this is my 2nd turbo build....the 1st "kit" had a t-25 and i just used the oil lines (left coolant lines off) never had a problem with it either.

Since this build(because i built my motor) i put a lil more money in the project, im wondering should i use the coolant lines??

will this cause any negative effect on my engine? and if i should use the coolant lines, could you tell me where to "tap" in to the coolant? (it a dohc zc in a ef hatch)

thanks oh and im not using the t-25 (still have a small turbo) i have a t3(.42/.48)

 

I say use the the coolent lines if u got em, the turbo was desined to have coolent in it if it has the lines. I dont know much bout FI but I would use them.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by teg racer 877 &raquo;</TD></TR><TR><TD CLASS="quote">I say use the the coolent lines if u got em, the turbo was desined to have coolent in it if it has the lines. I dont know much bout FI but I would use them.</TD></TR></TABLE>thanks for the input, anyone else?

 

I have a t3/t4 on a d15b7 and i am using oil lines. Works great for me. Honestly run the oil lines. Coolant does not lubricate as well as oil. And not haveing lubrication to the ball bearing isn't good. I would highly recommend using oil lines.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Wicked-Civic &raquo;</TD></TR><TR><TD CLASS="quote">I have a t3/t4 on a d15b7 and i am using oil lines. Works great for me. Honestly run the oil lines. Coolant does not lubricate as well as oil. And not haveing lubrication to the ball bearing isn't good. I would highly recommend using oil lines.</TD></TR></TABLE>i plan on usin oil lines, but i wondering if i should use coolant lines also??...and will it have any effect on the motor?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Wicked-Civic &raquo;</TD></TR><TR><TD CLASS="quote">I have a t3/t4 on a d15b7 and i am using oil lines. Works great for me. Honestly run the oil lines. Coolant does not lubricate as well as oil. And not haveing lubrication to the ball bearing isn't good. I would highly recommend using oil lines.</TD></TR></TABLE>

haha, i hope you didnt think he was using the coolant inplace of the oil.

i have heard from some people, that you dont have to use the water cooled passages if you dont want to. i dont know why you woudnt tho. it would help the longevity of the turbo. you wouldnt require a turbo timer.

one thing people do is tap directly into the drain bolt on the engine. right below and to the left of the engine code stamp. its a pretty large bolt. you just have to drill and tap the bolt. that way if you ever take the turbo off, you just have to get a new bolt

 

That is true. But also you have to think about the lubrication factor. Coolant doesn't lubricate. It just cools down parts. Oil cools down parts and also lubricates them at the same time. If you wanna pro-long the life of your turbo. Run oil lines. If you want performance then run coolant lines. It doens't hurt the turbo to run coolant lines. Just the fact the turbo wont get the lubrication it needs to perform at it's peek.

 

he would run both, some turbos have special water passages just for cooling. of course you still need to run oil. its a must.

 

Thats true. If it's set up for both. Then run both.

 

The turbo that came on my car used oil and water (oil for lube and water for cooling). Even though the turbo was especially small for its use, I never saw intake temps more than maybe 20*F above the outside air temp, usually more around 15*F. Now I have a much larger turbo, but it only uses oil lines (for both lube and cooling) and now my intake temps are about 30-50*F above outside air temps.

Also something else to think about is that the oil is only pushed into the turbo while the engine is running. And then the oil usually just "drips" out of the bottom. So once you turn the engine off, there is basically nothing to take the heat off the turbo, except the turbo itself (like a big heatsink). However with water lines they will always have water in them. So when you turn the engine off, even though the water stops flowing from the water pump the heat can actually create its own "flow" in the water.

So basically its just a choice of compromise. I could get my current turbo with an oil only CHRA or upgrade to oil/water CHRA for about $300 more. Or I could upgrade to a dual ball bearing GT series that all have oil/water for $700. I chose the cheapest route, no water. However if all else being equal, and you have the chance, I would get a turbo with water lines....and the if turbo has them I would definently use them. You can T into the throttle body or something for a coolant line.

I think I might install an oil cooler in-between the engine and turbo just to help cool mine off a bit.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B18B-SC &raquo;</TD></TR><TR><TD CLASS="quote">

haha, i hope you didnt think he was using the coolant inplace of the oil.

