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Old 06-18-2004, 10:01 AM
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Keep overheating

Ok folks, here's the situation, i have:

355 SBC making 450hp.
16" electric fan
11:1 Compression with AFR 195cc heads (aluminum)
2x1" core aluminum radiator
160* thermo
Tranny cooler
41* overall timing (yes, that is right 41)
Stock waterpump (yes it works)

And in traffic the damn thing still overheats!! like 210* in stoplight traffic... but will cool down to 190* when going 55mph+

No shroud, no flex fan.

Any other suggestions?

I am going to try and put a new 180* thermo to see if that helps.

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Old 06-18-2004, 10:22 AM
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A shroud and an aggressive fan would GREATLY improve your cooling. The shroud being the more important of the two.
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Old 06-18-2004, 11:05 AM
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Aye, that was my idea as well.

Just trying to get second opinions
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Old 06-18-2004, 11:24 AM
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dude first off 210 is not anywhere near overheating. normal motors run at 220 (230 for dodge apparantely)
my hotrod runs at about 215 in traffic and 190 while cruising.
if you want it to run cooler 2 things.
1 bigger radiator (i use a old's diesel 4 core)
2 fan shroud ( dude you need a fan shroud)
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Old 06-18-2004, 12:15 PM
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I would switch to either 190 or 195F thermostat.

Mine runs at the same temps because my temp sensor is installed in the LH head. You will get higher readings from there. Where is yours installed?

And, of course, like someone suggested a good shroud setup.

Are you using a 50/50 mix?

Regards,
Denis
'67 Camaro RS
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Old 06-18-2004, 01:03 PM
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210 is fine not ideal but fine.......anything over 220 then you have to start worrying........................shroud is a big problem.........dont run a 50/50 mix run 70% water and 30% radiator fluid.......Add a bottle of water wetter and ill bet you will drop about 5-7 degress in traffic.......good luck

Last edited by 70SPORT; 06-18-2004 at 02:10 PM.
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Old 06-18-2004, 01:39 PM
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I agree and think 210 isn't that bad. I wouldn't worry until it started getting higher than 220 or so. A shroud will help tons as will a high flow water pump (stewart makes great ones). I usually put in a 180 thermostat, but I don't that that will have any effect on the heat situation.
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Old 06-18-2004, 03:21 PM
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Question, as I have a similar situation. My fan is attached directly to the radiator, how is a shroud utilized in this configuration, does it space the fan off the rad so the fan draw's or blows trough the whole surface??

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Old 06-18-2004, 03:38 PM
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i second everybody else's notion with a FAN SHROUD....that will help greatly.
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Old 06-18-2004, 03:59 PM
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Quote:
Originally posted by vegahigh
Question, as I have a similar situation. My fan is attached directly to the radiator, how is a shroud utilized in this configuration, does it space the fan off the rad so the fan draw's or blows trough the whole surface??

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That... and if your fan isn't flush with the radiator it will force air to flow through the radiator instead of re-circulating in the engine compartment.
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Old 06-18-2004, 04:49 PM
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210's nothin especially if the temp probe is in the head, if it is, install it in the intake coolant crossover. Temps don't vary so wildly in that location.
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Old 06-19-2004, 05:27 AM
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you want the probe in the head.......you want to know the highest temp of the motor Period.............placing it elsewhere is like living in denial..........................good luck
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Old 06-19-2004, 06:10 AM
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I run a flex fan no shroud, but have a 16" pusher elect. fan in front of my rad. In stop and go traffic when my temp climbs I turn my elect. on works fine
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Old 06-22-2004, 06:50 PM
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How do you guys feel about two electric fans? I currently am running only one electric fan on my 4 core aluminum radiator in my 66 mustang (mustang radiators are ridiculously small) and i'm wondering if i should put a pusher electric on it or should i move my puller electric to a pusher and install a mechanical fan? I'm over heating when i sit in stop and go traffic however the moment i start moving the temp drops dramatically.
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Old 06-23-2004, 07:15 AM
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Quote:
Originally posted by fried_guy
I usually put in a 180 thermostat, but I don't that that will have any effect on the heat situation.
Actually it will. Part of what a thermostat does is regulate the water flow. A higher temp thermostat will keep the coolant in the radiator a little longer which will allow the radiator to cool the fluid better. The 160* thermostat he's using will just open at 160 and stay open so there really is no regulating of the coolant flow.

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