Running hot

[Falcon67]

>Today he put a 160 thermostat in it and it was a little better. But he has fans on all the time. I told him to put a 180 in and have fans come on at 195 and go off at 180.

Your advice is correct.  160 is too cold, might as well not even be in there.  If the fan/radiator package does not have bleed off ports then he's also going to have air stacking up in front of the radiator at cruising speeds.  I run a Meziere 35 GPH pump on the 351C with a 180 t-stat and big electric fans.  Works good.

Bleed off ports on a factory e-fan setup

[Thumperbird]

I don't believe in the "too slow" or "too fast" theories of water flow through an engine, unless they are really, REALLY slow.
x2

I suppose there could be some super rare and strange situations where the coolant carrying all the heat is at the center of the flow and therefore not benefiting from the temp. differential to the heat sink. 

[Keith Stevens]

I doubt this will be helpful but to elaborate on the situation.  I am running a stock ford 24" core in the Mustang. I decided to add air conditioning. I haven't charged the unit yet. This is factory AC. I didn't have an issue cooling, as a matter of fact the 180 EMP T-stat kept the temperature just above the first line on the temperature gauge. After the condenser was installed it changed the running temperature at least 10-15 degrees. The inboard headlamps were known for causing the engines to run at higher temperatures, especially in any stop and go traffic. I have a sneaky feeling the ACP Max Cool radiator I have here will end up on the car.

[Faron]

   A Good Read     https://www.stewartcomponents.com/index.php?route=information/information&information_id=11

[winr1]

That is indeed a good read



Ricky.

[Keith Stevens]

I love the EMP-Stewart Thermostat. However, here is a free warning. If you have any oil in your coolant it will cause the seals to swell in the EMP Thermostat. It will stick partially open or fully open.

[Falcon67]

>I don't believe in the "too slow" or "too fast" theories of water flow through an engine, unless they are really, REALLY slow.

A Griffin engineer told me to remember "Hot water = cool motor" - the working fluid needs to pick up the heat to carry it out.  Also, aluminum radiators work way better with 180 up water in them.  The higher the delta between the working fluid and ambient - to a point - the better the heat exchange works. 

Also, 180+ engine temps significantly reduce wear and help keep the oil clean.  I even stage my methanol fueled dragster at 180. 

[driveamerican]

Did he verify gauge is correct. Did he burp the the system maybe air pocket?

[Stangman]

So just an update i had him put in a 180 thermostat and  had him turn fans on at 195 and shut off at 180. Although he had them turning off at 185 he did the same ride and it didnt go over 204 and the temperature was 89 and extremely humid. So I think hes going in the right direction. im gonna make him have the fans go off at 180. On a non humid day I think he will be good.

[blykins]

As long as the radiator cap is sufficiently rated, 204° is not hot.

[Stangman]

So I just talked to him this morning and he told me when he put the thermostat in he drilled 4 small holes in it . I know some guys drill a hole but at some point 4 holes is a little excessive. Almost stopping the rat ate from working properly.

[jayb]

I drill four 1/8" holes in mine, when I'm using an electric pump with no provisions for a bypass.  Always regulates the temperature just fine that way.

[wowens]

I drill four 1/8" holes in mine, when I'm using an electric pump with no provisions for a bypass.  Always regulates the temperature just fine that way.

I do the same with factory pumps. I don't like the bypass hose look. Never had a issue.

[Stangman]

Wow ok good to know