na to td conversion turbo coolant line questions - page 5 - IDI Engine - VWDiesel.net The IDI, TDI, and mTDI source.
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#60 by bgbmxer on 24 Mar, 2011 02:36
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If you don't use an aux pump, then the coolant WILL boil in the turbo on shutdown. Better to not use the water cooling at all.
Just like the coolant does on the cylinder walls constantly as it passes by cooling them. Id rather have that boiling than the oil cocing up. I have never seen Any problems with coolant on turbos but plenty with oil and clogging up. This is the first time I have even heard of an aux pump.
Might have to look into one tho -
#61 by RabbitJockey on 24 Mar, 2011 04:37
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yeah its a factory part, i'll have to call mike he probably knows what its from
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#62 by bgbmxer on 24 Mar, 2011 04:48
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yeah its a factory part, i'll have to call mike he probably knows what its from
Alright Lmk
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#63 by R.O.R-2.0 on 24 Mar, 2011 11:16
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If you don't use an aux pump, then the coolant WILL boil in the turbo on shutdown. Better to not use the water cooling at all.
Just like the coolant does on the cylinder walls constantly as it passes by cooling them. Id rather have that boiling than the oil cocing up. I have never seen Any problems with coolant on turbos but plenty with oil and clogging up. This is the first time I have even heard of an aux pump.
Might have to look into one tho
the cylinder walls and head, are not 500* when you shut them down tho. they are roughly the same temp as the coolant around them..
just build it how you want.. you have asked us for our opinions on your build, and every time we say something important, you ignore it, so you MUST know what you are doing.. and you must have done it before.. so build it and report back, doesnt seem like you need our help AT ALL... -
#64 by bgbmxer on 24 Mar, 2011 11:46
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No I listen to people who have actually answered my questions which you really haven't you say it wont work. Tell me why It won't and how to do it. All you seem to do is contradict my ideas like I have no clue About anything. Everyone else is very helpful I haven't bickered with. You seem to base your facts off hear say while I put some facts up like the turbo thing. You say the turbo is huge but yet I'm told it's smaller than the stock Garrett. I asked two questions neither of which you answered. First you say not to watercool the turbo at all then say the way I'm doing it is wrong. It came from the factory that way. Cars still come with it that way. Can't be to horrible can it? I asked where to plumb into for both the oil and water. The oil question was answered long ago now the water question is answered and your still ranting.
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#65 by bgbmxer on 24 Mar, 2011 12:26
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I installed a water-cooled VNT on my Mercedes 300 TDT. I ran it first without an afterrun pump and it would gurgle for 5 minutes after shutdown on a hot day. The afterrun pump was not overly expensive or difficult to install. The Derale adjustable temp switch was also very good for dialing in a temp that would prevent the boiling without causing the pump to run excessively.
Do you have a link or a sorce for one or am I heading to the jy? -
#66 by R.O.R-2.0 on 24 Mar, 2011 13:18
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No I listen to people who have actually answered my questions which you really haven't you say it wont work. Tell me why It won't and how to do it. All you seem to do is contradict my ideas like I have no clue About anything. Everyone else is very helpful I haven't bickered with. You seem to base your facts off hear say while I put some facts up like the turbo thing. You say the turbo is huge but yet I'm told it's smaller than the stock Garrett. I asked two questions neither of which you answered. First you say not to watercool the turbo at all then say the way I'm doing it is wrong. It came from the factory that way. Cars still come with it that way. Can't be to horrible can it? I asked where to plumb into for both the oil and water. The oil question was answered long ago now the water question is answered and your still ranting.
i told you a LONG TIME AGO, that without a coolant pump, it will boil the coolant..
but whatever dude.. get to work.. you got a project ahead of you!
(just because the turbo is smaller, does not mean its going to work good, gasser turbos are different from diesel turbos.)
/endrant. -
#67 by RabbitJockey on 24 Mar, 2011 13:54
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the difference is in the sizing gas engines usually have a bigger exhaust side, this mitsu turbo does have a bigger a/r on the exhaust side than the intake side, but the exhaust side is still smaller than our garretts and k24 so he should have no issues spinning it. apparently tho the coolant boiling isn't an issue since many cars let it boil from the factory, i would think the gains of running the water through it with out the auxilary pump surpass any damage boiled coolant could cause or else they wouldn't manufacture cars that way and waste money on the extra manufacturing costs to use a water cooled turbo
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#68 by mystery3 on 24 Mar, 2011 14:05
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I had an auxiliary coolant pump on and old 5000csq, I'd buy new if I were you because they frequently leaked on older cars but it might be a good place to get the pigtail and any associated mounting hardware. The old audi pumps were run on a timer rather than a temp switch IIRC.
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#69 by bgbmxer on 24 Mar, 2011 14:35
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(just because the turbo is smaller, does not mean its going to work good, gasser turbos are different from diesel turbos.)
Where's the evidence? -
#70 by R.O.R-2.0 on 24 Mar, 2011 21:57
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i dont have maps from either turbo to prove my point.. nor do i care enough to actually look up the maps..
