67 Mustang cooling

[hybrid]

Yeah I have my temp gauge connected at the rear of the engine and it often disagrees with the Megasquirt (gauge reads hotter) after a long drive.

[boofhead]

Yep - water still has to travel from the rear up from the block through the heads to the front. A lot more temperature builds up from the combustion in the cylinder heads.

[cage]

Definitely invest in an accurate temp gauge that can tell you exactly where you are as opposed to the old C-H. They do become addictive though. Sounds like you have the right gear and I agree with the 180 thermostat. Start with that and see how you go.

In saying that though if you have the cash and want to make sure no matter what then by all means go the 24" and be done with it. I doubt you will be having this conversation again if you do.

[lifeis4living]

Fans are controlled via a variable thermostat with the probe placed through radiator fins. Probe is in a dielectric paste to make a thermal connection between fins and probe. Decent temp gauge will help set fan at desired temperature.

[Husky65]

Even a good temp gun would be worthwhile if you don't want to add an aftermarket gauge. Before this build, I set my on/off temps and noted my running temps with a temp gun.

[lifeis4living]

Yep husky I can get a loan of a temp gun. Worth having a play with and set fans after I put the 180 thermostat in.