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Well heck, that's as bad, if not worse than the Derale. Good to know, and Thanks for posting that! I was curious if all the controllers did it, and it seems like they do. I've gotten used to it at this point, and find myself listening for the sound to tell me if the fans are running or not when sitting at a stop light (have to turn the radio off to hear it tho).
My controller has the loudest squeal when the fans are at their lowest RPM, then it gets quiet when the fans are at high speed. Works great, but I bet it makes people look at my Disco funny in the grocery store parking lot, lol
I'm really looking forward to seeing your temp graphs after this mod. I didn't get to do any data logging before I did mine, and I love that kinda info. What app or tool are you using to collect data thru your OBDII?
I have a Foxwell 590 for my main diagnostics and Torque Pro to do logging with. I need to make some brackets to hold the shroud in and tune the controller. The instructions said it was pre-tuned for 180F thermostat but I found that to be very wrong, luckily I had the hose on standby and the AC fan kicked on which pulled the temp down nicely.
Some before coolant temp vs speed graphs. Went for a drive yesterday evening and this morning, Same route [23.3mi, 248-436ft elevation, average speed 33mph, max speed 60mph, 44mins], Outside temp about 85-88F. Coolant temps look normal, rising when slower/stopped and dropping back down when I speed up. Looking to see how much difference there will be with the electric fans.
Not sure what's going on with this? I checked the DCC controller output on pin 13 and it was not set to set to 2.63v for a 180F fan so I made the appropriate adjustments. While parked/idling I kept an eye on Torque Pro and the fans seemed to ramp up and off keeping Coolant temp at 197-198F. Did some fiddling with adjusting the controller set temp and determined nothing was helping bring it lower so I set it back to 2.60v(178F? thermostat) Outside temps today were around 88-90F, same trip as measured before.
I was expecting lower temps and more stable than this.. I'm going to reach out to DCC and provide these graphs after I can do another run from Cold start tomorrow.
Last edited by Sandman614; Jul 1, 2022 at 04:15 PM.
That's been my issue as well, getting the controller to come on/off at the right temps. I tried my temp sensor in a few different places until I found the best one that gave it the signal the controller seemed to work with the best. I found that ambient air temps were affecting my temp sensor as well, which is one of a few reasons why I moved it to on top of the outlet hose, so the radiator was blocking it from the wind a bit.
I thought I had read that the DCC controller came with a block style sensor, that was supposed to bolt to a cylinder head or someplace similar. I was surprised to see yours just had a temp probe that goes in between the radiator fins. The Derale is a stick on piece, that is supposed to be applied to the side of the radiator, but the D2 rad is not flat anywhere, so it was tricky to mount. I was hoping to hear that your style would read the temps better, but it looks like it will need some fine tuning as well. Like I've said before, the fans work great, but the controller issue seems to still be a work in progress, lol. My Derale is working fine now, but it did take a lil tinkering.
That's been my issue as well, getting the controller to come on/off at the right temps. I tried my temp sensor in a few different places until I found the best one that gave it the signal the controller seemed to work with the best. I found that ambient air temps were affecting my temp sensor as well, which is one of a few reasons why I moved it to on top of the outlet hose, so the radiator was blocking it from the wind a bit.
I thought I had read that the DCC controller came with a block style sensor, that was supposed to bolt to a cylinder head or someplace similar. I was surprised to see yours just had a temp probe that goes in between the radiator fins. The Derale is a stick on piece, that is supposed to be applied to the side of the radiator, but the D2 rad is not flat anywhere, so it was tricky to mount. I was hoping to hear that your style would read the temps better, but it looks like it will need some fine tuning as well. Like I've said before, the fans work great, but the controller issue seems to still be a work in progress, lol. My Derale is working fine now, but it did take a lil tinkering.
What temps are you seeing and what temp thermostat are you running? I have a "PEL500110 soft spring 180F" from LRNJ Auto Parts(lucky8?) off Amazon which have mixed reviews if they actually open at 180F.
I'll run this setup for a little bit to gather some data before I swap out the factory style thermostat for Extinct Inline thermostat.
