Fox Why won’t my engine run cool

paddyrk · May 25, 2020

Sorry if this should be in the tech section, but I think here is better since I’m asking for opinions.
I have a 1991 347 swap, mild motor, 325whp so nothing crazy. I live in suburban Columbus so it is hot here now. Today I was out cruising, some light pulls, and my temp was still just about constantly 195-200.
I have this water pump, electronic, 55 GPM
I have this radiator and dual fan setup
I use VP cool down additive with distilled/drinking water
My timing is set correctly (verified at the Dyno and haven’t changed it), I just don’t see why I could STILL not run cool, I use a 180 degree thermostat, but I still run that hot, is it possible my hood doesn’t have enough exhaust flow (as in letting the air escape near the winshield)? I really don’t know how this happens.
please let me know your thoughts and ideas, this is very frustrating since I need to be able to daily drive this car. Thanks

TOOLOW91 · May 25, 2020

Those fans are Terrible . Ford contour fans would be a world of a difference.
195 -200 isn’t over heating either.

mikestang63 · May 25, 2020

put a Stewart or Edelbrock water pump and Contour fan on it. As Jeff said those fans dont pull enough CFM to keep a stock mustang cool. I agree 195 to 205 is not overheating. For your reference, if it is having issues at idle or in traffic it is usually an airflow issue. The Contour fan pulls over 3000 CFM. Couple that with a FAL31165 controller and a 3G alternator and you are set.

87 black gt · May 25, 2020

Just did this last summer like other say, contour fans and 3 core aluminum radiator I set my fans up to either one fan or two i run 306 and it will run 180- 190 all day and that's with one fan running, I have yet to turn the other fan on. Found my fans at local junk yard for 30 bucks

General karthief · May 25, 2020

On a side note, the air flow through the radiator into the engine compartment is designed to flow out under the car, there should be a plastic air dam on the cross member, this helps direct air up and down, this creates negative pressure behind it that lets the air in the engine compartment to escape out under the car.
The factory installs a 192* thermostat so 195-205* is not overheating. That's where they are designed to run.

KRUISR · May 26, 2020

I have a 3 core OEM style radiator, Contour fans set up for dual speed (both fans low or high), 180 thermostat and controller sensor in lower rad hose. I never get above 200/205 and don't get high speed coming on (low speed or no fans if I am moving). Works great.

HotFox · May 26, 2020

As Karthief mentioned that air dam is functional. On my 331 years ago I had temp climb issue on the freeway. It was related to the lack of air dam.

revhead347 · May 26, 2020

mikestang63 said:
put a Stewart or Edelbrock water pump and Contour fan on it. As Jeff said those fans dont pull enough CFM to keep a stock mustang cool. I agree 195 to 205 is not overheating. For your reference, if it is having issues at idle or in traffic it is usually an airflow issue. The Contour fan pulls over 3000 CFM. Couple that with a FAL31165 controller and a 3G alternator and you are set.

You actually want a Flowkooler water pump. The Stewart and Edelbrock are actually just factory style pumps. There is nothing special about them. I made a thread about this with pictures about 10 years ago.

Kurt

revhead347 · May 26, 2020

Would that be Columbus Ohio, Missouri, or Georgia?

Kurt

mikestang63 · May 26, 2020

revhead347 said:
You actually want a Flowkooler water pump. The Stewart and Edelbrock are actually just factory style pumps. There is nothing special about them. I made a thread about this with pictures about 10 years ago.

Kurt

flowkooler has reported some major quality control issues over the last few years.

General karthief · May 26, 2020

mikestang63 said:
flowkooler has reported some major quality control issues over the last few years.

So has Columbus

bigcatak · Jan 25, 2021

Have you checked the radiator with a heat gun to see if the gauge, or sensor is not to blame?

Noobz347 · Jan 25, 2021

paddyrk said:
Sorry if this should be in the tech section, but I think here is better since I’m asking for opinions.
I have a 1991 347 swap, mild motor, 325whp so nothing crazy. I live in suburban Columbus so it is hot here now. Today I was out cruising, some light pulls, and my temp was still just about constantly 195-200.
I have this water pump, electronic, 55 GPM
I have this radiator and dual fan setup
I use VP cool down additive with distilled/drinking water
My timing is set correctly (verified at the Dyno and haven’t changed it), I just don’t see why I could STILL not run cool, I use a 180 degree thermostat, but I still run that hot, is it possible my hood doesn’t have enough exhaust flow (as in letting the air escape near the winshield)? I really don’t know how this happens.
please let me know your thoughts and ideas, this is very frustrating since I need to be able to daily drive this car. Thanks

[When] does the engine seem to heat soak the most; while running or while sitting still?

The fans type is largely irrelevant when the car is moving at highway speeds. Sitting still is a different matter.

Fox Why won’t my engine run cool

paddyrk

Member

TOOLOW91

If you're the village idiot what's that make me?

mikestang63

87 black gt

Member

General karthief

wonder how much it would cost to ship you a pair

KRUISR

HotFox

revhead347

Apparently my ex-husband made that mistake.

revhead347

Apparently my ex-husband made that mistake.

mikestang63

General karthief

wonder how much it would cost to ship you a pair

bigcatak

Member

Noobz347

Stangnet Facilities Maint Tech... Er... Janitor

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Fox Why won’t my engine run cool

Member

If you're the village idiot what's that make me?

Member

wonder how much it would cost to ship you a pair

Apparently my ex-husband made that mistake.

Apparently my ex-husband made that mistake.

wonder how much it would cost to ship you a pair

Member

Stangnet Facilities Maint Tech... Er... Janitor

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