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Old 03-10-2007, 09:10 AM   #41
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Just a word of caution.

Most know that the only circulation the motor sees during warm-up is through the heater core in the stock condition, and after the motor warms up it is still the major flow for the rear cylinders. Hopefully no member will close off this water route without compensating in other ways.
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Old 03-10-2007, 10:08 AM   #42
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Quote:
Originally Posted by hrk View Post
Rubber plug from autozone clamped around the tube. I also turned the whole piece 180 degrees, so it points forwards, to make room for turbo hoses.

hrk
My tube is held on by the turbo manifold bolts (I think <G>) and is about 12 inches long. I do not believe there is any way to turn it around since it is just a straight tube. Does yours have a bend in it?
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Old 03-10-2007, 10:31 AM   #43
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Yes, that long tube was cut close to the water pump. The tube end going to waterpump was blocked with the plug. Then the whole aluminum part where lower radiator hose is clamped was turned 180 degrees pointing generally forwards. It might hit sway bar ot steering in stock Miata, but my slightly modified tube frame one it fits well.

I'll see if I can snap a photo of this if needed.

Good point olderguy.

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Old 03-10-2007, 10:51 AM   #44
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Quote:
Originally Posted by hrk View Post
Yes, that long tube was cut close to the water pump. The tube end going to waterpump was blocked with the plug. Then the whole aluminum part where lower radiator hose is clamped was turned 180 degrees pointing generally forwards. It might hit sway bar ot steering in stock Miata, but my slightly modified tube frame one it fits well.

I'll see if I can snap a photo of this if needed.

Good point olderguy.

hrk
Yes, a phote is definitely needed! If I were to cut the tube short, the only thing that keeps it in the mixing manifold is an oring which wouldn't hold and the tube would go shooting out as soon as the system was pressurized. I must be missing something.
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Old 03-10-2007, 10:54 AM   #45
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Quote:
Originally Posted by olderguy View Post
Just a word of caution.

Most know that the only circulation the motor sees during warm-up is through the heater core in the stock condition, and after the motor warms up it is still the major flow for the rear cylinders. Hopefully no member will close off this water route without compensating in other ways.
When I first did my reroute I had all the rear water going through the turbo. This was a big screw up because I didn't have hardly any flow through there. I don't think I damaged anything (at least I hope I didn't) by the time I figured this out and sent a bypass around the turbo straight to the radiator. I measured my water flow at the time and have the numbers around here somewhere. There are a ton of people waiting on the writeup for this on my webpage but I have been pretty lazy on updating it.
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Old 03-10-2007, 02:46 PM   #46
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Quote:
Originally Posted by rmcelwee View Post
Same as mine but with turbo cooling thrown in there too. What did you do where the coolant used to "enter the engine". I left the aluminum tube on there and just put a cap on the end but I hate that setup. I'm just looking for good ideas...

I pulled the tube with the o-ring out. I then tapped the hole that it came out of for a pipe plug (don't remember the size off the top of my head). I think that I used jb weld or something like that to make sure that the plug didn't come out.
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Old 03-10-2007, 06:16 PM   #47
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Quote:
Originally Posted by Starsky View Post
I pulled the tube with the o-ring out. I then tapped the hole that it came out of for a pipe plug (don't remember the size off the top of my head). I think that I used jb weld or something like that to make sure that the plug didn't come out.
Fantastic! That is what I needed. I am scared to do it to mine without a backup mixing manifold <G>. I sold an engine to a guy in our club so maybe I'll ask to borrow his manifold before I modify mine.
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Old 03-12-2007, 12:33 AM   #48
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Quote:
Originally Posted by Starsky View Post
Sorry Stephanie, but it does affect heater warm-up time. The coolant reroute that I did sends the coolant from the heater back to the rad like yours does. It now takes about 3 times as long for the heater to get hot after a cold start.

Once the car is warm, there is no difference in heater function.
As I have not routed mine yet, I will concede. Unless I can prove other wise one day.

