOid/1874
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] On Behalf Of Mike Hamm
Sent: Thursday, September 21, 2017 4:47 PM
To: gmclist
Subject: Re: [GMCnet] Bought that new electric clutch for the engine fan.
Does it look like this?
http://www.ebay.com/itm/Four-Seasons-46104-Electric-Electronic-Fan-Clutch-/142483721456?fits=Make%3AMercedes-Benz&epid=235415964&has
h=item212cb10cf0:g:acUAAOSw8gVX26Wi&vxp=mtr
--
1977 Kingsley 455 as stock as it gets except lots of Ragusa parts
Here it is:
http://www.appliedgmc.com/prod.itml/icOid/1874
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] On Behalf Of Mike Hamm
Sent: Thursday, September 21, 2017 4:47 PM
To: gmclist
Subject: Re: [GMCnet] Bought that new electric clutch for the engine fan.
Does it look like this?
http://www.ebay.com/itm/Four-Seasons-46104-Electric-Electronic-Fan-Clutch-/142483721456?fits=Make%3AMercedes-Benz&epid=235415964&has
h=item212cb10cf0:g:acUAAOSw8gVX26Wi&vxp=mtr
--
1977 Kingsley 455 as stock as it gets except lots of Ragusa parts
An electric clutch ain't going to work well. Those I've seen - mostly on large trucks - have a very substantial bearing to take the starting shock.
This setup works like the OEM, but has less seal to leak through and lends itself to electronic engagement/disengagement. The trick to it is the
machined adaptor to allow it to bolt to our water pump. It's built to a Mercedes spec which makes us think it will last.
--johnny
--
76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
"I forgive them all, save those who hurt the dogs. They must answer to me in hell" - ol Andy, paraphrased
This setup works like the OEM, but has less seal to leak through and lends itself to electronic engagement/disengagement. The trick to it is the
machined adaptor to allow it to bolt to our water pump. It's built to a Mercedes spec which makes us think it will last.
--johnny
--
76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
"I forgive them all, save those who hurt the dogs. They must answer to me in hell" - ol Andy, paraphrased
Mike. Looks much like that. It's for diesel trucks. The kit comes with a hub adaptor, sensor, switches, indicator light, very nice wiring harness, and hardware. You're NOT going to find me out trying to make the kit. And I know what parts it takes.
Bob Dunahugh-
________________________________
From: Bob Dunahugh
Sent: Thursday, September 21, 2017 2:29 PM
To: gmclist
Subject: RE: Bought that new electric clutch for the engine fan.
Made a mistake below. Clutch, and fan are both from Mercedes Benz. Bob Dunahugh
________________________________
From: Bob Dunahugh
Sent: Wednesday, September 20, 2017 11:05 PM
To: gmclist
Subject: Bought that new electric clutch for the engine fan.
Got it from Jim K at Applied at the GMCMI Rally. As most of you know. The stock fan clutch is controlled by the temperature of the air as it comes off the radiator. Thus reactive to engine loads. This electrically operated fan clutch is proactive. Because of the temp sensors that are in the engine block. Thus getting a head start on the up coming hot heat loads that will be entering the radiator for cooling. The fan is larger then stock. It's from a Mercedes Benz. The electric fan clutch is from a GM truck. There's a dash light that tells you when it's on. Plus. You can turn it on yourself if desired. I thought that for all that's involved. I think it's fairly cheep at just over $400. Bob Dunahugh
Bob Dunahugh-
________________________________
From: Bob Dunahugh
Sent: Thursday, September 21, 2017 2:29 PM
To: gmclist
Subject: RE: Bought that new electric clutch for the engine fan.
Made a mistake below. Clutch, and fan are both from Mercedes Benz. Bob Dunahugh
________________________________
From: Bob Dunahugh
Sent: Wednesday, September 20, 2017 11:05 PM
To: gmclist
Subject: Bought that new electric clutch for the engine fan.
Got it from Jim K at Applied at the GMCMI Rally. As most of you know. The stock fan clutch is controlled by the temperature of the air as it comes off the radiator. Thus reactive to engine loads. This electrically operated fan clutch is proactive. Because of the temp sensors that are in the engine block. Thus getting a head start on the up coming hot heat loads that will be entering the radiator for cooling. The fan is larger then stock. It's from a Mercedes Benz. The electric fan clutch is from a GM truck. There's a dash light that tells you when it's on. Plus. You can turn it on yourself if desired. I thought that for all that's involved. I think it's fairly cheep at just over $400. Bob Dunahugh
> Does it have some kind of controller that "reads" the signal from the temp sender? I wonder if it would be a simple thing to connect it to the
> EBL fuel injection brain.
