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Old 07-09-2019, 07:55 AM   #106
overkill69
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Default Re: Basics of Radiator Cooling

Aluminum radiator core design...any thoughts on the size of the tubes in the core. I'm ready to order an upgrade radiator today and am leaning towards Be Cool due to good reviews and impressive tech support. They claim 2-1 inch tubes is the best. Griffin, Dewitts etc vouch for 2-1.25 tubes and a little thicker overall core. The multiple .5 inch tubes don't make sense to me and I suspect they are Chinese.
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Old 07-09-2019, 09:01 AM   #107
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Default Re: Basics of Radiator Cooling

If you have room for sufficient width and height, then I think two 1" tubes is best. If you're height and/or width limited, then you have only one other dimension to grow. Another thing to think about is single pass or multi-pass.
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Old 07-09-2019, 10:38 AM   #108
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Default Re: Basics of Radiator Cooling

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If you have room for sufficient width and height, then I think two 1" tubes is best. If you're height and/or width limited, then you have only one other dimension to grow. Another thing to think about is single pass or multi-pass.
I cut and hacked room for a 31x19. I had a 26x19 2 row x 1.25 tube before.
From what I've gathered multi-pass shines in mechanical water pump high rpm programs like dirt track and off road trucks.
I have an electric water pump pro street setup that gets hot at cruise mostly.
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Old 07-09-2019, 10:59 AM   #109
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Default Re: Basics of Radiator Cooling

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Originally Posted by overkill69 View Post
I cut and hacked room for a 31x19. I had a 26x19 2 row x 1.25 tube before.
From what I've gathered multi-pass shines in mechanical water pump high rpm programs like dirt track and off road trucks.
I have an electric water pump pro street setup that gets hot at cruise mostly.
What does your spark timing look like at cruise? Delayed spark advance at idle and part throttle can cause an overheating issue.
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Old 07-09-2019, 11:08 AM   #110
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Default Re: Basics of Radiator Cooling

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Originally Posted by Polyalphaolefin View Post
What does your spark timing look like at cruise? Delayed spark advance at idle and part throttle can cause an overheating issue.
I run the timing locked at 36 ish.
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Old 07-11-2019, 10:11 PM   #111
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Default Re: Basics of Radiator Cooling

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Originally Posted by overkill69 View Post
I cut and hacked room for a 31x19. I had a 26x19 2 row x 1.25 tube before.
From what I've gathered multi-pass shines in mechanical water pump high rpm programs like dirt track and off road trucks.
I have an electric water pump pro street setup that gets hot at cruise mostly.
What does the electrical side consist of --

12 or 16 volt battery?
what amperage does the alternator output at engine idle speeds?
is the elec fan pulling air through the rad?
what kind of fan are you running?
is it in a shroud?
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Old 07-16-2019, 10:53 AM   #112
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Default Re: Basics of Radiator Cooling

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What does the electrical side consist of --

12 or 16 volt battery?
what amperage does the alternator output at engine idle speeds?
is the elec fan pulling air through the rad?
what kind of fan are you running?
is it in a shroud?
12 volt but marginal alternator. I'm stepping that up and going to power the water pump directly of the alternator like the fan. Its a massive 16 inch puller with a shroud. With the new wider radiator I can do dual fans but im pretty sure this setup will cure it even with some of the core uncovered by the shroud.
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Old 07-16-2019, 06:29 PM   #113
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Default Re: Basics of Radiator Cooling

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12 volt but marginal alternator. I'm stepping that up and going to power the water pump directly of the alternator like the fan. Its a massive 16 inch puller with a shroud. With the new wider radiator I can do dual fans but im pretty sure this setup will cure it even with some of the core uncovered by the shroud.
If your alternator is marginal now, that is not ideal. If you have access to a "clamp-on" style current meter, I recommend you use it to measure exactly what the alternator is outputting at engine idle speed, with all electrical components on.



A safe range of output amperage, at engine idle speed, is 80 to 120 amps. This should cover a single fan application. If you go to dual fans, you'd want to go to the higher output range to ensure all electrical components are happy. An under-voltage condition is just as bad as an over-voltage condition.
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Old 07-16-2019, 06:51 PM   #114
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Default Re: Basics of Radiator Cooling

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The engine and radiator are both in OEM location. Engine is not high. 4 gallons in and level still goes to bottom of tank when turn electric pump on, with no thermostat or restrictor plate. Comes back up to top of tank when turn off pump. Radiator is wide albumin 2 row. Just curious.
Fill with electric water pump no t-stat
1) Fill the radiator to the top
2) Turn pump on
3) Fill rad to the top
4) Let pump run for 10 minutes (you do not need to start the engine unless you have a T-stat.
5) Fill rad to the top
6) Install rad-cap
7) turn water pump off (never take the rad-cap off unless the water pump is on)
You will not get a accurate water level in your system unless the water pump is running, electric or belt driven.

If you run a thermostat drill two 1/8" holes in the flange of the thermostat. This will help the air in the engine escape while filling when cold.
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