But the whole point is to remove heat from the engine. My personal preference would be to have to wait on the heater warming up (yes, I am a wimp and hate cold weather) than to have overheating problems in the summer.
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Old 03-12-2007, 10:22 AM   #49
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Quote:
Originally Posted by Stephanie Turner View Post
But the whole point is to remove heat from the engine...
I don't think anybody is arguing that. It seems virtually impossible for the BEGI reroute NOT to do that since it's sending the engine heated water to the rad rather than back into the engine.
What I wonder is what difference it makes to coolant temp vs. other options.
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Old 03-12-2007, 02:55 PM   #50
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When I get my car back, I will take some temp measurements.
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Old 03-12-2007, 03:55 PM   #51
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One thing if you guide this hose from heater into radiator instead of engine is that on street use or light duty big part of the fluid flow will go throught this hose, bypassing the thermostat and prolonging heat-up time. On racecar it does not matter, but on street, the motor might not reach normal operating temps.

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Old 03-12-2007, 05:53 PM   #52
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Maybe it even shorten the engines live as it will not heat up asap...
But it is great when car is hot...
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Old 03-12-2007, 06:09 PM   #53
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I've got the BEGI re-route that comes with the turbo kit and a 37mm Koyo rad. If the heaters in the off position the coolant temp dial gets upto where it remains just as quick as normal, well it seems that way anyway, but it does sit about (the needle on the gauge) at about 75degrees from the horizontal now whereas before the kti it sat at 90 degrees. I've only done one 50 mile drive with the kit on and the wastegate was wound open as it was on the way to be delived to the people mapping my ECU so the car was effectively normally aspirated. I suspect when its running 220rwhp it'll get a bit warmer and a bit quicker.
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Old 03-12-2007, 06:21 PM   #54
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Even though I don't put many miles on my car, the fans used to continually kick on and off. Now, the temps stay just slightly lower (I can probably look at some old link ecu datalogs to get real numbers) and I rarely hear my fans/relay kicking on/off. Since I don't have a heater core in the car I cannot tell you how it affected that but I do know that it takes a while longer to warm up to temp now (but not a horrible amount of time).
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Old 03-12-2007, 06:27 PM   #55
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I don't want to say it's a bad system... but i have my doubts...
I can understand that heating up the whole coolant will take longer than the oem route.
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Old 03-12-2007, 06:40 PM   #56
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Perhaps a more proper solution would involve a second thermostat that would allow coolant to loop during warm-up, but would then close off the loop path and force coolant into the radiator at operating temp.
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Old 03-12-2007, 06:42 PM   #57
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Would the majority agree that without a heater core.. running it from the back of the head to the radiator and from the front corner of the block to the radiator is correct?

To add to that... where do I then tap for a water cooled turbo....
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Old 03-14-2007, 01:53 AM   #58
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Here's another level to the question.....

Out of the factory there's a water hose at the back of the block (right above the clutch) which is blocked off..... would it be possible to connect a hose to this fitting and effectively achieve a partial coolant reroute? Where would you connect it into? The return hose to the top of the radiator?
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Old 03-14-2007, 09:20 AM   #59
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Quote:
Originally Posted by Uncle Arthur View Post
Out of the factory there's a water hose at the back of the block (right above the clutch) which is blocked off..... would it be possible to connect a hose to this fitting and effectively achieve a partial coolant reroute?
That's partially how the traditional coolant re-route is accomplished. Moving the thermostat and outlet hose to the back of the head at the location you've described.
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Old 03-14-2007, 11:06 AM   #60
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Quote:
Originally Posted by Splitime View Post
Would the majority agree that without a heater core.. running it from the back of the head to the radiator and from the front corner of the block to the radiator is correct?
To add to that... where do I then tap for a water cooled turbo....
I would agree. Just stick a thermo on the back of the head and you'll have what IS the OE fwd routing.

Do you still have coolant that's routed through the TB and across the front of the engine? That would work. You could also drill/tap (or weld) a bung on the rear coolant cap that you'll use for the reroute at the back of the head OR source it from the new cap that you put on the front.
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