That's exactly what I've just done. Easy install, just need a relay for the EBL to control,
and a manual control switch on the dash. You also need to trim the two-piece shroud, though I
suspect if you took the horse collar off the stock shroud it'd probably work. It's a 20" fan,
vs 19" for stock.
I was sick to death of the endless stream of defective fan clutches, so ponied up for this one.
For our latest (very long) trip through lots of very high mountains, we had one clutch that wouldn't turn on,
and another that wouldn't turn off. Driving for hours with a stuck fan clutch is deafening and exhausting.
With the always off clutch, the coach would overheat on hills. It was a loooooong drive. Now we have to
drive back through said mountains.
The fan is a thing of beauty. It's installed, but I haven't tested it yet; hopefully tomorrow.
If it works out, I predict a best seller. Kudos to Tom Pryor for coming up with the kit.
Karen
1975 26'
> EBL fuel injection brain.
That's exactly what I've just done. Easy install, just need a relay for the EBL to control,
and a manual control switch on the dash. You also need to trim the two-piece shroud, though I
suspect if you took the horse collar off the stock shroud it'd probably work. It's a 20" fan,
vs 19" for stock.
I was sick to death of the endless stream of defective fan clutches, so ponied up for this one.
For our latest (very long) trip through lots of very high mountains, we had one clutch that wouldn't turn on,
and another that wouldn't turn off. Driving for hours with a stuck fan clutch is deafening and exhausting.
With the always off clutch, the coach would overheat on hills. It was a loooooong drive. Now we have to
drive back through said mountains.
The fan is a thing of beauty. It's installed, but I haven't tested it yet; hopefully tomorrow.
If it works out, I predict a best seller. Kudos to Tom Pryor for coming up with the kit.
Karen
1975 26'
> An electric clutch ain't going to work well. Those I've seen - mostly on large trucks - have a very substantial bearing to take the starting
> shock. This setup works like the OEM, but has less seal to leak through and lends itself to electronic engagement/disengagement. The trick to it
> is the machined adaptor to allow it to bolt to our water pump. It's built to a Mercedes spec which makes us think it will last.
>
> --johnny
That's the beauty of this setup --- it's electro-viscous, so takes very little power to engage the clutch,
and acts just like the oem clutch when not engaged.
It basically replaces the little thermostat coil with computer or sensor or manual control.
Karen
1975 26'
> shock. This setup works like the OEM, but has less seal to leak through and lends itself to electronic engagement/disengagement. The trick to it
> is the machined adaptor to allow it to bolt to our water pump. It's built to a Mercedes spec which makes us think it will last.
>
> --johnny
That's the beauty of this setup --- it's electro-viscous, so takes very little power to engage the clutch,
and acts just like the oem clutch when not engaged.
It basically replaces the little thermostat coil with computer or sensor or manual control.
Karen
1975 26'
So Folks I finally got a video posted that shows Mercedes Benz fan in
action on my test stand. The input RPM is a constant at 2600 throughout
the whole session.
FOUR SEGMENTS OF THE VIDEO SHOW:
1) SPOOLING AT 2600 RPM, NOT ENGAGED (10/15 SECONDS)
2) SPOOLING AT 2600 RPM, ENGAGEMENT (10/15 SECONDS)
3) SPOOLING AT 2600 RPM DURING DURING DIS-ENGAGEMENT (60 SECONDS)
4) SPOOLING AT 2600 RPM AFTER COMPLETE DISENGAGEMENT (10/15 SECONDS)
REMEMBER YOU CAN HAVE A SENSOR TURN ON THE CLUTCH OR A DASH SWITCH.
SEE: https://www.youtube.com/watch?v=47SC8ot3frM&feature=youtu.be
WHERE TO PURCHASE SEE: http://www.appliedgmc.com/prod.itml/icOid/1874
Some body needs to show me how to put this on our Photo
site,...........please
--
Regards,
Tom Pryor
4188 Limerick Dr
Lake Wales, Fl 33859
Cell 248 470 9186
Living on a waterfront is not a matter of life or death. Its more
important than that.
action on my test stand. The input RPM is a constant at 2600 throughout
the whole session.
