Cooling Nightmare!
Why have the fans shut down at 20% throttle? My truck will run hot unless the fans are on until I'm doing at 50mph and sometimes it comes on even then. I run the Holley so I have my fans set by temp and speed. Fans are off at 50mph unless the temp is higher than 200 and then the fans will kick on at 100% If it's a hot day or if the road has many hills the fan does kick on here and there.
Never heard of that before and I've been using electric fans for probably 35 years, Most were wired to turn on at startup and run 100% until shut down. (pre computer control) I don't see how it can run cool with little to no fans running at less than highway speeds, I know mine won't.
Never heard of that before and I've been using electric fans for probably 35 years, Most were wired to turn on at startup and run 100% until shut down. (pre computer control) I don't see how it can run cool with little to no fans running at less than highway speeds, I know mine won't.
On how the stock ecu controls fans :The key word here is stock, You're not running a stock engine and not running stock radiator.
All I know for sure is that thru testing myself my supercharged S10 temp continue to climb unless the fan is programmed to come on by temperature and not speed alone.
If it's cool day they hardly run at any speed but on a hot humid day they run at 80-90% most of the time unless I'm on the highway then they are usually off.
Good luck
I completely understand that I am not running a stock setup so stock settings will not work for everything. The fans do need to shut off once up to speed as they will restrict airflow after a certain point.
Def want to ditch those looped heater lines. You can just put something in the "loop" that blocks flow. If it cools at idle and not at cruise you aren't getting enough airflow over your core, or your core is just plain too small for your setup. You may be able to crutch it with a monster fan. But concentrating on getting clean cool airflow over the rad should help.
Looks like alot of area around the radiator that could be sealed off. Also an air deflector on the bottom of the radiator does quite a bit.
Again these are all just little tricks to help. Real issue is the radiator core IMO. Even with all the strikes against the imperfect mounting and poor fan quality... it would be probably be fine with the right core as is
As far as shutting the fan off, it depends on the fan. My car overheats on hot days on the highway with the fan off. The taurus fan on high is enough to cool it on the highway. It pulls more CFM than the radiator gets with the fan off. My setups less than ideal and has a 32x18x4 intercooler blocking a baby 14x14 radiator core 100%
best of luck!
Looks like alot of area around the radiator that could be sealed off. Also an air deflector on the bottom of the radiator does quite a bit.
Again these are all just little tricks to help. Real issue is the radiator core IMO. Even with all the strikes against the imperfect mounting and poor fan quality... it would be probably be fine with the right core as is
As far as shutting the fan off, it depends on the fan. My car overheats on hot days on the highway with the fan off. The taurus fan on high is enough to cool it on the highway. It pulls more CFM than the radiator gets with the fan off. My setups less than ideal and has a 32x18x4 intercooler blocking a baby 14x14 radiator core 100%
best of luck!
Last edited by Forcefed86; Jul 11, 2017 at 07:48 PM.
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I'd say it's a combination of radiator/fan not being enough. My LS1 s10 has a jegs dual pass, dual core with an intrepid dual speed dual fan and never goes on high and stays very cool.