Thursday, November 08, 2007 - 09:57 pm, by: Francisco Valdivia(Silvasoarer)
Can anybody out there give me some hands on advice about the placement of Thermo fans. (1)Is it better/are they more efficient to have them mounted in the engine bay drawing the air thru the radiator, or (2)Is it better/are they more efficient to have them mounted in front of radiator and pushing cool air thru, and (3)if they are fitted both front and rear of the radiator, will this be more efficient still.
Steven Nanevski Goo Roo New South Wales HKS T3G equipped TT coming soon...
Thursday, November 08, 2007 - 10:50 pm, by: Steven Nanevski(Imprestik)
Seriously, don't bother with them, if you want to run your car cooler, just get a TRD thermostat. $50 and you cant go wrong, don't waste your time mate, stock setup is more than adequate enough.
Friday, November 09, 2007 - 08:26 am, by: Francisco Valdivia(Silvasoarer)
Cheers Steven. Thanks for the advice dude. The reason I ask is not for my Soarer, as yes it is more than adequate, but for a Toy car I own. Its a 76 Mazda coupe and it seems to get a little warm under the collar. It has already a set of thermos in the engine bay drawing the air thru the radiator. But I was wondering if there was more I could do to keep the old girl happy. Because when it is a warm day, she gets a bee in her bonnet (13B J-port) and becomes a Pig and Grummpy lol I have talked to a few "authorities" on this but some say the fans in front of the radiator is best because it is pushing cold air thru and they have seen many car manufacturers do that to their vehicles. The other advice is that the draw thru method works better because it is sucking the cool air thru the radiator, and once again many car manufacturers do this as well. And last but not least, I have seen cars with them fitted to both front and rear of the radiator So I guess I wanted to post this and hopefully a Cooling Guru could assist as summer is nearly upon us.
Friday, November 09, 2007 - 08:37 am, by: David Vaughan(Davidv)
I am not a cooling guru but my guess is that in front or behind would make no difference in itself, all else being equal. However, the "equal" things include, how close is the fan to the radiator, and what is the airflow region like in front of a front fan or behind a rear fan? Imagine having no fan and that the fan is an obstruction to air flow. Now, where can you mount it adjacent to the radiator so that obstruction to natural air flow is least? I suspect that will be the optimal spot when the fan accelerates the flow.
Two fans could be used to increase air flow speed where you can not fit a larger fan. They will also slow down the air flow more when the fans are off (more air drag -- two fans for the air to turn).
Friday, November 09, 2007 - 02:55 pm, by: Peter Nitschke(Pen)
Better yet, find out why it's getting hot and fix the problem. The radiator might be clogged or the thermostat could be sticking. Apart from that, drive around with the heater on full blast.
Friday, November 09, 2007 - 11:19 pm, by: Francisco Valdivia(Silvasoarer)
I truly enjoy the drive in my Soarer. I really do. But you must understand, prior to experiencing the Soarer experience, I had the Rotary. Yes they get hassled for being chook cookers, rice burners, sounding like lawnmowers, whatever..... but the truth is when you have the Rotary blood pump thru you, its unlike any experience you have. You either love them or hate them. It don't get any simpler. If you get the opportunity to travel in one, give it a go....if its a turbo rota, you'll see what I mean. If you don't, well it don't matter.
Yes, yes I know, wrong forum. But as much as I am part of and respect the rotary community, there is a few turds, and sometimes we need to search for answers in a (hopefully) more educated part of the world. Hence my question here. Cheers guys for the input.
Ben Socratous Goo Roo SA I am the fibreglass/kevlar/carbonfibre king!
Saturday, November 10, 2007 - 12:42 am, by: Ben Socratous(Socrates)
Fans will flow better mounted on the front of the core, pushing the air through it rather than behind trying to pull. Having said that If you can fashion some sort of shroud for the rear of the radiator and have the fan(s) mounted into that so that they pull through the ENTIRE core, that will yield the most efficient setup.
Saturday, November 10, 2007 - 10:32 am, by: David Vaughan(Davidv)
A fan in front of the radiator loses some flow through tip spill and bounce while one behind sucks air from the gap between fan tips and radiator rather than through it so, really, behind or in front is nowhere near as important as having a shroud to contain those losses. Even a crude cylindrical one, rather than full radiator face, will help, and equally so whether in front or behind if you optimise external air flow into or away from the fan.
Sunday, November 11, 2007 - 08:57 am, by: Francisco Valdivia(Silvasoarer)
Thanks guys, fantastic information. The fans I have are DaviesCraig / CraigDavies?? and they have a small shroud that they are placed in. I guess if they have been designed and sold this way then they are efficient to use without an overall shroud. Would this be right?
Wednesday, November 14, 2007 - 05:29 pm, by: Steven Nanevski(Imprestik)
Cara Joseph wrote on Wednesday, November 14, 2007 - 09:22 am:
-3 weeks from nengun you wish hahahaha 8-10weeks and thats only if they have it in supposide stock.
I wish, no I don't , everything I have ordered from nengun has come within 3 weeks. When I ordered my E-manage Ultimate it took 10 days from purchase. Also when I ordered my second batch which was radiator cap, thermostat, oil cap and the like, that took around 3 weeks from purchase date. If you order individual stuff, it doesn't take as long as if you order a bunch of stuff, cause he gets all his stuff from different suppliers.
Don't know what you guys are smoking down there in Melbourne...
Friday, November 16, 2007 - 11:42 am, by: Braden Murdoch(Ribfeast)
Quickest I have ever got anything from Nengun was a couple of weeks. And my RSM took 3-4 months Greenline FTW!
Better to have the rad fans on the back (engine side) of the radiator, otherwise the motor and finger guards on the fans will interrupt the flow. A shroud as mentioned above will improve things even further.
Previous
Thanks for the advice dude. 
and Grummpy 
lol 
because it is pushing cold air thru and they have seen many car manufacturers do that to their vehicles. 
but the truth is when you have the Rotary blood pump thru you, its unlike any experience you have.