What temps are you seeing and what temp thermostat are you running? I have a "PEL500110 soft spring 180F" from LRNJ Auto Parts(lucky8?) off Amazon which have mixed reviews if they actually open at 180F.
I'll run this setup for a little bit to gather some data before I swap out the factory style thermostat for Extinct Inline thermostat.
I'm running the Extinct inline setup with a 180 degree thermostat. I have my fans set to start coming on at 185, and full on at 195. After coming on, they don't shut off till 175, and run from 0-100% during that range. The Derale controller is easy to adjust with a lil screw that you loosen or tighten, seems to have about a 40 degree range of adjustment, give or take. Hardest part was getting the temp sensor in a good enough spot to read quickly, otherwise the controller was sluggish to react. I still haven't been able to test it when outside temps are over 90, but at 88, the highest temps I see are 190-195 on the highway with A/C running, at Colorado altitude
Seems like your temp sensor is reading quickly enough, you just gotta adjust the on/off temp range better?
Wish I could use the secondary air temp sensor at the bottom of the radiator, that'd be the best source for accurate temps. But, it's not a full range sensor, just on/off, from what I could figure out when I tested it anyway.
You guys might want to try placing the sensor on the back side of the water pump inlet, between the water pump and the front cover. The engine mass should help reduce temperature swings. That is where I placed mine on my truck with dual electric fans.
Sent DCC an email a few mins ago and got a quick response back. Indeed it sounds like my 180F soft spring thermostat is more likely 195F as some on the forum have found with theirs. I'm waiting on a gasket for my Extinct Inline thermostat mod and then I imagine I'll be running on "ice cube juice" as VGG says!
Notice he doesn't seem to know LR stuff, which is cool I just thought it was funny.
Originally Posted by "DCC"
You don't have a 180 degree thermostat. Under a light load at 50mph, even at 90F, the thermostat will be essentially closed. With 50 mph wind through the radiator, you have far more cooling than you need and far more airflow than the fans themselves can provide. The cycling that you see is caused from the thermostat opening and closing.
I don't know who makes a "soft spring" thermostat, but it's clearly not functioning as a 180 degree thermostat, it's more likely a 195 degree thermostat although it's functioning at approximately 197F. Buy either an OEM or a Stant thermostat and make sure that there is no air in the system.
I'm running the Extinct inline setup with a 180 degree thermostat. I have my fans set to start coming on at 185, and full on at 195. After coming on, they don't shut off till 175, and run from 0-100% during that range. The Derale controller is easy to adjust with a lil screw that you loosen or tighten, seems to have about a 40 degree range of adjustment, give or take. Hardest part was getting the temp sensor in a good enough spot to read quickly, otherwise the controller was sluggish to react. I still haven't been able to test it when outside temps are over 90, but at 88, the highest temps I see are 190-195 on the highway with A/C running, at Colorado altitude
Seems like your temp sensor is reading quickly enough, you just gotta adjust the on/off temp range better?
Wish I could use the secondary air temp sensor at the bottom of the radiator, that'd be the best source for accurate temps. But, it's not a full range sensor, just on/off, from what I could figure out when I tested it anyway.
Any updates on your fan setup? I just ordered the fusion fan setup for my LS swap discovery 2. I just couldn't find a decent way to fit the intake, shroud, and radiator hose in there without ditching the mechanical fan. I'd love to keep the stupid simple mechanical fan, but it sits right in front of the throttle body.
Not sure how I'll trigger it yet. My thoughts are using the GM PCM with a tie into the rover BCM for the AC signal.
It looks like this cooling system needs more fan than I expected, and I didn't fully understand what the AC option on the DCC controller did. I connected it to enable the radiator fans to come on at a higher speed when the factory AC/Aux fan is engaged. The results were as Richard was getting at in another thread, needing a more aggressive fan profile. Graph is the same local route as previous graphs.
Here's the results of a 14mi interstate run and then the cool down back to home, the OBD system in these vehicles is something else.. Most of the interstate section was fairly constant 68-72 (my cruise doesn't work) except for a bit of traffic through a construction zone. Ambient temps read 90-95F
I'm not sure how accurate this temp gun actually is, and how much insulating the tape(the metal was giving all kinds of reflective readings) is doing, but it's showing a 20F drop across the radiator.
