DC Contoller

[85_SS]

Jabin - feel free to jump in if you see this, or anyone else who may be able to offer input


I just installed the FK35 dc controller: http://www.dccontrol.com/fk35.htm

I put a jumper across pins 5&7 only. Can someone explain the chart on their site - it isn't very straight forward. I assumed this jumper position would turn the fans on 50% @202, 100% @212, and off @187 - this isn't the case as the fans didn't turn on until about 212 (which makes sense as they state this should raise temp by 22'). I have seen some people use two jumpers in reading through threads.

Can someone explain the chart and why there are multiple dots showing for each temp setting? Should two jumpers be used in all cases (one for each side)?

When you read the text, it makes it sound like a high and low setpoint which is what I am now thinking is what they mean - I just don't understand the extra two dots showing on each line.


Also, is a high pitch whine or siren like sound "normal" to be coming from the controller? This is quite loud, though I suppose it wouldn't be as bad with the hood shut. It is not coming from the fans, as they didn't do this when I test them directly off a battery, and the noise continues for a couple minutes after the fans stop, until it "winds down" and stops.

Thanks!

[85_SS]

Nevermind on the chart issue - I see you do need to put in two jumpers for most temp settings (the single jumper was giving me a 202 setting, although I was running higher). I was reading from the jumper setting on the left and looking across the chart horizontally - it just hit me that the chart is to be read the other way and set to one specific temp as per the jumper(s) specified. I will add another jumper @ pins 8&10 and see what it runs at - I may have to relocate the temp sensor (currently @ lower rad hose) as well.

If anyone has input on the whining sound that would be great.

[CarlC]

Mine whines through the radio, even with the filter.

Your final selection of the temperature will be lower than your target engine temperature if the sensor is mounted near the radiator return. Radiator output temperature does not always correlate to engine temperature. If you are targeting a 180* engine temperature, try the next lowest temperature setting on the DC Control (173*).

For me, I've found that having the sensor at 180* has worked well, but the engine temperature on warm days is 185-190* with a 180* thermostat at idle. I may try to embed the sensor in a pipe plug, mount it in the engine, and try setting the controller at 187*.

[85_SS]

Thanks Carl. Jabin emailed be back and I have everything worked out. I used a different ignition source off the fuse box and the noise is a fair bit quieter and only heard if I leave the ignition on/engine off to let the fans wind down. Not sure if it comes through the radio as I temporarily have mine out.

I have the setting @ 173 now and it runs at 190 on my mechanical gauge, which makes sense as you say due to engine temp being hotter than rad temp. This is the same temp I ran at before w/ the same 180 t-stat so I am happy and that is what I was expecting since the t-stat is probably keeping it at that minimum temp.

Very happy with the product and it was a pretty smooth installation.

[Madspeed]

Mine whines through the radio, even with the filter.

Your final selection of the temperature will be lower than your target engine temperature if the sensor is mounted near the radiator return. Radiator output temperature does not always correlate to engine temperature. If you are targeting a 180* engine temperature, try the next lowest temperature setting on the DC Control (173*).

For me, I've found that having the sensor at 180* has worked well, but the engine temperature on warm days is 185-190* with a 180* thermostat at idle. I may try to embed the sensor in a pipe plug, mount it in the engine, and try setting the controller at 187*.

Carl Your noise is from Dirty grounds and or dirty power connections
Ill bet you anny amount if you have your radio and all the cars gnds Clean and tight and most iportant All there, your whine will go away

Pm me if you like i can steer you through this problem