Supra mk3 electric cooling fan

[Alan]

I would like to put somthing in on this, I am running electric fans and I have to keep on turning down my thermostatic switch so I can get the cars temp to come up to normal. So I would say my electric fans work to well. The other thing is are you guys still running your cars with the AC condensor? if so that is why you are not getting enough flow thru your radiators due to the restriction, and how I know this is when I installed the fans I had the cooling problem but when I took out the AC condensor and cleaned the radiator I had better flow. As for the power draw I am dealing with that problem now but I am planning on running an inline relay to cut back on the mad draw when the fans come on.

 

[Zumtizzle]

http://www.supraforums.com/forum/showthread.php?t=505386

This is what i'm doing if i come across IS300 fans.

 

[Supracentral]

Now those fans will likely work well. OEM fans tend to be up to the task, but aftermarket ones generally are not.

 

[SideWinderGX]

Inline relay is the way to go. Also with the inline fuse, put bullet terminals on it in case you have to swap out the inline fuse wire due to a short/electrical gremlin...it'll save you so much time if the fuse ever blows and melts the fuse holder with it.

 

[mattsplat72]

Will a hydro fan set up from a 1j work with a 2j if so I have the whole set up minus the lines I will sell and ship for cheap if you like just let me know if you would like to go that direction

 

[Rennat]

That is300 setup looks really really nice. especially with the res. being in the middle... but will it fit an mk3?

 

[Poodles]

I would like to put somthing in on this, I am running electric fans and I have to keep on turning down my thermostatic switch so I can get the cars temp to come up to normal. So I would say my electric fans work to well.

That's the job the the thermostat, if you're cooling too well it's not functioning properly.

The other thing is are you guys still running your cars with the AC condensor? if so that is why you are not getting enough flow thru your radiators due to the restriction, and how I know this is when I installed the fans I had the cooling problem but when I took out the AC condensor and cleaned the radiator I had better flow.

Some of us use A/C and removing it isn't a logical fix for fans that don't flow enough.

As for the power draw I am dealing with that problem now but I am planning on running an inline relay to cut back on the mad draw when the fans come on.

Stock e-fan setups fail OPEN, meaning if the sensors fail, the fans default to ON. Aftermarket doesn't do it this way, and 99% of the installs I have seen don't as well...

Overheating an engine is BAD, overheating an inline six with a long head that warps is even worse. Unless you have a mechanical failure (rare), the stock setup won't fail bad enough to get you in serious trouble...

 

[Alan]

That's the job the the thermostat, if you're cooling too well it's not functioning properly.



Some of us use A/C and removing it isn't a logical fix for fans that don't flow enough.



Stock e-fan setups fail OPEN, meaning if the sensors fail, the fans default to ON. Aftermarket doesn't do it this way, and 99% of the installs I have seen don't as well...

Overheating an engine is BAD, overheating an inline six with a long head that warps is even worse. Unless you have a mechanical failure (rare), the stock setup won't fail bad enough to get you in serious trouble...

The reason why I have to turn it down is because the motor is running to cool to were the thermostate will not open all the way or it takes to long to warm up. As for the AC condensor, my AC did not work any more and I did not want to pay to convert mine. As for the last portion if one of my sensors fail and I notice the temp rising above normal I have an override switch to turn on the fans until I want to shut them off.

 

[Poodles]

It won't matter, the t-stat should be closed which means no radiator flow, so the fans wouldn't overcool unelss the t-stat is faulty.

What if someone else drives your car and the sensor fails? Or you don't notice the temp rising?

Durability and reliabilty = redundancy and failsafes. People aren't infallible...

 

[Who]

Read this article "The Myth of the Electric Fan" The author did a good job at covering the positives, negatives, and misconceptions on the electric fan setup. IMHO

My personal opinion on the stock fan setup vs electric fans. "Keep it simple" The electric fan setup can fail in a multitude of ways vs the pulley and belt method. For example. The most common cause of a overheat on a front wheel drive car is what?....Failure of the electric fan motor, the fuse, temp sensor, all related to the electric fan. Mechanical fan failures causing a overheat on rear wheel drive vehicles are few and far between.

And Poodles is right. Your thermostat is toast.

 

[super.secret.supra.club]

this is a really good thread. subscribe!

ed.d.

