Turbo coolant feed source

[RETed]

Originally Posted by Justen

So my question is, can you bypass the heater core and run a turbo coolant feed from the bottom of the radiator? (where the coolant temps are probably the lowest they will be)

I think that's a very low pressure area of the cooling system, so it'll be a very inefficient system (for the turbo coolant flow).

I think Mazda desgined their system so that the turbo coolant feed line was as short as possible?

It doesn't matter if the coolant is a little over 200F versus maybe maybe 50F degrees cooler...
The turbo (CHRA) gets a LOT hotter than that.
The reason to run coolant through the turbo is to keep the oil from coking in the center.
We're talking preventing the oil from hitting 300F+.


-Ted

[Boostmaniac]

Originally Posted by RETed

I think that's a very low pressure area of the cooling system, so it'll be a very inefficient system (for the turbo coolant flow).

I think Mazda desgined their system so that the turbo coolant feed line was as short as possible?

It doesn't matter if the coolant is a little over 200F versus maybe maybe 50F degrees cooler...
The turbo (CHRA) gets a LOT hotter than that.
The reason to run coolant through the turbo is to keep the oil from coking in the center.
We're talking preventing the oil from hitting 300F+.


-Ted

Nicely put Ted, but don't non water cooled turbo CHRA's see way above 300 degrees?

Are they designed differently to reduce coking?

[RETed]

Dry centers - CHRA's with no coolant flow - rely 100% on oil to keep it cool.
Yeah, oil is used to keep the turbo centers cool.

This is why the coolant ones are superior to prevent coking and keeping the turbo cooler.


-Ted