I'm in the middle of eliminating my clutch fan to swap it out for a dual electric fan setup, but I was wondering if there was any shorter belts that could bypass the fan pulley. I was about to put on a brand new belt, but if I can go ahead and get a shorter belt I can save that much more drag.

 

Use a string to get a measurement,if you happen to do the swap would you pm me with your results of which fan you go with.thanks

 

^x2 The string method works great. We added a OBA compressor on my blazer and I wanted to keep the AC working also, and couldn't figure out the length, until my son said, just measure it with string.

 

Hmmm... another question. If I do bypass the fan pulley, will there be enough belt on the alternator to keep it from slipping? Is there a certain amount of surface area that needs to be covered for certain pulleys like that? I might need to leave the fan pulley there if that's the case.

 

Thats why its the norm to leave the pulley on. It wont rob you of power and keeps the belt tight on the ALT.

Just remove the studs and use bolts for the pulley.

 

That was my next step, to get bolts instead of studs. Then I'll have more room for the fan.

 

dont the fan bolt to the water pump

 

Not on mine, it's a separate pulley beside the water pump.

 

not v4.0 hugh the string method is the easiest and count vgrooves in belt or take old belt to store

 

Ok, so the conversion is having to go on hold for a bit. I need this thing on the road ASAP, and I'm still in the "planning" stage. I was ditching both stock fans and going to replace them with electric fans.

I know I need at least 2000 cfm to stay cool, but 3000 cfm for things like climbing and towing (which I won't be doing much of... if at all). So, I was planning on going somewhere in-between.

I have one used 10" electric fan that fits so neatly on the radiator that it would be absolutely perfect, but I don't know what company made it, how many amps it uses, how many cfms it flows, or anything useful. The closest thing I could find with a good old google search looked nearly EXACTLY like it, it was a 5.3 amp and 650 cfm fan... nowhere near good enough.

Mr. Gasket makes a 950 cfm fan that draws 8.3 amps. two of those would get CLOSE to 2000, but I don't want to be under and overheat. With a little crafty customization, I believe I could squeeze two of those and my current used fan across the 31" radiator. I'd need to shave the shrouds slightly though.

Then, there's this: http://compare.ebay.com/like/2805772...=263602_304662

1570 cfm!?! Two of those would be PERFECT!!! And they're only $24!?!

I dunno... sounds fishy to me. What do you guys think? Nana.outpost has a good rating on eBay. And, if they do what they say for that cheap, they are 11.55 amp, which is quite a draw with two of them on separate relays. Would I need to worry about my altenator being able to keep up?

 

I like the electric fan!!! I have that planned for my Heep as well!

 

I say just do it and if your alternator falls short then just switch out a Grand cherokee alternator, it puts out more and im pretty sure theres a write up on it somewhere on here, takes minimal modificaton to make it fit, like a little gringding on the mount or something like that

 

I think I'll try it then. The dimensions should be just right to squeeze between the engine and radiator and easily fit two in there, and they are only 24 bucks shipped...

I guess I ain't got much to lose. When I get it done I'll post the results.

But I'm still skeptical. 1570 cfm from a 10" fan? And for that cheap I'm expecting low quality... and low quality doesn't usually add up to high performance.

 

Actually, I'm too skeptical that it will work as stated. I don't see anywhere a name brand for that cooling fan, and I don't trust it if I don't know who manufactured it. I will keep searching for a good dual 10" fan setup in the meantime.

 

google search spal dual 10 inch cooling fans just seen them