FOUR SEGMENTS OF THE VIDEO SHOW:
1) SPOOLING AT 2600 RPM, NOT ENGAGED (10/15 SECONDS)
2) SPOOLING AT 2600 RPM, ENGAGEMENT (10/15 SECONDS)
3) SPOOLING AT 2600 RPM DURING DURING DIS-ENGAGEMENT (60 SECONDS)
4) SPOOLING AT 2600 RPM AFTER COMPLETE DISENGAGEMENT (10/15 SECONDS)
REMEMBER YOU CAN HAVE A SENSOR TURN ON THE CLUTCH OR A DASH SWITCH.
SEE: https://www.youtube.com/watch?v=47SC8ot3frM&feature=youtu.be
WHERE TO PURCHASE SEE: http://www.appliedgmc.com/prod.itml/icOid/1874
Some body needs to show me how to put this on our Photo
site,...........please
--
Regards,
Tom Pryor
4188 Limerick Dr
Lake Wales, Fl 33859
Cell 248 470 9186
Living on a waterfront is not a matter of life or death. Its more
important than that.
> So Folks I finally got a video posted that shows Mercedes Benz fan in
> action on my test stand. The input RPM is a constant at 2600 throughout
> the whole session.
>
> FOUR SEGMENTS OF THE VIDEO SHOW:
>
> 1) SPOOLING AT 2600 RPM, NOT ENGAGED (10/15 SECONDS)
>
> 2) SPOOLING AT 2600 RPM, ENGAGEMENT (10/15 SECONDS)
>
> 3) SPOOLING AT 2600 RPM DURING DURING DIS-ENGAGEMENT (60 SECONDS)
>
> 4) SPOOLING AT 2600 RPM AFTER COMPLETE DISENGAGEMENT (10/15 SECONDS)
>
> REMEMBER YOU CAN HAVE A SENSOR TURN ON THE CLUTCH OR A DASH SWITCH.
>
> SEE: https://www.youtube.com/watch?v=47SC8ot3frM&feature=youtu.be
>
>
> WHERE TO PURCHASE SEE: http://www.appliedgmc.com/prod.itml/icOid/1874
>
> Some body needs to show me how to put this on our Photo
> site,...........please
>
> --
> Regards,
>
> Tom Pryor
I have a minor addition to Tom's post.
"REMEMBER YOU CAN HAVE A(NY) SENSOR TURN ON THE CLUTCH OR A DASH SWITCH.)
In the near term future, I plan to use the temperature into the water pump and the outlet of the A/C condenser both as control signals. Someone with
a 7747 processor you enable one of the included analog switches for this function.
I strongly suggest that you include a visual indicator as the fan noise is very different and you will not be certain of what that new and
non-impressive noise relates to.
Matt - near 3k on the new fan and still impressed.
--
Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan
OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Twixt A2 and Detroit
> action on my test stand. The input RPM is a constant at 2600 throughout
> the whole session.
>
> FOUR SEGMENTS OF THE VIDEO SHOW:
>
> 1) SPOOLING AT 2600 RPM, NOT ENGAGED (10/15 SECONDS)
>
> 2) SPOOLING AT 2600 RPM, ENGAGEMENT (10/15 SECONDS)
>
> 3) SPOOLING AT 2600 RPM DURING DURING DIS-ENGAGEMENT (60 SECONDS)
>
> 4) SPOOLING AT 2600 RPM AFTER COMPLETE DISENGAGEMENT (10/15 SECONDS)
>
> REMEMBER YOU CAN HAVE A SENSOR TURN ON THE CLUTCH OR A DASH SWITCH.
>
> SEE: https://www.youtube.com/watch?v=47SC8ot3frM&feature=youtu.be
>
>
> WHERE TO PURCHASE SEE: http://www.appliedgmc.com/prod.itml/icOid/1874
>
> Some body needs to show me how to put this on our Photo
> site,...........please
>
> --
> Regards,
>
> Tom Pryor
I have a minor addition to Tom's post.
"REMEMBER YOU CAN HAVE A(NY) SENSOR TURN ON THE CLUTCH OR A DASH SWITCH.)
In the near term future, I plan to use the temperature into the water pump and the outlet of the A/C condenser both as control signals. Someone with
a 7747 processor you enable one of the included analog switches for this function.