</TD></TR></TABLE>he did <TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B18B-SC &raquo;</TD></TR><TR><TD CLASS="quote">he would run both, some turbos have special water passages just for cooling. of course you still need to run oil. its a must. </TD></TR></TABLE>exactly <TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Wicked-Civic &raquo;</TD></TR><TR><TD CLASS="quote">Thats true. If it's set up for both. Then run both. </TD></TR></TABLE>i already said it has both <TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Westrock2000 &raquo;</TD></TR><TR><TD CLASS="quote">The turbo that came on my car used oil and water (oil for lube and water for cooling). Even though the turbo was especially small for its use, I never saw intake temps more than maybe 20*F above the outside air temp, usually more around 15*F. Now I have a much larger turbo, but it only uses oil lines (for both lube and cooling) and now my intake temps are about 30-50*F above outside air temps.

Also something else to think about is that the oil is only pushed into the turbo while the engine is running. And then the oil usually just "drips" out of the bottom. So once you turn the engine off, there is basically nothing to take the heat off the turbo, except the turbo itself (like a big heatsink). However with water lines they will always have water in them. So when you turn the engine off, even though the water stops flowing from the water pump the heat can actually create its own "flow" in the water.

So basically its just a choice of compromise. I could get my current turbo with an oil only CHRA or upgrade to oil/water CHRA for about $300 more. Or I could upgrade to a dual ball bearing GT series that all have oil/water for $700. I chose the cheapest route, no water. However if all else being equal, and you have the chance, I would get a turbo with water lines....and the if turbo has them I would definently use them. You can T into the throttle body or something for a coolant line.

I think I might install an oil cooler in-between the engine and turbo just to help cool mine off a bit. </TD></TR></TABLE>thanks man

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Wicked-Civic &raquo;</TD></TR><TR><TD CLASS="quote">That is true. But also you have to think about the lubrication factor. Coolant doesn't lubricate. It just cools down parts. Oil cools down parts and also lubricates them at the same time. If you wanna pro-long the life of your turbo. Run oil lines. If you want performance then run coolant lines. It doens't hurt the turbo to run coolant lines. Just the fact the turbo wont get the lubrication it needs to perform at it's peek.</TD></TR></TABLE>

I was just going to skim this thread and not write anything, but wow, I can't just let this one go..wtf are talking about?? As if there is an alternative to running oil lines? You HAVE to run oil lines! What do you mean the turbo won't get the lubrication to perform at it's peak? I can't even understand what you just wrote. It sounds like you don't know where the coolant and oil actually go in the turbo. As far as the choice of using coolant lines, how many factory gasoline powered modern turbo cars use turbos that do not have a water cooled center section? NONE.
Why is that?
What temperature does the bearing section of the turbo operate at?
What temperature does the oil start to become damaged?
What temperature does that bearing section get to when the flow of oil suddenly stops and the turbine wheel is still hot, like over 1000 degrees?
The result is that in a gasoline application with a non coolant cooled turbo not insanely far away form the exhaust ports, the heat imparted into the oil through the bearing section is enough to cause some constant damage to the oil, especially when the flow of oil suddenly stops. Synthetic oil fares slightly better than dinosaur oil in this regard.
Why do some turbos not have liquid cooled center sections? They were probably originally designed for diesel applications. Diesel motors have much lower egts.
All in all, running coolant lines ot the turbo's center section results in your oil lasting longer between changes, the turbo lasting longer, and you can shut the car off much quicker after getting the turbo hot. If you don't have a liquid cooled turbo, you should probably run synthetic oil.

 

Well said...........

 

I say run coolant lines. When I first got my turbo running my oil would always coke up on hot days (flat black hood still needs paint) even letting it idle like 5 mins. Oil temps read about 250F ave. Cut up an old air hose with leaky ends, tied into coolant line that runs from IACV to TB and now my ave. oil temps are like 210F. Works great for me
*of course I mean in addition to my AN3 oil line but that should go w/o saying duh*

 

if the chra has both oil and water ports, use them. it's put there for a reason.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Wicked-Civic &raquo;</TD></TR><TR><TD CLASS="quote">That is true. But also you have to think about the lubrication factor. Coolant doesn't lubricate. It just cools down parts. Oil cools down parts and also lubricates them at the same time. If you wanna pro-long the life of your turbo. Run oil lines. If you want performance then run coolant lines. It doens't hurt the turbo to run coolant lines. Just the fact the turbo wont get the lubrication it needs to perform at it's peek.</TD></TR></TABLE>

You don't sound like you're reading much of the thread details at all.