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Old 01-31-2012, 12:44 AM   #1
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Default Swirl Pot

Just looking for some feedback from the cooling experts here. I am getting ready to put the coolant reroute on my fp miata, and was looking for some input on my current swirl pot.

I know it is kind of hard to see in the picture, but my mixing manifold is turned 180 degrees, the large line from the swirl pot connects to the mixing manifold. The small line coming of the swirl pot has a t-fitting that connects to the top of the current t stat housing, then continues to plug in to the back of the head.

I am of the opinion that I don't need to keep the small line that continues to the back of the head, that I can terminate it at the current thermostat housing.

The reroute install will have the current block off plate that is on the head moved to block the factory thermostat housing, I was thinking about tapping this plate for the small line from the swirl pot. Any input is appreciated. here are the pics.



I will be putting a protective wrap on the hose where it is currently zip tied to the car. I cant believe that the previous owner felt comfortable doing that.
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Old 01-31-2012, 07:31 PM   #2
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I am not a cooling expert, but I was doing some research on swirl pots and surge tanks a month or so ago. Basically you want to keep the smaller lines for the surge/header tank at the top of the cooling system. This post from Matt Andrews on cr.net shows his setup (http://clubroadster.net/vb_forum/showthread.php?t=10240).

Basically he took two lines to the surge tank. One from the top of the radiator (lower-right or picture) and one from the coolant reroute at the back of the head. His return in T'ed into the lower radiator hose (his mixing manifold appears to be in a similar orientation to yours).

I've seen other systems add a swirl pot (a chamber that actually swirls the water coming through the radiator hoses that allows gasses to escape) with a vent to the surge tank as well. That is what I was looking for when I came across the post by Matt.
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Old 01-31-2012, 08:22 PM   #3
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A header tank and swirl pot are two different things.
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Old 01-31-2012, 08:42 PM   #4
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Whats the difference between them?

Here's one of my attempts at keeping the temps down



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Old 01-31-2012, 09:11 PM   #5
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You can't see the swirl pot in Matt's old car unless you pull the intake plenum. His swirl tank only swirled water, with a bleed valve in the top to dump air. The header tank is visible in the pictures above. AWR sells both of these and they are very nice, I considered their swirl pot but don't "need" it.
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Old 02-01-2012, 12:52 PM   #6
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Okay, discovered that this is a header tank. Hustler you seem to be very well versed with
cooling. Does this set up look correct? The line that has me confused is the large line going down to the mixing manifold.
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