electric radiator fan flows?

[gleem]

looking for 2 electric radiator fans 12" or 14" i think. My 20det cefiro keeps heating up to fast when doing burnouts. So many options on trade me. I heard some were that the fans with the curved blades create more flow?

Heaps of options with oem electric fans that will fit with bmw's, ford's etc.

As im in the market for the non flash american fans could these standard ones be a option? if so would any out preform the aftermarket ones or any with a good rep?

Also can i put a 3rd one some were? i assume fans on both sides of the radiator makes no difference.

[strx7]

put the viscous fan back on, they shift more air than electric ones ever will

[Bazda]

Perma cool ones shift a good amount of air. Have a look on their website they are various types.

[Crucible]

My 20det cefiro keeps heating up to fast when doing burnouts.

How big is your radiator?

[iOnic]

What's the condition of your viscous hub and do you still have the shroud around the fan? Half the time they're worn and can't spin the fan fast enough to pull a good amount of air through the radiator or people take the shroud off and it screws up the airflow through the radiator. I got a spare viscous hub for mine and locked it solid - robbed a bit of power off the engine but kept it very cool when doing things that I shouldn't have been doing

[gleem]

its a big aftermarket alloy one, i will get measurements

[RomanV]

do you still have the shroud around the fan?

+1

If you've just got an electric fan bolted on the back then it might not be so good.

If you need a fan+shroud best bet is pretty much always just going to pick a part and finding something that's approx the right size that will be easy to make fit.

put the viscous fan back on, they shift more air than electric ones ever will

I've heard this a lot.

However, is it just because people put shitty trademe electric fans on with no shrouds, and then decide to go back to viscous?

I can see why the blade designs would be a lot different, as a viscous fan can only at best spin at the rpm of the engine, where as an electric fan can go higher speeds. But I dont see why one would be better than the other as a blanket statement.

I would assume that viscous fans would be simpler/cheaper for manufacturers, and also quieter perhaps?

I'm not disagreeing about viscous being better as I dont know, just wondering.

[iOnic]

I don't think either is better than the other. One just doesn't directly rob power off the crank and viscous hubs are common for freeing up which = overheating. Electric fans either work or don't work, never really heard of people having problems with them and they're only running when you need them (if hooked up to a temp sensor)

[gleem]

yeah, had a twin electric set up of some nissan with the 2 shrouds. it never really did heaps of cooling. my friends ones sound and feel like its moving alot of air (trade me fan).

People ive seen use 1 or 2 fans and some alloy sheet metal as a shroud. But im not to keen to spend that much for it to bent around a lamp post.

What if i put 2 on radiator and and 1 or 2 on front mount with is 200 -300mm infront?

[Grrrrrrr!]

People ive seen use 1 or 2 fans and some alloy sheet metal as a shroud. But im not to keen to spend that much for it to bent around a lamp post.

So do it right, then keep the drifting on the track where there are no lampposts!

[d1 mule]

in my experience "big alloy" radiators cause more problems than they are worth.

couple years ago there were a bunch of guys in drift south that had huge issues with aloy rads, like $&#$% engines all over the place/constantly overheating.

waste of time imo

[gleem]

the tracks are 45 - 60 mins away and albany is 2 minutes away

[Crucible]

in my experience "big alloy" radiators cause more problems than they are worth.

couple years ago there were a bunch of guys in drift south that had huge issues with aloy rads, like $&#$% engines all over the place/constantly overheating.

waste of time imo

Really?, I wonder why?

I would of thought extra flow would be an advantage alloy or not.

[Bling]

Should mount the radiators on the side since they go sideways more often than forwards?

[d1 mule]

in my experience "big alloy" radiators cause more problems than they are worth.

couple years ago there were a bunch of guys in drift south that had huge issues with aloy rads, like $&#$% engines all over the place/constantly overheating.
waste of time imo

Really?, I wonder why?
I would of thought extra flow would be an advantage alloy or not.

Im no hydraulic/thermal engineer but my best guess would be that due to the large increase in radiator capacity, the water flow in the radiator would slow down to a point where there wasnt enough water circulation to cool anything.
Couple that with the fact that once the alloy tanks etc get hot they will be acting like big heaters also hindering the cooling ability of the radiator.

might not be how it works but from what iv seen they cause more harm than good if oversized, specially in drift/skid cars

[holden_fan2005]

What about going back to stock with the addition of twin (decent..) electric fans pushing from the front?

A guy who always enters our burnout comps runs like an intercooler type sprayer too. Could try that with iced water/CO2. If you get to the point where it's cooling super duper well a electric pump to increase flow?

[AE82 FXGT]

in my experience "big alloy" radiators cause more problems than they are worth.

couple years ago there were a bunch of guys in drift south that had huge issues with aloy rads, like $&#$% engines all over the place/constantly overheating.
waste of time imo

Really?, I wonder why?
I would of thought extra flow would be an advantage alloy or not.

Im no hydraulic/thermal engineer but my best guess would be that due to the large increase in radiator capacity, the water flow in the radiator would slow down to a point where there wasnt enough water circulation to cool anything.
Couple that with the fact that once the alloy tanks etc get hot they will be acting like big heaters also hindering the cooling ability of the radiator.

might not be how it works but from what iv seen they cause more harm than good if oversized, specially in drift/skid cars

Sorta like the bigport/smallport heads, you gain flow but lose velocity .

[sergei]

Im no hydraulic/thermal engineer but my best guess would be that due to the large increase in radiator capacity, the water flow in the radiator would slow down to a point where there wasnt enough water circulation to cool anything.
Couple that with the fact that once the alloy tanks etc get hot they will be acting like big heaters also hindering the cooling ability of the radiator.

might not be how it works but from what iv seen they cause more harm than good if oversized, specially in drift/skid cars

That does not make any sense.
It is better for water to slow down in the radiator for very simple reason - heat transfer is not instant. The slow speed of water in the radiator does not affect how well water moves in the block. Pump still pumps same volume of water through block.

Imagine huge reservoir of cold water on one end, and another empty reservoir of water on other end instead of radiator. Water flows through engine from full reservoir to empty.Will this make cooling worse because water does not move between reservoirs directly (as long as there is water in cold reservoir)?

[d1 mule]

^ as i said it was a guess and what you said does make sense.

there must be something in it tho. everyone that went to hte massive V8 size radiators changed back to stock or similar to stock sized alloy versions.

[1I1]

Possibly poor quality with lack of fins to help dissipate heat maybe?