chassis87

Dear all,

I have a baffling issue.

i just installed a half rad from mishi with a 12inch fan from mishi too.

I also fitted a lower temp thermostat and used water wetter as coolant.

The temp gauge stays right in the middle, but the fan does not cut out while car is running.

The temp is 14deg celcius or 57.2deg Fahrenheit currently, however our summers do hit 36deg celcius which is 96deg Fahrenheit.

Im obviously worried that my setup is not able to handle the heat. My car is a 2.4 stroker.

Any ideas?

Thanks!

TrendSetter

iTrader: (1)

how much water wetter did you use?
are you sure there are no air bubbles?

4b11slayer

Fan module

chassis87

1 bottle per 1 gallon

No air bubbles at all.

chassis87

Hmmm? Do explain...fan controller was working well before i changed to 1/2 rad

barneyb

The factory fan is speed controlled. The ECU tells the fan controller what speed to run. So, consider the ECU, controller and fan a system. Other than that I don't know how it works but I think substituting a different fan would change things.

TrendSetter

iTrader: (1)

1 bottle of water wetter per gallon is too much. not sure if it will degrade the cooling capability, but its way more than necessary for it to do its job.
the job of the water wetter is only as a surfactant to reduce the surface tension of the water so the water can transfer heat better. its still the water doing all the work.

chassis87

So should i bypass the fan controller and ecu?

Can anybody shed more light?

Thanks

meckert

iTrader: (11)

Is the fan you installed blowing the rt direction? could have it wired backward, and yes- it will stay warm as a result and hot in the summer if not worse

4b11slayer

The fan might have different resistance/draw from oe fans so it trips out the module.

I hear you can remove module and use power and ground wires and adding a relay

chassis87

Fan wiried in right direction i.e. sucking

Evo9_Dubai

THIS !!!! I had the same issue when I installed my half rad, then I realised my fan was on the other way Now the half rad cools too much !!!! My car is constantly just above the 1/4 of the gauge. I have a defi temp gauge and it shows 165F to 175F. Under load it might go up to 185F but never more.

Also, I control the fan from the ECU, so I have it kick in at 185F instead of 195F

Evo8cy

Now in winter you will not have any issues. Depending on how much power you make your cylinder pressures go up. If you run on the lean side of afr as well then this adds to the heat.




For summer :

-Remove water watter, replace with water and antifreeze.
-Remove fan control module, connect the fan straight on to the harness using a plug. Make sure the fan is correctly polarized. The fan will run constantly.
-Upgrade your rad cap to a 1.3bar one.


With the above you'll be able to run your car during the summer heat without any issues.








Marios

chassis87

Ahmm I know switched back to standard fan on the 1/2 rad and again the same thing,

the temperature gauge reads in the middle.

Yet the fan remains always on, it does not cycle on and off.

when I tested the stock fan vs the mishimoto fan outside of the car, the stock fan is way way more powerfull then the slimline mishi.


P.s. what device does one need to get into the ecu of the CT9A and change the temperature level?

Thank you

chassis87

Hi Marios,

I run about 550-600hp

why do you recommend not using control box?

I already have 1.3bar cap

I am using standard fan with standard plug- I cant switch this around no?