I'm running a dry turbo, aka oil only. T3/T04e. Oil temps get pretty hot, i want an oil cooler real bad. But i also like the Coolant temps staying lower. Its all relative i mean the cooling system is designed to cool the oil as well as it moves through the block. So a hotter cooling system (water lines on turbo) will cool the oil less effectively and thus it would still get hot. A cooler system (aka no water lines on turbo) will cool more effectively, but the oil will get a little bit hotter (especially with a big turbine). Either way, its the same thing. If you have a turbine without coolant lines, don't worry it was designed that way, just run the oil lines. If its like a stock turbo and has the coolant lines, run those. If you have yet to get one.... because of cost for fittings and stainless lines, just get a "dry section" turbo aka only oil.
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