I like my original 16 blade metal one.. less noisy than the plastic ones, and the blades don't fall off...
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| Which radiator fan https://www.ausmini.com/forums/viewtopic.php?f=2&t=6823 |
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| Author: | Mike [ Mon May 02, 2005 9:02 am ] |
| Post subject: | Which radiator fan |
Whats the wisdom on fans - Is the 4 blade (2+2) fan any good (its the contoured one not the straight one). How is it in terms of cooling and noise compared to the multibladed plastic \ metal fans? |
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| Author: | Lillee [ Mon May 02, 2005 9:18 am ] |
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I think plastic fans are more aerodynamically efficient at low speeds but at higher speeds the fewer bladed fans work better... something like that. I think the 16 blade one uses up HP when spun at high speeds or something like that. To counter that problem people cut a few inches off the blades of a plastic one so that it works well at low speed and doesn't take up HP at high speed... Since it's a road car (ie, stopped in traffic 80% of the time) just use the plastic one! |
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| Author: | awdmoke [ Mon May 02, 2005 1:53 pm ] |
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Read Vizard, but the gist of it is: More blades: less noise, less efficient (consumes more power) Less blades: more noise, more eficient (consumes less power) The 4 blader is a good balance for a road/racer. The two bladers are like having a helicopter in the engine bay. |
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| Author: | drmini in aust [ Mon May 02, 2005 4:38 pm ] |
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I like my original 16 blade metal one.. less noisy than the plastic ones, and the blades don't fall off...
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| Author: | Boostedmini [ Mon May 02, 2005 4:47 pm ] |
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i have read that the plastic one is the best of both worlds a tad noisey (your in a mini its always noisy) but cools well at all speeds, ( if you cut a few inches off the blades of the platsic one it would be a spinning hub with no blades) |
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| Author: | danidad [ Mon May 02, 2005 4:53 pm ] |
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without upsetting anyone i cant imagine that a fans blade count can make that much difference in power consumption.. and cutting blades doesnt sound that good an idea unless it was precision done or its going to wobble ... |
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| Author: | awdmoke [ Mon May 02, 2005 5:15 pm ] |
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Never a good idea to just hack at rotating parts. Metal blades can be flattened slightly if you don't need so much air flow (road/racer). You can save 1-2hp by swapping the fan on a std engine. Not much, but it's cheap. Can save up to 10hp by going electric or fanless on a performance engine. Some racers get by without one, but not feasable in a road car - hard enough to keep em cool as it is 
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| Author: | Mike [ Mon May 02, 2005 5:20 pm ] |
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No Vizard says to chop a few cm of the ends in the bible. But Vizard is a racer and writes for racers who dont care what their fan's like when at 90mph. Plus half of his info is UK based (the other is Californian) and they wouldnt have as many overheating problems. Funnily enough, a few days ago my radiator cap blew off and fell into the plastic fan (dont ask how) and broke 3 blades and one in half - the fan is actualy cooling better now! Everybode says that the plastic ones are shaped more aerodinamicaly but the plastic fins appears to me to be pretty straight, the metal 4 blade ones seem more curved. I want a good performer in the traffic without sounding like the end scene of "Miss Saigon". So basicaly what I'm asking is the 4 blade metal one a decent performer and a possible replacement for my brocken plastic fan? |
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| Author: | drmini in aust [ Mon May 02, 2005 5:35 pm ] |
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Cop S's had the 4 blade.
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| Author: | FatMaserati [ Mon May 02, 2005 6:31 pm ] |
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Why not get a 6 blade 
http://www.minisport.com/classic-mini-shop/products/mini-sport-performance-engine-tuning/cooling/fans-and-belts/6-blade-steel-fan-yellow-product.html |
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| Author: | TheMiniMan [ Mon May 02, 2005 6:40 pm ] |
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I use a 4 blade in both my road mini & my race mini,,,i like the slight "Whir" noise that it makes 
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| Author: | Fat80y [ Mon May 02, 2005 7:08 pm ] |
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I think you're all wasting your time with a mechanical fan. I recently had one of my spare radiators converetd to take a recovery type cap - so while the old one was out, cut out the grill in the inner wing and installed a thermo fan from a Ford Telstar ($20 at wreckers). Works a charm - not that I had overheating issues previously (stocko 998!) but it has allowed me to piss of the mech fan, shroud etc which makes maintenance at this end of the engine so much easier!!! So much more room... |
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| Author: | drmini in aust [ Mon May 02, 2005 7:43 pm ] |
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Hmmmm I've got a spare thermatic fan off a ???, might be time to think about fitting it..
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| Author: | min13k [ Mon May 02, 2005 7:54 pm ] |
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i had one of the 4 blades and took it of it was getting warm in traffic in sydney so tried a mettle fan and it worked better at keeping the car cool but this was only in my experiance please dont belive it will work cos it may not in your situation i surly dont want to give misinfomation as i may get introble makka |
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| Author: | aaron [ Mon May 02, 2005 7:58 pm ] |
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I have thermo fans on both mine. Very much needed when sitting in traffic on a 40degree day. Cheers Aaron |
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