I strongly suggest that you include a visual indicator as the fan noise is very different and you will not be certain of what that new and
non-impressive noise relates to.
Matt - near 3k on the new fan and still impressed.
--
Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan
OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Twixt A2 and Detroit
The kit Applied has includes both a manual switch and a run light. You don't need a processor necessarily, let the temp probe or the injector system
or the manual switch simply ground a relay and have the relay turn the fan clutch on. You could likely skip the relay, the clutch draws just a couple
pf amps, but I don't trust the capacity of the temp probes which are all made in China. The relay needs very little current to pull in.
--johnny
--
76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
"I forgive them all, save those who hurt the dogs. They must answer to me in hell" - ol Andy, paraphrased
or the manual switch simply ground a relay and have the relay turn the fan clutch on. You could likely skip the relay, the clutch draws just a couple
pf amps, but I don't trust the capacity of the temp probes which are all made in China. The relay needs very little current to pull in.
--johnny
--
76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
"I forgive them all, save those who hurt the dogs. They must answer to me in hell" - ol Andy, paraphrased
Last edited by a moderator:
I'm assuming the 2600RPM is the constant electric motor drive speed to the clutch? With no tach display it's really hard to see the blade speed in the
youtube. So am I understanding correctly the when electrical signal is present, engagement happens in a couple seconds, but disengagement takes longer
for fluid to move back to non working reservoir? Good work though bringing this to reality.
--
John Lebetski
Woodstock, IL
77 Eleganza II
youtube. So am I understanding correctly the when electrical signal is present, engagement happens in a couple seconds, but disengagement takes longer
for fluid to move back to non working reservoir? Good work though bringing this to reality.
--
John Lebetski
Woodstock, IL
77 Eleganza II
> I have a minor addition to Tom's post.
> "REMEMBER YOU CAN HAVE A(NY) SENSOR TURN ON THE CLUTCH OR A DASH SWITCH.)
>
> In the near term future, I plan to use the temperature into the water pump and the outlet of the A/C condenser both as control signals. Someone
> with a 7747 processor you enable one of the included analog switches for this function.
>
> I strongly suggest that you include a visual indicator as the fan noise is very different and you will not be certain of what that new and
> non-impressive noise relates to.
>
> Matt - near 3k on the new fan and still impressed.
I haven't found a pin on the stock 7747 ECM to control a fan, but the EBL modified version definitely has one,
and it works. I've got the fan installed (gorgeous thing) and tested all the inputs, ie a manual switch at the dash
and the relay controlled by the EBL. We've only gotten to run it at idle so far, so can't tell if the fan itself works,
but I fully expect it to. It seems to be noticeably quieter than stock, or even the asymmetric later style fan we were running,
at least at idle. The EBL makes it really easy to play with the on/off temps and a few other parameters.
We are SUPER looking forward to having this thing on our long trip home across three mountain ranges.
The trip out with two busted fan clutches was not fun.
THANK YOU again to Tom for this mod. One of the best things I've seen so far for the GMC (or other old vehicles),
and that's saying a lot.
Karen
1975 26'
> "REMEMBER YOU CAN HAVE A(NY) SENSOR TURN ON THE CLUTCH OR A DASH SWITCH.)
>
> In the near term future, I plan to use the temperature into the water pump and the outlet of the A/C condenser both as control signals. Someone
> with a 7747 processor you enable one of the included analog switches for this function.
>
> I strongly suggest that you include a visual indicator as the fan noise is very different and you will not be certain of what that new and
> non-impressive noise relates to.
>
> Matt - near 3k on the new fan and still impressed.
I haven't found a pin on the stock 7747 ECM to control a fan, but the EBL modified version definitely has one,
and it works. I've got the fan installed (gorgeous thing) and tested all the inputs, ie a manual switch at the dash
and the relay controlled by the EBL. We've only gotten to run it at idle so far, so can't tell if the fan itself works,
but I fully expect it to. It seems to be noticeably quieter than stock, or even the asymmetric later style fan we were running,
at least at idle. The EBL makes it really easy to play with the on/off temps and a few other parameters.
We are SUPER looking forward to having this thing on our long trip home across three mountain ranges.
The trip out with two busted fan clutches was not fun.
THANK YOU again to Tom for this mod. One of the best things I've seen so far for the GMC (or other old vehicles),
and that's saying a lot.
Karen
1975 26'
