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Discussion Starter · #1 ·
/wwwthreads_images/icons/tongue.gif We are looking at buying an entire fan setup for our 304 CJ7, because the previous owner tossed the fan, the clutch, AND the shroud, and installed a flexocrap, power-robbing fan. Yesterday I was reading a JC Whitney sale catalog (#114J-03) which has a 16" electric fan on page 50. We were thinking that in our case, where we have nothing to toss out of value......like we aren't tossing a perfectly good Waggie fan and clutch.......and have NO shroud anyway, that it might just make good sense to buy this JCW unit for 89 bucks, including thermostatic switch. We can use an over ride relay to pull the fan in whenever the A/C runs. Does anyone have an idea as to what a 2100 CFM electric fan will be equal to in terms of cooling with A/C. Summit only shows some little fans, and the fans in junk yards are much smaller as well. I'm looking for massive overkill ....as usual/wwwthreads_images/icons/crazy.gif

CJDave
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When I did my engine swap, the stock fan on the 302 ended up too far back to do any good.So I throwed it away and ordered a 16" electric fan. I ordered it from Jeg's but I'm guessing it's similar to the JC Whitney model you stated. The only problem I have had with it was that it was too tall to fit between the tanks on my radiator. I used a round file and managed to get it to fit. Seems to work fine on a three core factory Jeep radiator, but no a/c. I had a small battle with a bad cap, but that doesn't affect you. If you are looking for overkill, you might want to consider one of those double fan set ups. I've heard the two 10" set up is awesome. But I've got my 16" kicking (and paid for) so I'm going to stick with it.

Good luck.

IN2DEEP 78 CJ5 302 FORD T176/D300 35" BFGS
 

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Check here for some comparison shopping Dave. PermaCool doesn't sell direct but Flex a lite does. They even have a twin fan set up for your CJ (I think- it's over $250 for a TJ). I didn't preview the sites too much (I've been there before but)...PermaCool has a "high performance" 14" that is rated at 2900+/- cfm. (PermaCools standard 16" is only 2000cfm.) I doubt that it's $89 however.......and according to PermaCool JCW does not sell their fans....they do however sell their control thermostats.
http://www.perma-cool.com/Catalog/Contents.html
http://www.flex-a-lite.com/

Here's another site that you might find interesting...http://www.cpi-nj.com/library/thermal/ther_adseries_more.asp

Now if you can just get a "shutter-stat" (I think that's what they call those shutters that open and close on the big rigs) with a moon guy painted on it...........

GeeAea

Figures don't lie ....... but liars sure do figure.
 
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If you want massive over kill put a pusher in front of the radiater and a puller behind it, airflow is a funtion of pressure differential a two stage setup would be overkill.
Hey, on the same thoughts as the shutterstat, How bought a huber reversible fan? then in the winter time you can reverse the fan and run a stove pipe back to the cowl for extra heat. that reminds me its about time to turn the fans on the D7 and the 850.
good luck jjc

 

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Discussion Starter · #5 ·
/wwwthreads_images/icons/tongue.gif Thanks for the commentary, guys. The way this measures out, it will fill the radiator top to bottom. I would have to fab up some brackets. I compared AMPS to AMPS on different size fans to get some idea of the HP and this 16" fan pulls 11.8 full load amps @ 2100 CFM, two nine inch fans pull 11.0 @ a combined CFM of 1300, and a 14 inch pulls 9.3 @ 1600 CFM......It seemed to me that if I put two small motors that there would also be more machinery in the way of the incoming air, and as a rule, larger propellers are a bit more efficient. We run into this same thing on the big transformers that I test, trying to cool a rectangular radiator with round fans. No matter how you place them, you still get thermal patterns of hot-cold areas that are visible to the IR camera. I think I am going to order one of those 16" and the IR camera will tell me in a hurry if it is doing a good enough job. Nothing like having the hi-tech stuff right here in the Jeepshop./wwwthreads_images/icons/smile.gif

CJDave
Quadra-Trac modified by the crack moonguy/wwwthreads_images/icons/wink.gif/wwwthreads_images/icons/smile.gif/wwwthreads_images/icons/tongue.gif transfer case team.
 

