dual electric fans
04-02-09 | 05:01 AM
#1
Thread Starter
Coolant Leak
Joined: Aug 2005
Posts: 490
Likes: 0
From: Dallas, TX
dual electric fans
Ok, i searched and didnt see any evidence of anyone having done this so please correct me if i'm wrong in that..
Heres my idea, so you have your efan that is pulling air through the radiator on the inside of the engine bay, what if i put another efan on the other side of the radiator that was pushing air through, has anyone done this? Do you think i would see noticeable changes in cooling or would it just be a substantially unnecessary overhaul on the alternator?
Let me know your thoughts
Heres my idea, so you have your efan that is pulling air through the radiator on the inside of the engine bay, what if i put another efan on the other side of the radiator that was pushing air through, has anyone done this? Do you think i would see noticeable changes in cooling or would it just be a substantially unnecessary overhaul on the alternator?
Let me know your thoughts
04-02-09 | 06:47 AM
#3
One on the other side as in a smaller fan or one of the same size?
If smaller than it may help a little, sort of like the smaller fan that came on turbo models and other certain models.
If the same size then I would think it would just be a waste and even hurt cooling while in motion due to it blocking the incoming air.
1 good sized good flowing E-fan will do the job right which would even be cheaper, and as you said yourself it would be less of a load on the alternator as you only need 1 fan instead of 2.
If smaller than it may help a little, sort of like the smaller fan that came on turbo models and other certain models.
If the same size then I would think it would just be a waste and even hurt cooling while in motion due to it blocking the incoming air.
1 good sized good flowing E-fan will do the job right which would even be cheaper, and as you said yourself it would be less of a load on the alternator as you only need 1 fan instead of 2.
04-02-09 | 07:14 AM
#4
The type of fans we use are more efficient pulling air rather than pushing.
The only reason you see some cars with "pusher" fans is due to space constraints, not because it's in any way better.
When the car is at speed- and the fans are probably not active- your front-mount fan is blocking airflow to the radiator.
Finally, having a push/pull fan setup is not twice as efficient as either/or.
Unless the two fans are perfectly matched- much harder to achieve than you'd think- one fan is actually fighting the other for air. Typically, it'll be the second fan, in this case the inner,"puller", fan that suffers and it should be the most productive but won't be in this case.
So essentially, you're doubling the current draw without getting twice- or even 50%- the cooling improvement.
A far better investment of time/material would be to concentrate on the fan shrouding- both to the rad and on the fan side.
Moving the fan away from the radiator- most installs put it right on the matrix (core)- minimizes the fan hub's "dead spot", which can be quite large with some fans.
Shrouding from the nose intake to the rad ensures that all the air that comes in actually makes it through the rad core instead of spilling around it.
Remember, air, like liquid, wants to take the path of least resistance and to an air molecule the radiator core looks like a brick wall...it would much prefer an easier passage.
All of this blathering begs the question...how much better does your cooling need to be?
By far, the easiest and biggest "bang-for-the-buck" improvement you can make is to increase the size of the radiator core itself.
The only reason you see some cars with "pusher" fans is due to space constraints, not because it's in any way better.
When the car is at speed- and the fans are probably not active- your front-mount fan is blocking airflow to the radiator.
Finally, having a push/pull fan setup is not twice as efficient as either/or.
Unless the two fans are perfectly matched- much harder to achieve than you'd think- one fan is actually fighting the other for air. Typically, it'll be the second fan, in this case the inner,"puller", fan that suffers and it should be the most productive but won't be in this case.
So essentially, you're doubling the current draw without getting twice- or even 50%- the cooling improvement.
A far better investment of time/material would be to concentrate on the fan shrouding- both to the rad and on the fan side.
Moving the fan away from the radiator- most installs put it right on the matrix (core)- minimizes the fan hub's "dead spot", which can be quite large with some fans.
Shrouding from the nose intake to the rad ensures that all the air that comes in actually makes it through the rad core instead of spilling around it.
Remember, air, like liquid, wants to take the path of least resistance and to an air molecule the radiator core looks like a brick wall...it would much prefer an easier passage.
All of this blathering begs the question...how much better does your cooling need to be?
By far, the easiest and biggest "bang-for-the-buck" improvement you can make is to increase the size of the radiator core itself.
04-02-09 | 01:58 PM
#5
Thread Starter
Coolant Leak
Joined: Aug 2005
Posts: 490
Likes: 0
From: Dallas, TX
yeah this all makes sense, which is why i wanted to hear some opinions, realistically i guess my cooling is pretty good, i have a fluidyne, completely covered by a fiero efan. I just thought of this idea when i finished diagnosing my cooling problem... the fan was blowing the wrong way..
04-02-09 | 05:26 PM
#7
I have dual electric fans, just not the way you want yours to be setup. I use a maxima 3.0v6 calsonic fan setup from the 90's model year, I have a low speed and a super crazy high speed setup on a toggle and the shroud/fans fit the whole radiator.