 

[SideWinderGX]

Read this article "The Myth of the Electric Fan" The author did a good job at covering the positives, negatives, and misconceptions on the electric fan setup. IMHO

My personal opinion on the stock fan setup vs electric fans. "Keep it simple" The electric fan setup can fail in a multitude of ways vs the pulley and belt method. For example. The most common cause of a overheat on a front wheel drive car is what?....Failure of the electric fan motor, the fuse, temp sensor, all related to the electric fan. Mechanical fan failures causing a overheat on rear wheel drive vehicles are few and far between.

And Poodles is right. Your thermostat is toast.

Ignoring that guy's points about the stock harness/stock alternator/stock thermostat getting stressed (car specific, and you should always run new wires to not be dependent on the stock wiring, duh), he only has a few somewhat valid points about electric fans....which I will try to invalidate:

-The fans draw whatever amperage is allowed by the fuse. It is not determined by the horsepower it claims to save, it is determined by the fuse.
-Calling a radiator fan unnecessary, in ANY condition (including at speed) is purely idiotic.
-It is not a drain on the system unless you want to run a huge system along with the fans...that might become a problem :icon_razz
-The failure points he mentions are valid, but just because there are more failure points doesn't automatically means it happens OFTEN. The rate at which an electric fan fails, for whatever reason, is extremely small. Wiring/thermostat can be attributed to the user not using good parts. Fuses blowing is faulty wiring. Physical damage is the same as a mechanical fan.



I still don't see such a big difference.

 

[Rennat]

True Story.

86.5, n/a, 5-speed, rebuilt, good running coolant system.
e-fan was wired to a switch in the cabin and that was it.
I didnt use the fan at all for the longest time... not until the temps got up to 90+ while sitting in traffic. And other than that, i didnt need the fan. The radiator cooled the coolant more than enough and the thermostat kept the system at the right temp.

Now a turbo supra is entirely different than a non-turbo supra...

 

[jetjock]

One point you and other proponents of e-fans are completely missing is how adding digital control to one of what was previously a set of dual interacting analog feedback loops upsets the variable trying to be maintained. It's one of the biggest problems with using electric fans. I can't comment on the fan/fuse/amperage thing because I've read it 20 times and still dunno what to say....

 

[zoonwen]

Yes It will work with the aristo 2jz, driftmotion sells the hi pressure line =D

Will a hydro fan set up from a 1j work with a 2j if so I have the whole set up minus the lines I will sell and ship for cheap if you like just let me know if you would like to go that direction

 

[IJ.]

One point you and other proponents of e-fans are completely missing is how adding digital control to one of what was previously a set of dual interacting analog feedback loops upsets the variable trying to be maintained. It's one of the biggest problems with using electric fans. I can't comment on the fan/fuse/amperage thing because I've read it 20 times and still dunno what to say....

"My brain hurts" comes to mind

 

[Who]

-The fans draw whatever amperage is allowed by the fuse. It is not determined by the horsepower it claims to save, it is determined by the fuse.

?

-The failure points he mentions are valid, but just because there are more failure points doesn't automatically means it happens OFTEN. The rate at which an electric fan fails, for whatever reason, is extremely small. Wiring/thermostat can be attributed to the user not using good parts. Fuses blowing is faulty wiring. Physical damage is the same as a mechanical fan.

The failure points he mentions are valid, and because there are more failure points it happens more often.

Regardless of my disagreement with your line of thinking I wish you the best in your endeavors. :drink1:

I'm out of here.

 

[cmdeoro]

hmmm.. how many cfm does the fan clutch provide... anyone know?

 

[SideWinderGX]

?

Go read the website posted dude. The writer went on a tangent discussing how many amps the fan draws, getting a number somewhere around 70 amps....then adds in a 30% inefficiency rating just because he feels it is needed. So suddenly the fan is drawing nearly 100 amps according to his calculations. Which is plain wrong...any electric fan you set up has a required fuse, the highest I know of are Taurus fans (40 amps I believe). Nowhere near the 100 he's talking about.

The failure points he mentions are valid, and because there are more failure points it happens more often.

Regardless of my disagreement with your line of thinking I wish you the best in your endeavors. :drink1:

I'm out of here.

LOL, so you're saying that rotary engines, because they have less failure points, are more reliable than other engines? :biglaugh: Ok.

 

[SideWinderGX]

hmmm.. how many cfm does the fan clutch provide... anyone know?

Noone knows. The general answer people respond with is 'more than electric fans', which is never backed up with any substantial data.