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Discussion Starter · #6 ·
/wwwthreads_images/icons/smile.gif The shutters actually did save a little fuel......they made the fan cavitate slightly, and the HP required to run the fan went down. You could hear the fan go into cavitation mode. You mean to tell me that you guys can choose the direction of the airflow? That's neat! I didn't know they HAD that. Some of the bigger generator setups are "packaged" where the whole thing is in a container, and the ROOF is the radiator, so the fan blows OUT the end of the box and the door is gasketed for sealing. You can detect the negative pressure with your ears when you shut the door. The WWII tanks were that way. A friend of ours has a Stuart tank and it's that way. The big problem is if you open the hatches for cool air, less cool air enters through the radiators/wwwthreads_images/icons/frown.gif You're screwed either way.....you heat up or the tank engines do.......it has twin Caddies with GM Hydramatics on them. Circa 1943/wwwthreads_images/icons/crazy.gif

CJDave
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Dave... What happened to the shroud/fan/clutch idea? You remember, this was your suggestion to me approx. 3 months ago. I just got the shroud and fan and clutch about 2 weeks ago and are pleasantly pleased with the setup. This is just a reminder of the simplicity of the whole jeep thing..JMO.....seeya...

Ricky...seeya...
1979 CJ-7 401 T18
 

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Discussion Starter · #8 ·
/wwwthreads_images/icons/smile.gif That is what we really wanted to go to, but the expense was the hangup. It was almost accidental that we saw the 16" fan that JCW had. We did not know they even made one that big. How much did the three items cost altogether.....fan, clutch, shroud..., and were they new? Used? Tell me more....../wwwthreads_images/icons/smile.gif We STILL have one rig to buy clutch and fan for, and that is our '80 GM 3/4T

CJDave
Quadra-Trac modified by the crack moonguy/wwwthreads_images/icons/wink.gif/wwwthreads_images/icons/smile.gif/wwwthreads_images/icons/tongue.gif transfer case team.
 
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CJDave, you are supposed to be able to reverse the direction of the fan, after a season of eating dust pushing a rear engine scraper you decide to reverse the fan, skin your knuckles reaching through the side panels, finaly get to the last blade, it wont turn $%#&, turn all the other blades back, spend the next week spraying PB blaster on the miserable *&%, sucess all the blades turn, next day the weather turns again...
just another day working on antiques
good luck, jjc

 

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Discussion Starter · #10 ·
/wwwthreads_images/icons/shocked.gif Eat Dust? I'm shocked.....they never show that on the films of how-to-be-a-CatSkinner. I just love dumping a scraper downwind and turning back into it with a tracklayer....I do.....I do./wwwthreads_images/icons/crazy.gif We used to have....get this....a 2U D8.....talk about prehistoric. Our neighbor had THE ONLY RD-7 I ever HEARD of. I thought sevens were a recent tractor and never had the RD designation till I looked at theirs./wwwthreads_images/icons/shocked.gif

CJDave
Quadra-Trac modified by the crack moonguy/wwwthreads_images/icons/wink.gif/wwwthreads_images/icons/smile.gif/wwwthreads_images/icons/tongue.gif transfer case team.
 
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I am still working on some of the equipment my grandfather bought when he started out in '63. euclid S-12, TS-14, 955h, D7E47A, D9G66U...not exactly antiques but looking up the backend of a double barrel euc with detroits spewing smoke and oil and the D7 4 cylinder barking out a 7" straight pipe makes you think you should be puttin on a living history display. My grandfathers partner still runs the business, he started out on cletracs, and tells us how spoiled we are, my first machine was an A-C HD6 manual shift, so in an odd way I think he is right. I don't even want to look at an HD6 after running the case 850.
jjc

 

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Dave , you farm guys lost me way back yonder!
I got the new shroud for $65 at the dealer, the new fan clutch at auto zone for a 454 chevy for $35, and the fan at the salvage yard for $10.. I do not know what vehicle it came from, but it is a 20" 7 blade fan. So far it keeps the engine right at the 160' t'stat. It has gotten a little warm here , but not real hot yet. We will see what the engine does when it gets to around 95 and up. Good luck with the CJ....

