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Re: HHR elec. fans "again"?
[Re: joedust451]
#706247
05/27/10 07:49 PM
05/27/10 07:49 PM
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Joined: Oct 2003
Posts: 3,698
NE Oklahoma
Von
master
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master
Joined: Oct 2003
Posts: 3,698
NE Oklahoma
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Quote:
I'm also wondering if my alt. will be enough, its just a stock unit,
No it wont be enough....
Ive got a GMCS120 (110 amp or so) alternator with twin fans. It pulls the idle down about 150 RPM or so when I switch the fans on.
BTW, Ive got the fans, headlights, and fuel pump on relays.
Last edited by Von; 05/29/10 05:51 PM.
72 RR, Pump gas 440, 452s, 3800 lbs, Corked, ET Radials,. 11.33@117.72.
Same car, bone stock 346s, 9.5 comp, baby solid. 12.24@110.
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Re: HHR elec. fans "again"?
[Re: Von]
#706248
05/28/10 01:59 AM
05/28/10 01:59 AM
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Joined: Feb 2005
Posts: 5,221
Branson, Mo.
joedust451
OP
super gas
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OP
super gas
Joined: Feb 2005
Posts: 5,221
Branson, Mo.
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Quote:
Quote:
I'm also wondering if my alt. will be enough, its just a stock unit,
No it wont be enough....
Ive got a GMCS120 (110 amp or so) alternator with twin fans. It pulls the idle down about 150 RPM or so when I switch the fans on.
Gotcha 
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Re: HHR elec. fans "again"?
[Re: joedust451]
#706249
05/28/10 04:05 AM
05/28/10 04:05 AM
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Joined: Jul 2004
Posts: 4,384
Worst Weather USA
493_DART
master
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master
Joined: Jul 2004
Posts: 4,384
Worst Weather USA
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ive have had NO problems with my HHR fan and stock alternator for the record.
It works just fine without a big amp alt. no change to my idle when fan is on.
Last edited by 493_DART; 05/28/10 04:06 AM.
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Re: HHR elec. fans "again"?
[Re: joedust451]
#706251
05/28/10 08:46 PM
05/28/10 08:46 PM
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Joined: Jan 2003
Posts: 815
Alexandria, NJ
WayneM
super stock
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super stock
Joined: Jan 2003
Posts: 815
Alexandria, NJ
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It's not just the alternator output that will "be enough". It's also the reserve of the battery and the health of your whole charging system- especially the wiring- double especially if you're not sure of the condition of your bulkhead connector, dash harness, ammeter, and engine harness. I have all of that in good shape, and a trunk mounted group 31 truck battery for PLENTY of reserve. I have no problems. My ammeter (new autometer) hardly budges when I flick the switch. About the same if the headlights are on. As far as trimming, I'd say you can take about .5 inch off evenly around the housing without the fan hitting the core. That is up to you. With my radiator package, I needed about 4.5 inches. True hot rodding at play here! 
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Re: HHR elec. fans "again"?
[Re: joedust451]
#706252
05/28/10 08:50 PM
05/28/10 08:50 PM
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Joined: Jan 2003
Posts: 28,067
Irving, TX
feets
Senior Management
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Senior Management
Joined: Jan 2003
Posts: 28,067
Irving, TX
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I assume this is for a street car. Maybe a cruiser or something similar?
What size is your radiator? I might have something for you but it would require an alternator upgrade.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind.
- Stu Harmon
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Re: HHR elec. fans "again"?
[Re: Supercuda]
#706254
05/28/10 11:11 PM
05/28/10 11:11 PM
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Joined: Jan 2003
Posts: 28,067
Irving, TX
feets
Senior Management
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Senior Management
Joined: Jan 2003
Posts: 28,067
Irving, TX
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One thing I've noticed during my adventures in hot rodding is a distinct lack of heavy power distribution blocks in the car. I need to completely rewire the hot rod to clean up all the relays I've added as well as all the hacking that has taken place over the last 45 years.
The alternator stud will be a good place to supply heavy amperage to the fan. Make sure you've got a heavy relay too. My Mercedes fans will spike at 50 amps and settle down to 40 while running. the typical Autozone 30 amp relay won't cut it. Luckily, these fans have a built in start up capacitor. I can run a heavy lead (fused of course) to the fan run lead and a tiny little switched lead to the start up wire.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind.
- Stu Harmon
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Re: HHR elec. fans "again"?
[Re: feets]
#706256
05/29/10 03:06 AM
05/29/10 03:06 AM
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Joined: Feb 2005
Posts: 5,221
Branson, Mo.
joedust451
OP
super gas
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OP
super gas
Joined: Feb 2005
Posts: 5,221
Branson, Mo.
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Quote:
I assume this is for a street car. Maybe a cruiser or something similar?
What size is your radiator? I might have something for you but it would require an alternator upgrade.
Its primarily a street car, was is it that you have??
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Re: HHR elec. fans "again"?
