Temp range possible issue

[Hemiwes]

So I've got a 493 stroker, with a mopar performance water pump housing and mezeire electric water pump and 27" aluminum radiator. Also got FI tech EFI. So my gage is hooked up to outlet temp, fan relay is hooked up to outlet and the FI tech screen hooked up to inlet temp. The differential temp is about 30 degrees. Inlet about 188 to 195 and out let from 210 to 225. Does this seem like a normal range? Seems really hot to me on the outlet. I get an over heat light that comes on with my gage but the inlet to the engine is only reading 203 at the most. Am I over thinking this or should I be worried? Thanks for any and all inputs.

 

[65-440]

sounds like the radiator isn't doing a very good job ..... should be much cooler than 195 going into the engine

 

[Hemiwes]

So it was reading 195 at idle while the outlet was around 215. Normal cruising speed (50) the outlet reads around 210-215 and inlet reads about 185

 

[69Bee]

Sounds fine to me. Mopars like to run hot.

 

[Bigal75]

I find that to hot personally.

 

[Hemiwes]

What would you do to lower the operating range? Bigger radiator? Bigger fan?

 

[mikeyfrano]

What would you do to lower the operating range? Bigger radiator? Bigger fan?

Try a new thermostat 1st

 

[66Satellite47]

Sounds fine to me. Mopars like to run hot.

Not in my drag racing experience. Or the dyno on my new motor. Hot cylinder heads, cool water jacket.

 

[65-440]

What would you do to lower the operating range? Bigger radiator? Bigger fan?

Exactly what radiator are you running now ? Thermostat is well open at that point, I'd rule that one out as the problem ....

 

[65-440]

20-30 degree difference between inlet and outlet on the radiator is pretty normal. That is how you can see if it's blocked or not. But you temps going back into the engine seem high to me.

 

[Hemiwes]

So the radiator is a 27" x 18" aluminum 3 row. The cap is keeping all pressure in. I have not seen any boil over. It's got a 16" electric fan that has a custom aluminum shroud around it as well. The motor has been pushed back about 18". That might be an issue as well. Too far away to have adequate air flow go over it. I know the radiator is doing its job correctly if I'm getting a 20-30 degree difference. Thermostat is definitely working

 

[miller]

If your getting good flow through the radiator, I'd think not enough air...meaning the fan isn't doing enough.

 

[Hemiwes]

Well when we m up to speed the temp and range remains the same during idling periods it only goes up slightly.

 

[miller]

The motor has been pushed back about 18". That might be an issue as well. Too far away to have adequate air flow go over it.

Just trying to picture that. Is the fan at the radiator, how far?
Your motor might simply be hot natured.

 

[Hemiwes]

Here is an idea of what I'm working with

 

[65-440]

I don't think your engine being further back will have any negative effect. Airflow over the engine from the fan is negligible, does not matter. However, the fan should be pulling sufficient air through the radiator which pulls the heat out of the coolant. I've heard plenty stories of those 3 and 4 row radiators running hot due to the air getting trapped in the middle and not allowing good airflow through the core. The least amount of rows with the biggest tubes will work the best. The object is to pull the heat out with airflow, lose the airflow and the heat will not leave !

 

[black64]

One other factor is coolant circulating to fast through the radiator to take enough heat out.

 

[Hemiwes]

So the thermostat might not be slowing down the 55gpm water pump enough? I've tried flow restrictors before but had no luck. Didn't make a difference. Took them back out. Only thing I can think of is either a better radiator, more aluminum siding to the left and right in the front of the radiator to direct all air flow through the radiator instead of possibly going around it, or lengthened outer shroud to direct the air more on the engine rather than all over the engine compartment.

 

[65-440]

you'll just be directing hot air over the engine, I don't have experience with electric water pumps. That may or may not be your issue .... OR ... radiator

 

[Hemiwes]

you'll just be directing hot air over the engine, I don't have experience with electric water pumps. That may or may not be your issue .... OR ... radiator

Gotcha. Maybe the radiator is just not up to the task or needs some more air directed through it.