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Old 09-15-2009, 10:48 AM
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remote radiator clearance?

i am thinking about mounting my heat exchanger for my intercooler system on my truck at the front of the bed. it is just like a radiator, but just a little smaller. i might even use a small racing radiator instead of the stock heat exchanger. it will have a shroud with 1 or 2 puller efans on it.

i was looking for some input on how much clearance from the front of the bed i needed for proper airflow. i was thinking something like 4-5"

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Old 09-16-2009, 11:49 AM
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I would check to see if a radiator can be used as a heat echanger. A radiator is meant for liquid to flow through it, not air. You may get into trouble trying to substitute.
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Old 09-16-2009, 01:30 PM
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It's an air-water system, so it would just be water/coolant flowing through it
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Old 09-16-2009, 02:34 PM
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I might be concerned with air just rolling over and over in the relatively calm area of the bed, blowing out the back of the radiator and rolling over to enter back at the front of it and getting hotter and hotter. Wind tunnel testing has shown that the volume in the bed is relatively undisturbed at speed.

I still get a kick out of the guys who come to Firebird with the tailgate removed because they think air against the back of it will slow them down. Not so. Air does not flow down into the bed at all, it just rolls over the cab, skims along the top of the bed and exits at the rear, above the tailgate.

If I were doing it, I might cut an air entry hole in the front of the bed to pull air from the sides and bottom between the front sheet metal of the bed and the back of the cab and seal the sides of the radiator to the hole. I'd put the radiator right up against the bed-front sheet metal with puller fans on the backside of the core.
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Old 09-16-2009, 02:58 PM
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Quote:
Originally Posted by techinspector1
I might be concerned with air just rolling over and over in the relatively calm area of the bed, blowing out the back of the radiator and rolling over to enter back at the front of it and getting hotter and hotter. Wind tunnel testing has shown that the volume in the bed is relatively undisturbed at speed.

I still get a kick out of the guys who come to Firebird with the tailgate removed because they think air against the back of it will slow them down. Not so. Air does not flow down into the bed at all, it just rolls over the cab, skims along the top of the bed and exits at the rear, above the tailgate.

If I were doing it, I might cut an air entry hole in the front of the bed to pull air from the sides and bottom between the front sheet metal of the bed and the back of the cab and seal the sides of the radiator to the hole. I'd put the radiator right up against the bed-front sheet metal with puller fans on the backside of the core.

yeah, about the tailgate, it doesn't really affect drag that much, but on my truck it is worth almost a tenth due to the weight.

i thought about cutting out a hole in the front of the bed, and mounting the radiator to it, but the clearance from the cab rear wall to the bed front is only 2-3" max. i would need to put the radiator at an angle leaning forward, and cut a hole in the floor to pull enough air from underneath.

i don't really want to cut the bed up that much, as this is just an experiment. if it doesn't work out i can mount my old heat exchanger up front again.
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