runnin hot

[jrobertop88]

Hopefully those links work. They show my fan set up.

[Captainfab]

A couple things I see right off is 1) your radiator is not sealed to the opening in the radiator support. I can see where air can get past the radiator on the sides. And 2) with the fan mounted like that, it is only cooling part of the radiator. It is better to have a shroud that covers the entire radiator, and accomodates the fan being used. It also appears that quite a few of the fins on the radiator are bent over. If they are bent over, air can not get thru.

[Snailed]

The source of the heat is just as important as getting rid of it. The best/coolest results come from running lots of ignition timing and lean air fuel mixtures whenever the engine load is low. The less fuel you burn the less heat you have to get rid of. Engines are pretty crappy at turning gasoline into rotational force, lots of it goes out the tail pipes and radiator as heat.

What's your timing at idle? What's your air/fuel ratio?

[jrobertop88]

I would have to check that sir... Stand by for me to give you an answer.

[AcampoDave]

I gotta agree as well, those gaps on the side could be a big factor. When your rolling along the incoming air will shoot right around the radiator following the path of least least resistance. Another thing too, the openings in the hood are designed to funnel air into the factory radiator. Could your set up somehow be causing that particular air flow path to be obstructed by the position of the radiator which lacks the factory dimensions?

[AcampoDave]

You do have these whachamacallits installed on your truck too, right,? Because they also help block off a path of least resistance to the engine compartment.

[jrobertop88]

The wing things on the left hand side of the picture... Where the blue wires are at? If so no. When I bought it. It was an empty bay.

[AcampoDave]

Yeah those wing things with the 5 bolts. They help force incoming air thru the radiator instead of upward along the underside of the hood. I suggest getting control of all of those air flow problems and checking what the other members suggested too. Then see if it runs cooler at speed with the hood on. If that helps it, then check in traffic. If you have problems in traffic but not at speed then you need to consider your fan and/or radiator as a possible culprit.

[familyfast64]

Originally Posted by Snailed

The source of the heat is just as important as getting rid of it. The best/coolest results come from running lots of ignition timing and lean air fuel mixtures whenever the engine load is low. The less fuel you burn the less heat you have to get rid of. Engines are pretty crappy at turning gasoline into rotational force, lots of it goes out the tail pipes and radiator as heat.

What's your timing at idle? What's your air/fuel ratio?

I don't agree with this... I believe a leaner engine will burn hotter than a engine running rich... Am I wrong for that?

[B_Bob]

Originally Posted by familyfast64

I don't agree with this... I believe a leaner engine will burn hotter than a engine running rich... Am I wrong for that?

I'm with you on this. From my experience, a lean mix burns too hot, even to the point of making exhaust headers glow. A rich mix runs cooler than lean but will pass unburned fuel. what you want is the right mix so that your engine runs smooth, makes optimal power, and burns all the go juice.

[66Submarine]

Leaner or richer can be both hotter or colder. There is a point where the EGT peaks, leaner or richer of this will be cooler. Most stuff is jetted to be slightly rich of peak, so running a just little bit lean makes it run hotter(because you are around peak EGT), while running richer just makes it colder. Some people run piston engine airplanes lean of peak at cruise to save fuel.

[61_FL_Apache]

CaptFab has great points as always! I would go back a stock shroud and a mechanical fan as it was designed. It may not look as cool, but it works.. You can use a flex-fan instead of a stock fan with a clutch..

Also make sure your system is building pressure as it should and also check to see if the lower hose gets sucked flat when you are driving. I had that issue and found that the spring inside the hose rotted apart.

[brokenspoke]

Originally Posted by 61_FL_Apache

CaptFab has great points as always! I would go back a stock shroud and a mechanical fan as it was designed. It may not look as cool, but it works.. You can use a flex-fan instead of a stock fan with a clutch..

Also make sure your system is building pressure as it should and also check to see if the lower hose gets sucked flat when you are driving. I had that issue and found that the spring inside the hose rotted apart.

I do not recomend a flex fan any time

[Snailed]

Originally Posted by familyfast64

I don't agree with this... I believe a leaner engine will burn hotter than a engine running rich... Am I wrong for that?

I didn't word my comment right I guess. It is extremely common to find carburated engines setup with only mechanical advance and a too rich mixture. Sooo I'm suggesting running an engine the same way all OEMs do which is around 15:1 AFR at low loads and with relatively a lot of timing at low loads. It works very well, that's why they do it on millions of cars...that don't overheat.

[66Submarine]

Clarification FTW.

[jrobertop88]

Has any one had the same issuesq as me before???

[brokenspoke]

Originally Posted by jrobertop88

Has any one had the same issuesq as me before???

Why dont you try fixing some of the suggestions and see how it works out