390 fe overheating - Page 2 - Ford Muscle Forums : Ford Muscle Cars Tech Forum
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post #16 of 23 (permalink) Old 08-06-2014, 01:41 PM Thread Starter
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Re: 390 fe overheating

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Originally Posted by 70XL View Post
I think looping the heater hoses is to take the interior heater core out service. This is usually done to avoid replacing a leaking heater core when you don't need heat in the passenger compartment, but I don't see how that would help an overheating engine.

No exactly my idea too. Actually I se it as an advantage that I can pull some heat OUT of the engine in stead.

I took it for a spin this afternoon. Weather was cooling down a little when I got done putting it together. Drove for half an hour on country roads with temp. changing from 190-200F.

So now I'm looking foreward to see how it goes on a hot day.


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post #17 of 23 (permalink) Old 08-06-2014, 04:43 PM
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Re: 390 fe overheating

Great progress sir!
Yes, your idea is correct; it's an "old school" trick for an overheating ride to open the heater vents for plenty of air to flow around the heater core, enabling some amount of heat to dissipate from the flowing coolant...

Kevin -
1963 1/2 Galaxie 500 Fastback; 390, 4 speed "Z-code" - in the family since new
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post #18 of 23 (permalink) Old 08-06-2014, 06:20 PM
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Re: 390 fe overheating

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No exactly my idea too. Actually I se it as an advantage that I can pull some heat OUT of the engine in stead.

I took it for a spin this afternoon. Weather was cooling down a little when I got done putting it together. Drove for half an hour on country roads with temp. changing from 190-200F.

So now I'm looking foreward to see how it goes on a hot day.
what thermostat rating was that with?
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post #19 of 23 (permalink) Old 08-06-2014, 11:41 PM Thread Starter
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Re: 390 fe overheating

Thank you :-) I really hope it behaves on a sunny day too :-)

The thermostat opens at 180F. And the timing was set very low on this trip. So low there's a big loss of power.


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post #20 of 23 (permalink) Old 08-06-2014, 11:46 PM Thread Starter
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Re: 390 fe overheating

By the way guys, I'm very gratefull for all of your answers and ideas. But i have another question. How do you lower your classic?

I can't seem to buy lowering springs anywhere in Denmark or Sweden. You dont just cut or heat yours - do you?


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post #21 of 23 (permalink) Old 08-07-2014, 12:19 AM
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Re: 390 fe overheating

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Hi. I have put a very big alu radiator in it. As big as it gets without cutting in the car.
The engine isn't bored. It has very few miles on it. Only the heads are renovated, pressuere tested and everything. Well and the camshaft, valves, rods and so on.

It has been driven without the vacuum advance so far. Is that bad? I see a lot of US cars with the vacuum advance disconnected..... :-/
hello;

unfortunately, unless you have installed a radiator that is made in the united states of americe, it is NOT the biggest rad you can fit in the stock position.

unless it has 4 rows of 1/2" tubes on 5/16" centers like some rads made in the usa it is NOT the biggest rad you can fit in the stock position.

unless the rad has a tripple pass core, it is NOT as efficient and cooling as well as it can be.

unless it has a high flow thermostat AND high flow water pump, it is likely NOT as efficient and cooling as well as i could be.



VACUUM ADVANCE

Don't know until you give us the info i asked for in post 2.

also need total timing with the vac adv connected.

also, when in the driveway, does the engine rough at around 1600 rpm with the vacuum adv connected?
.

Last edited by barnett468; 08-07-2014 at 02:49 AM.
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post #22 of 23 (permalink) Old 08-07-2014, 02:55 AM
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Re: 390 fe overheating

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Originally Posted by Lateshovel View Post
The thermostat opens at 180F. And the timing was set very low on this trip. So low there's a big loss of power.
it is also likely overheating because your thermostat rating is too low. i would install a 192 premium from stant or similar.

the more advanced the timing is just up a few degrees before it is "too much" will help reduce temps.

if you run timing that is far less than the engine can tolerate it will cause it to runn hotter than it should.

basically, you can MELT [seriously damage] your engine if the timing is too low, no joke.
.
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post #23 of 23 (permalink) Old 08-07-2014, 03:00 AM
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Re: 390 fe overheating

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Originally Posted by Lateshovel View Post
By the way guys, I'm very gratefull for all of your answers and ideas. But i have another question. How do you lower your classic?

I can't seem to buy lowering springs anywhere in Denmark or Sweden. You dont just cut or heat yours - do you?
never, never, never, ever, ever, ever, cut or heat a stock spring. buy lowering springs. if they are stiff enough they can be cut.

for the rear leafs you can buy lowering blocks or "reverse eye" lowering springs.

if it has long shackles like some trucks, those can be lowered. it will lower your pinion and increase your pinion angle relative to the driveshaft slightly.
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