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#71 by AdAm84 on 27 Mar, 2011 12:03
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Man, I leave this forum for a while and people get stupid. Its like the entire VW community is afraid to try something different. Guys are just in the last couple years are starting to use H2O/Meth inj., bagging show cars, ect. The rest of the world has been doing this for years. Its like if it hasn't been done, it can't be done. There is another VW forum where people can act like a-holes and not help others, so if that is what you wanna do, go there. This used to be the only VW forum I used, but as my vehicles changed, it no longer is a big help for me. But, people used to be able to get on here and actually get help from people who actually knew stuff, not just critisize and talk out thier butts. Sorry for my ranting, but this is just stupid.
(just because the turbo is smaller, does not mean its going to work good, gasser turbos are different from diesel turbos.)
^^^^ this made me laugh big time.
Really? how do you figure? Thats like saying that a turbo will never work on a N/A car, or that the IHI VNT from my dad's D-max has a better chance of working on a 1.6idi that the K03 from my 1.8T just because the turbo is off of a diesel??? Our diesels are MUCH more like gasoline motors than almost any other diesel. Instead of just saying that will never work, look at a turbo map and give some factual information. If you need help reading one, I'd be happy to help 
. It's not a perfect match, but neither were the factory TD turbos for making 120+ HP. Givin the small displacement, limited revs, and stupid low price for these chrysler turbos, its a pretty atractive option for those who aren't afraid to try something new. Maybe it will fail, but at least everyone will know then. Once again sorry for my rant, I just hate when people give newbs to a particular scene a bunch of crap for trying to bring something new to the table. We're all here for the same purpose and thats to learn, so give everyone a chance.
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#72 by Vincent Waldon on 27 Mar, 2011 12:14
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Gents... now we have people being jerky about jerks calling other people jerks... let's cool it with the personal comments.
This thread asked a question: what do I need to do the hook up a water-cooled turbo? Let's stick to facts on that please and thanks. -
#73 by R.O.R-2.0 on 27 Mar, 2011 12:27
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Man, I leave this forum for a while and people get stupid. Its like the entire VW community is afraid to try something different. Guys are just in the last couple years are starting to use H2O/Meth inj., bagging show cars, ect. The rest of the world has been doing this for years. Its like if it hasn't been done, it can't be done. There is another VW forum where people can act like a-holes and not help others, so if that is what you wanna do, go there. This used to be the only VW forum I used, but as my vehicles changed, it no longer is a big help for me. But, people used to be able to get on here and actually get help from people who actually knew stuff, not just critisize and talk out thier butts. Sorry for my ranting, but this is just stupid.
(just because the turbo is smaller, does not mean its going to work good, gasser turbos are different from diesel turbos.)
^^^^ this made me laugh big time. Really? how do you figure? Thats like saying that a turbo will never work on a N/A car, or that the IHI VNT from my dad's D-max has a better chance of working on a 1.6idi that the K03 from my 1.8T just because the turbo is off of a diesel??? Our diesels are MUCH more like gasoline motors than almost any other diesel. Instead of just saying that will never work, look at a turbo map and give some factual information. If you need help reading one, I'd be happy to help . It's not a perfect match, but neither were the factory TD turbos for making 120+ HP. Givin the small displacement, limited revs, and stupid low price for these chrysler turbos, its a pretty atractive option for those who aren't afraid to try something new. Maybe it will fail, but at least everyone will know then. Once again sorry for my rant, I just hate when people give newbs to a particular scene a bunch of crap for trying to bring something new to the table. We're all here for the same purpose and thats to learn, so give everyone a chance.
ok, so the K03 on a 1.8t and the K03 off a TDI are the exact same thing then? they cant be different? just because they are both K03 turbos, and on different engines, they cant be different?
gasser turbos and diesel turbos ARE different..
the specs of them are different..aspect ratios, everything, even wheel diameter sometimes..
diesel turbos are built to spool at low RPMs, and are built to handle the inherently higher turbine speeds of the diesel..
gasser turbos spool at like 3500, diesel turbos spool at like 1800..
like i been saying, GET TO WORK! prove me wrong.. i wanna see it happen.. if your setup works good, i might just be running a different turbo, but i doubt it..
and yes, the coolant will boil inside the turbo once you shut the car off.. you need a coolant pump, or short runs of hose so that it can thermo-siphon the coolant thru the turbo..
and the only way thats going to work is if the coolant comes in from down low on the turbo, and exits up higher, and has a constant up hill path to wherever the coolant is going..
now, bickering aside, and all questions answered, i think its time to start your build thread..
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#74 by bgbmxer on 27 Mar, 2011 14:10
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like i been saying, GET TO WORK! prove me wrong.. i wanna see it happen.. if your setup works good, i might just be running a different turbo, but i doubt it..
As you can see from prior pictures I am already under way with fabrication just waiting for some exhaust tubing at the moment. Gotta make a custom downpipe.
now, bickering aside, and all questions answered, i think its time to start your build thread..
Thanks to everyone who didn't bicker and did actually answer my questions. And as for a build thread why bother you already know it won't work cause you know everything remember. I'll definitly take pictures of the setup. Im in the process of taking everything apart to put valve guides in, valve job, and port matching everything. Without making it flow more air it probably won't spool till late in the rpm band. It's and air pump. Don't over think it.