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  #1 (permalink)  
Old 07-10-2006, 11:15 AM
2000jack's Avatar
1929 Chopped Tudor
 
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Over Heating Problem

I have a 29 Tudor that I had heating problems last year. So I changed the motor to a 350/340hp freshly rebuilt (Phoenix Engines). New water pump, new hoses, new fan belt, and etc. Had the four core Walker radiator check by a radiator specialist and he said it was fine. We changed the position of the radiator and added a flex fan, possibly not the best. Anyway I drove it for small trips 1/2 hour to an hour at a time. Fine. Mechanical moon gauge mounted into intake manifold read 162 with a new 160 degree thermostat installed. Now I decided I want to have a hood, fiberglass, one piece, NO SIDES, just enough to keep the rain off the motor. Now I drive it for hour and a half and the temp slowly crept up on the interior gauge which is not the best gauge. I don't give that a lot of attention, but it is noted. When we get into city traffic the engine mounted gauge climbs up to the 210 mark. Now I drove back two hours without traffic, and the hood was taken OFF and I get back to the house the engine mounted gauge reads 162, perfect. I thinking do I need a shroud, better fan or an auxiliary electric fan to push air from the front of the radiator? Do you have any suggestions? The fan is approximately 2 inches from the radiator and that is fixed.
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Old 07-10-2006, 11:19 AM
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You might pick up on this thread for some ideas

Cooling Fan/ Tight fit

or go to www.stewartcomponents.com and read through their tech stuff.

The only thing that I can say is that often times the airflow does NOT go the directions it looks like it should go. If your hood is causing a heating condition, then rethinking the airflow path is one solution. Maybe a tight shroud and fan will help at highway speeds, but ram air should be the main flow.

Derale and Flex-a-lite both make stainless steel flex fans that should move a lot of air. Avoid plastic. Pusher fans usually block airflow at highway speeds.

Last edited by xntrik; 07-10-2006 at 11:29 AM.
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Old 07-10-2006, 11:38 AM
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IMHO ...

You have to cool a thermostat ...
160 is NOT a good range for a SBC anyway ...
Proven fact that most SBC's make more power at 200 than 160.
With a 160 thermostat ... the thermostat is open most of the time ... because your engine is running at 160 or so. The coolant is not staying in the radiator ... long enough to cool down ... IMHO ...

Lets try a experiment ...
change the thermostat to a 180 or a 195 .. and see what happens ... I believe the temperature will NOT climb


A shroud is a good thing on most cars ...
I run one on my 32 Ford with a Walker radiator and a Walker shroud. I also use a 195 thermostat ... and my 430 Horsepower engine runs right on the thermostat ... even in the HOT, HUMID South ... ... with a FULL HOOD ...



I also run a ZIPS ... raised water pump ... for the SBC
See this thread for more information on the raised water pumps. The riser allows a lot larger mechanical fan ...

http://www.jalopyjournal.com/forum/s...d.php?t=119484
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Old 07-10-2006, 03:54 PM
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Quote:
Originally Posted by xntrik
You might pick up on this thread for some ideas

Cooling Fan/ Tight fit

or go to www.stewartcomponents.com and read through their tech stuff.

The only thing that I can say is that often times the airflow does NOT go the directions it looks like it should go. If your hood is causing a heating condition, then rethinking the airflow path is one solution. Maybe a tight shroud and fan will help at highway speeds, but ram air should be the main
flow.



Derale and Flex-a-lite both make stainless steel flex fans that should move a lot of air. Avoid plastic. Pusher fans usually block airflow at highway speeds.
Thanks for the help guys.I will order metal fan as I have a plastic guy now and Summit has an universal shroud kit that does not look to difficult to install. Also I will try a 190 a thermostat.
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Old 07-10-2006, 03:55 PM
2000jack's Avatar
1929 Chopped Tudor
 
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Quote:
Originally Posted by Deuce
IMHO ...

You have to cool a thermostat ...
160 is NOT a good range for a SBC anyway ...
Proven fact that most SBC's make more power at 200 than 160.
With a 160 thermostat ... the thermostat is open most of the time ... because your engine is running at 160 or so. The coolant is not staying in the radiator ... long enough to cool down ... IMHO ...

Lets try a experiment ...
change the thermostat to a 180 or a 195 .. and see what happens ... I believe the temperature will NOT climb


A shroud is a good thing on most cars ...
I run one on my 32 Ford with a Walker radiator and a Walker shroud. I also use a 195 thermostat ... and my 430 Horsepower engine runs right on the thermostat ... even in the HOT, HUMID South ... ... with a FULL HOOD ...



I also run a ZIPS ... raised water pump ... for the SBC
See this thread for more information on the raised water pumps. The riser allows a lot larger mechanical fan ...

http://www.jalopyjournal.com/forum/s...d.php?t=119484
Thanks for the help guys.I will order metal fan as I have a plastic guy now and Summit has an universal shroud kit that does not look to difficult to install. Also I will try a 190 thermostat.
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  #6 (permalink)  
Old 07-25-2006, 06:36 AM
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A Positive Result

I installed a 180 termostat, an all metal fan 17 inches instead of 16, a shroud, and a bottle of "Wetter Water". It ran it an hour and a half and it seems great! Thanks for your help.
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