So i just finished up a rebuild for my TII, and i don't really see why mazda decided to run the coolant feed to the turbo straight from the actual block. Doesnt seem to make sense to send coolant through all the housings first, and then expect the temps to be low enough to cool down the turbo at all

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)

..and are there any other options?

 

That turbo is at such a higher temperature then the engine that it really doesn't matter where the coolant comes from. Just use the stock fittings.

These cars have been running for 20+ years with the stock setup.