[Re: feets]
#706259
05/29/10 11:01 AM
05/29/10 11:01 AM
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Joined: Feb 2005
Posts: 5,221
Branson, Mo.
joedust451
OP
super gas
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OP
super gas
Joined: Feb 2005
Posts: 5,221
Branson, Mo.
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Quote:
Quote:
Quote:
I assume this is for a street car. Maybe a cruiser or something similar?
What size is your radiator? I might have something for you but it would require an alternator upgrade.
Its primarily a street car, was is it that you have??
I might have another Mercedes fan lurking about but I need to know what size radiator you're running.
Its a factory style 22"
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Re: HHR elec. fans "again"?
[Re: Supercuda]
#706260
05/29/10 11:47 AM
05/29/10 11:47 AM
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Joined: Jan 2003
Posts: 815
Alexandria, NJ
WayneM
super stock
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super stock
Joined: Jan 2003
Posts: 815
Alexandria, NJ
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Quote:
Quote:
It's not just the alternator output that will "be enough". It's also the reserve of the battery and the health of your whole charging system- especially the wiring- double especially if you're not sure of the condition of your bulkhead connector, dash harness, ammeter, and engine harness.
I have all of that in good shape, and a trunk mounted group 31 truck battery for PLENTY of reserve. I have no problems. My ammeter (new autometer) hardly budges when I flick the switch. About the same if the headlights are on.
As far as trimming, I'd say you can take about .5 inch off evenly around the housing without the fan hitting the core. That is up to you. With my radiator package, I needed about 4.5 inches.
True hot rodding at play here!
Where do you think the power for the fan should be taken from? The battery? If so, bad choice
alternator output stud.
The battery is a good place to tap for relay power, but as feets said, you need to have a good distribution place. When I relocated my battery, I put a stud on a mounting strip I made for my relays where the battery used to be. I power the car from there as if it were the batt post. As far as fan ckt protection, I am holding with just a 30A fuse. It hasn't blown. I looked at info I could get on cars with similar fans, and I see 40A, so that's prolly conservative.
The idea of using the HHR fan is being on a budget, and not just calling summit and getting the $600 combo. I think the job gets done nicely.
Last edited by WayneM; 05/29/10 11:49 AM.
2014 Durango R/T
2004 Dodge Ram 3500 SRW SLT short quad Cummins 6 speed
1998 Dodge Durango SLT 5.2
1971 Plymouth Duster-
<<<<<MOPAR SPOKEN HERE>>>>>
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Re: HHR elec. fans "again"?
[Re: 300by500]
#706264
05/30/10 01:46 AM
05/30/10 01:46 AM
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Joined: Feb 2005
Posts: 5,221
Branson, Mo.
joedust451
OP
super gas
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OP
super gas
Joined: Feb 2005
Posts: 5,221
Branson, Mo.
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Well i'm running a factory style rad., so it has the wide mounting brackets on the sides, i really don't want to cut the rad. core support, on my rad. (as many factory mopar rads) the tank overlaps the core lip & rest against the back, so i'd have to chop the crap out of it, thats just not an option for me, so at this point, i might just pass on the elec. fan & try & squeeze a clutch fan in there, i know i can easily install a flex fan, that should have less drag then the solid fan at higher RPMs, but i'm leary on that, because of there blades possibly coming loose.
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Re: HHR elec. fans "again"?
[Re: joedust451]
#706265
05/30/10 01:59 AM
05/30/10 01:59 AM
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Joined: Dec 2007
Posts: 7,759
So Cal
HealthServices
Why would you even post that?
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Why would you even post that?
Joined: Dec 2007
Posts: 7,759
So Cal
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hayden 2765
About the shortest clutch fan you will find.
Allen
Here's a novel idea, let's not throw a bunch of parts at the car hoping it will fix the problem and instead spend a little time diagnosing it first.
Life was a little easier when I was just a wrench.
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Re: HHR elec. fans "again"?
[Re: joedust451]
#706266
05/30/10 10:13 AM
05/30/10 10:13 AM
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Joined: Jan 2003
Posts: 28,067
Irving, TX
feets
Senior Management
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Senior Management
Joined: Jan 2003
Posts: 28,067
Irving, TX
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The Mercedes fans are too big for a 22" radiator. I'm sure one could be made to work but it would require some fabrication.
To those of you who have cut your core supports, you REALLY need to go back in there and add some support. Those are structural elements in the design of the car. Another name for them is upper tie bar. They tie the two sides of the car together.
These cars were made with floppy flexy chassis. Jack up one corner of the car by the unibody rail and open the door. You'll notice that it's different than when the car is on the ground.
You need every bit of support you can find in the chassis. Rough roads can flop the chassis around. A collision on a weakened chassis could make a repairable hit into one that totals the car.
Without that strong upper tie bar you essentially have nothing preventing the tops of the fenders from collapsing into the middle of the car.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind.
- Stu Harmon
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