Who's done a coolant reroute?
#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.
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.
#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.
hrk
I'll see if I can snap a photo of this if needed.
Good point olderguy.
hrk
#44
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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.
hrk
I'll see if I can snap a photo of this if needed.
Good point olderguy.
hrk
#45
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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.
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.
#48
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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.
Once the car is warm, there is no difference in heater function.
![wink](https://www.miataturbo.net/images/smilies/wink.gif)
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.
Stephanie
#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.
hrk
hrk
#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.
#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).
#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.
#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?
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?
#60
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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.