Ricky...seeya...
1979 CJ-7 401 T18
 

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Discussion Starter · #13 ·
/wwwthreads_images/icons/tongue.gif Ricky....for that kind of dough we would rather HAVE a clutch-driven fan. We got a price of $94 on the shroud/wwwthreads_images/icons/frown.gif $38 on the clutch at NAPA, and $25 on the fan at a wrecking yard. Hmmmmm....I think I'll do some more checking on that shroud...I would RATHER go straight mechanical if I can. You swung a 20" in there huh. That's what we need in this thin air up here when summer comes. We climb 2500 feet in nine miles when we go home to our nest at 4500 ft elev. In the summer vehicles with A/C overheat easily at this altitude. Thanks for the input Ricky.....we are going to analyze this some more before we do anything that might compromise reliability/repairability later on./wwwthreads_images/icons/smile.gif BTW....do you have the part number of the shroud that you ordered? I want to be sure that we weren't quoted on the wrong part/wwwthreads_images/icons/crazy.gif

CJDave
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Dave, I will look for that invoice. I am convienently loosing these receipts. I really do not want to know what I have spent. I ordered it for my '79 cj-7 and it was superseeded by a new part#. My local dealer is pretty good to me on prices also..I think Rosser had a pretty good price on that shroud.I will get back with that part if I find the #...seeya...

Ricky...seeya...
1979 CJ-7 401 T18
 

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Dave,
Get a quote from these guys while you are at it. Just send an e-mail with what you want to:
[email protected]

They always get me good discounts on factory jeep parts.

'79 CJ-7
 

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Discussion Starter · #16 ·
/wwwthreads_images/icons/smile.gif Thanks, guys..... That looks promising. I hope Ricky can find the right number for us/wwwthreads_images/icons/smile.gif

CJDave
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Well Dave, I really think that you're better off with a little redundancy here. Electric fans are not as robust as we'd like to think they are. IMHO, I'd like to suggest you re-think the problem. Using two smaller fans would give you an edge for safety. If you loose one fan, the other should be able to get you home, with a little luck and a prayer, or at least to the parts store. If you put on one fan, and it dies... humm... you're out of comission, totally. Also, have you considered any of the freewheeling fans that are driven by electric motors mounted up by the compressor or alternator? These I don't know much about, but they seem like another alternitive worth looking at. Again, let me state my prefrence, TWO thermostats, TWO fans for redundancy. Dave, you're a "be prepared" kind of guy, so don't take chances with a single point of failure.

Good Jeepin'

Larry
 
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I just bought a 16" electric fan made by imperial from autozone. It was like $65. It seems to push air pretty well. I used it in front along with the 7 blade stock fan and I'm using the HD radiator from my 258. The only problem I had was like someone else mentioned it doesn't quite fit inside the fins. I did this with the radiator still mounted so its not really "fixed" yet. Since it won't fit inside the fins it also hits the grill. I just put some spacers on the radiator to band-aid the problem for now. Fixed the overheating problem but it hasn't got hot yet.

Can you fix it?
I got a welder and a grinder. Heck yeah I can fix it./wwwthreads_images/icons/cool.gif
 

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Discussion Starter · #19 ·
/wwwthreads_images/icons/tongue.gif The only sticker is that this CJ radiator isn't RECTANGULAR enough for the two-fan system. Obviously, that would be the way to go, and the wrecking yards are loaded with fan sets like that. I was already thinking two thermoststatic switches or a manual override at the very least. I've learned a little more about where we might get a shroud with out paying over 90 bucks, and if a shroud can be bought somewhat cheaper, I'd still go with a clutch fan. The electric IS nice.....climbing the grade in August with A/C and not having the big fan clutch in would be nice all right. The single motor IS a concern....no doubt about it./wwwthreads_images/icons/crazy.gifI could two-stage a pair of 16" electrics by stacking, but then I'm as much money as a clutch, fan, and shroud. Two-staging gives more flow and pressure differential, and it would give me a backup/wwwthreads_images/icons/crazy.gif but it would cost about 200 bucks altogether./wwwthreads_images/icons/smile.gif

CJDave
Quadra-Trac modified by the crack moonguy/wwwthreads_images/icons/wink.gif/wwwthreads_images/icons/smile.gif/wwwthreads_images/icons/tongue.gif transfer case team.
 
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When they had a big post on the FSJ board about this same thing there was something said about cost of the clutch fan and the life spam of said clutch.
My pea brain remembers something about had to pay more than the $35 to 45 for a
clutch. Something like $80 to 90 price range for the good clutchs????????
Wish I had remembered more.

 
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