Adjusting radiator fan temps

[ML]

First, do you think that kicking the radiator fans on at lower coolant temps would be a good idea?

Second can anyone interpret these tables?


I was reading a post on NAOSIC that kinda explained it but I still don't know what the fan modes are exactly (http://forums.nasioc.com/forums/show....php?t=1828462)

[DJCarbine]

This would need to be coupled with a lower temperature thermostat, or else the fans would likely be running constantly and not really doing much.

On topic of lower temp thermostats, I'm not a fan (pun intended)

[fstlane]

Originally Posted by ML

First, do you think that kicking the radiator fans on at lower coolant temps would be a good idea?

Second can anyone interpret these tables?


I was reading a post on NAOSIC that kinda explained it but I still don't know what the fan modes are exactly (http://forums.nasioc.com/forums/show....php?t=1828462)

I used the NASIOC link as a guide and came up with these fan profiles. Both fans should be set on by 200°F regardless of whether the a/c is on or not. @Dezoris mentioned in a post he's been running a similar 200°F fan profile both on and off track for 7 months with no I'll effect.

[ML]

Originally Posted by fstlane

I used the NASIOC link as a guide and came up with these fan profiles. Both fans should be set on by 200°F regardless of whether the a/c is on or not. Dezoris mentioned in a post he's been running a similar 200°F fan profile both on and off track for 7 months with no I'll effect.

Any positive effects noticed?

[charged86]

i would like to know the wire that activates so i could have and external switch for track days. turn it on with the hood up. sounds dumb but it will move that hot air around which is smart.

[nelsmar]

I lower these values on my own car as my intercooler heatsoaks at idle from the extreme pavement temperatures in phoenix even if my coolant temp is acceptable. Leaving the fan running non stop will keep my IAT lower and keep air flowing through my bay.

[Dezoris]

Originally Posted by ML

Any positive effects noticed?

The biggest issue is idle scenarios for most users.
Car sits and builds heat fast with the sealed bay.

Stock Fan Activation 212F
So normal cruising temps in my testing. (8 months)
Coolant: 190F-197F
Oil: 190-205F
IAT: 70-115F (Depending on conditions)

Once you come to a idle stop with normal fan activation points:
Coolant: 200-213F
Oil: 195-215F
IAT: 100-130F

Lowering the coolant fan activation point to 200F drops these idle numbers down about 10-15F during idle and keeps the fans on solid during track operation keeping coolant temps lower. If you have an liquid to air oil cooler up front there are big reductions in oil temps from this as much as 10-20F depending on the core during a 20-30 minute track session.

Idle Temps with 200F Fan Activation:
Coolant: 194-202F
Oil: 190-200F
IAT: 90-120F

IMPORTANT

Setting the temp any lower than 200F will likely cause it to run all the time which clearly is stress on the fan motors. You will only see 200F coolant temps during harder runs and idling. But normal cruising with airflow temps usually stabilize between 190-197F.

[ML]

Originally Posted by Dezoris

The biggest issue is idle scenarios for most users.
Car sits and builds heat fast with the sealed bay.

Stock Fan Activation 212F
So normal cruising temps in my testing. (8 months)
Coolant: 190F-197F
Oil: 190-205F
IAT: 70-115F (Depending on conditions)

Once you come to a idle stop with normal fan activation points:
Coolant: 200-213F
Oil: 195-215F
IAT: 100-130F

Lowering the coolant fan activation point to 200F drops these idle numbers down about 10-15F during idle and keeps the fans on solid during track operation keeping coolant temps lower. If you have an liquid to air oil cooler up front there are big reductions in oil temps from this as much as 10-20F depending on the core during a 20-30 minute track session.

Idle Temps with 200F Fan Activation:
Coolant: 194-202F
Oil: 190-200F
IAT: 90-120F

IMPORTANT

Setting the temp any lower than 200F will likely cause it to run all the time which clearly is stress on the fan motors. You will only see 200F coolant temps during harder runs and idling. But normal cruising with airflow temps usually stabilize between 190-197F.

Are you on stock rad?

[Dezoris]

Originally Posted by ML

Are you on stock rad?

Part of the testing I was, the numbers are similar except the recover time is much faster with Koyo after fans cycle on.

[kombatlion]

So how we set the fans to 200F?

[ML]

Originally Posted by kombatlion

So how we set the fans to 200F?

If you have to ask, you probably shouldn't. All the info is in this thread.

[kombatlion]

Originally Posted by ML

If you have to ask, you probably shouldn't. All the info is in this thread.

You could have told me: take it to your ecutek tunner he can do it... but thanks anyway!

[ML]

Originally Posted by kombatlion

You could have told me: take it to your ecutek tunner he can do it... but thanks anyway!

take it to your ecutek tunner he can do it

[sw20kosh]

Originally Posted by Dezoris

The biggest issue is idle scenarios for most users.
Car sits and builds heat fast with the sealed bay.

Stock Fan Activation 212F
So normal cruising temps in my testing. (8 months)
Coolant: 190F-197F
Oil: 190-205F
IAT: 70-115F (Depending on conditions)

Once you come to a idle stop with normal fan activation points:
Coolant: 200-213F
Oil: 195-215F
IAT: 100-130F

Lowering the coolant fan activation point to 200F drops these idle numbers down about 10-15F during idle and keeps the fans on solid during track operation keeping coolant temps lower. If you have an liquid to air oil cooler up front there are big reductions in oil temps from this as much as 10-20F depending on the core during a 20-30 minute track session.

Idle Temps with 200F Fan Activation:
Coolant: 194-202F
Oil: 190-200F
IAT: 90-120F

IMPORTANT

Setting the temp any lower than 200F will likely cause it to run all the time which clearly is stress on the fan motors. You will only see 200F coolant temps during harder runs and idling. But normal cruising with airflow temps usually stabilize between 190-197F.

Do you know for certain that the fans stay on at track speeds? Genuinely curious if upgrading the fans to higher CFM units will help at all with 230+ coolant temps I am seeing on track.