Need a temp switch

[aany001]

Hello everyone. I'm hoping someone can help me out with locating a temp sensor switch for my rad. It has to be a 2 pin setup to trigger my relay with a 1/8 npt or a 1/4 npt thread. I can't use my heads cause they are already used up and I'm running an LS so no intake locations either. Any leads would be appreciated.
Thanks
Steve

[randy]

So you already used the driver front and passanger rear location on the head?

[aany001]

Yes I have. The drivers side runs to the computer and pass side runs to my temp gauge. Rad rad has 2 spots that I can use but their 1/4 npt or 1/8 npt.
Tanks are too thin to drill and tap and Im not a fan of the probes.

[randy]

tap the water pump. Why not use another probe to install it in the radiator? That or use a adapter

What brand of gauge? Full sweep?

[aany001]

My gauges are new vintage USA. I managed to find a sensor from Derale part #16720. I hope this can help someone else.

[mikels]

Originally Posted by aany001

Yes I have. The drivers side runs to the computer and pass side runs to my temp gauge. Rad rad has 2 spots that I can use but their 1/4 npt or 1/8 npt.
Tanks are too thin to drill and tap and Im not a fan of the probes.

If one runs to ECM why not have it control output to relay?

Dave

[aany001]

Originally Posted by mikels

If one runs to ECM why not have it control output to relay?

Dave

Dave that's a great idea and I thought of that but I would like this fan to come on earlier than the PCM fan. So what I'm trying to do is have a fail safe to keep temps lower by having the fans come on at different temps as well as not having a large load coming on when both fans come on at the same time. I hope that makes sense.

[mikels]

Originally Posted by aany001

Dave that's a great idea and I thought of that but I would like this fan to come on earlier than the PCM fan. So what I'm trying to do is have a fail safe to keep temps lower by having the fans come on at different temps as well as not having a large load coming on when both fans come on at the same time. I hope that makes sense.

What ECM? Many have two fan output drivers.

Dave