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im noticing that the 50trim is not watercooled, can someone explain?

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Gooberlog said:
You have to block off the coolant feed or swap in a 1g n/t water pipe"not sure if it'd bolt up to a 2g.

or you could just loop the coolant feed to the coolant return and be done with it that way as well. as for not being water cooled, eh its just not really needed.
 
what's to explain? the center section is a Garrett one - most of them aren't water cooled. They rely on oil only for keeping the bearings lubricated and cool enough not to burn up. All water cooling does is prolong the life of the bearings. on a side note it will bolt up to a 2G just fine. If you use a turbo that doesn't have a water cooled center section then you just take a piece of hose and make a loop.
 
One thing to remember (forgive me for pointing out the obvious), but proper turbo timing is crucial with a oil cooled only turbo, not that it's not important on water cooled turbos as well. You might want to consider turning up the timer a additional 30 seconds or so to give the turbo proper time to cool down and the hot oil to flush out. Of course when your driving hard additional time must be added.
 
^ ^ ^ Bingo. Oil-cooled only turbos are more apt candidates for a turbo timer. Another thing that is a good idea is an oil accumulator, not nearly as big an idea as it may seem like- just a tank that's sealed to atmosphere, orificed to the turbo bearing, and leaks down when the engine's shut off.

And still, there are millions of healthy oil-cooled turbos out there that have never been timed, just shut off after 15-30 seconds of idle and not run before shutoff.
 
I have a question going along with the water/oil cooling subject. I know a guy who used to run a Big 16g without the water lines hooked up. Do the mitsu turbos need water cooling or would oil alone keep them happy as long as they are properly timed before shutoff?
 
Maybe--but if it is set up to be water and oil cooled there is a reason for it. I would personally want more cooling capacity to the turbo which the water/oil cooled turbo provides even though my 50 trim is also only oil cooled.
 
Another thing that is a good idea is an oil accumulator, not nearly as big an idea as it may seem like- just a tank that's sealed to atmosphere, orificed to the turbo bearing, and leaks down when the engine's shut off.



Do you have any links to this?? Sounds like a good idea.
 
gooberlog:

i'm referring to the water pipe - the 2G thermostat has 2 outlets - 1 goes into the turbo, the other comes out from the turbo. if you just put a loop of hose on the 2 outlets on the thermostat housing / water pipe then it will work fine. i don't think a 1G water pipe would fit with the 2G thermostat housing.
 
zross1 said:
Another thing that is a good idea is an oil accumulator, not nearly as big an idea as it may seem like- just a tank that's sealed to atmosphere, orificed to the turbo bearing, and leaks down when the engine's shut off.



Do you have any links to this?? Sounds like a good idea.
Accu-Sump is the biggest name, and the easiest if you don't understand the idea well enough to do your own.

http://www.accusump.com/acc_products/acc_turboiler.htm

They aren't cheap, but they aren't hideous.
 
From what I have read on the water cooled turbos is this. It's mainly their to prolong life of a mistreated turbo. IE.. You run the car hard and then stop and shut down. The colant will help the oil and hopefully not Koke.. So during operation the water part of the turbo isn't really doing much except heating the water a tad more. I can't say it's safe to run a water/oil cooled turbo with out the water, but I don't see it being all that bad if you take care to ensure the turbo has cooled down before shutdown. Most people that are not auto enthuisest don't really know how or what their turbo is doing cept that it makes their car faster. So they don't also nesicarrily know how to care for them either. Just a thought. I personally would run the colant lines since we have them as it doesn't hurt anything. But when I get my Garret I'll switch to the N/T water pipe and say good bye to the few lines that can cause me a leak and probably grief someday.
 
Oil cooled is for people who take care of the turbos. IE turbotime/cool them down. It is 100% incorrect that most garretts are oil cooled, that couldnt be farther from the truth.

Watercooled turbos don't even need turbo timers really. They are meant to be beat on and destroyed (AKA OEM turbos). Turbo timer were invented with oil-cooled in mind.
 
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