Which is better?
Top Picture: make a circle of coolant by having two tees in a coolant line and having the turbo as another route for the coolant to travel.

-or-

Bottom Picture: Make it so the coolant HAS to circulate through the turbo.



With the first way, I'd be worried about not getting enough circulation through the turbo, but with the second way, I'd be afraid my coolant pressure would be too high and be a restriction for the motor.

Regarding the second way...

coolant is not pressurized. The pressure is generated by the coolant heating and expanding within the system which allows a higher boiling temp. The water pump DOES NOT produce pressure whatsoever. It merely is there to circulate the coolant.

Having said that. If your turbo coolant line becomes blocked. Would you want flow blocked to whatever part of the engine is after it?

I would'nt think so.

Tee it off somewhere. It will build sufficient pressure to circulate through the turbo given no air enters the system.



Buildin' n' Boostin for 08' - Alex Richards

You want to run it like the first setup you have pictured. The majority of your turbos cooling comes from the oil flowing through it, the water is just an aid. Re-routing the coolant through the turbo is to restrictive since the passages on the turbo are so small.

try looking in the sema pics for the saab 2.0 turbo

im not sure if the coolant lines are present in the pics , also doing yours like the saabs is prob the best way to go , maybe see if saab will give you a line diagram for the replacement parts it usually shows were everything is connected , since your using the saab turbo


unless your not using snowmans kit any longer

I will be using Snowman's kit. I'm googling like crazy and can't seem to find any pictures.

the gallery here for the sema pics

sorry i shoulda said here , should be 02 or 03 i think

Alex Richards wrote:Regarding the second way...

coolant is not pressurized. The pressure is generated by the coolant heating and expanding within the system which allows a higher boiling temp. The water pump DOES NOT produce pressure whatsoever. It merely is there to circulate the coolant.

Having said that. If your turbo coolant line becomes blocked. Would you want flow blocked to whatever part of the engine is after it?

I would'nt think so.

Tee it off somewhere. It will build sufficient pressure to circulate through the turbo given no air enters the system.

I think what you have said here is a little confusing. Coolant is actually pressurized when the car is/has been running for the reason you stated. Gay-Lussac's Gas law states that temperature and pressure are directly proportional for a given constant volume. So, if the temperature of the coolant rises (from the car running) then the pressure rises and therefor creating a pressurized system. This is why you are never supposed to open the cap on your radiator and or coolant resevoir because the pressurized fluids and gases will come rushing out. However, if the car hasn't been running, the system is not pressurized. There's another law of fluids (forget the name) that states fluids will completely fill the container they are in, given there's enough fluid to fully fill the volume. And that law has nothing to do with pressure. So you can imagine, with pressure, it is even more likely the full volume will be filled.

Both of these reasons point to using figure 1. Like Alex said, the lines and fittings for the coolant to your turbo will be quite small and even the smallest amount of particles can block that port and if you run setup 2, instead of losing just your turbo, you will be losing your engine too.



Street-Legal 2003 Sunfire 10.58 @ 139 MPH

^Actually the second law you mention is for a gas, not a liquid and it isn't a law at all its a property of any substance in a gaseous state. -Sorry dont mean to be that guy but hey....

Joshua Dearman wrote:^Actually the second law you mention is for a gas, not a liquid and it isn't a law at all its a property of any substance in a gaseous state. -Sorry dont mean to be that guy but hey....

It may not be a law and is a property, but I said "fluid" and the literal definition according to Merriam Webster is: "having particles that easily move and change their relative position without a separation of the mass and that easily yield to pressure : capable of flowing" which includes both gas and liquids.



Street-Legal 2003 Sunfire 10.58 @ 139 MPH

Adam Hahn wrote:

Joshua Dearman wrote:^Actually the second law you mention is for a gas, not a liquid and it isn't a law at all its a property of any substance in a gaseous state. -Sorry dont mean to be that guy but hey....

It may not be a law and is a property, but I said "fluid" and the literal definition according to Merriam Webster is: "having particles that easily move and change their relative position without a separation of the mass and that easily yield to pressure : capable of flowing" which includes both gas and liquids.

Game set match for the illinois boys.....

:-)

Not to threadjack but adam I will be working on a full motor build and boost on my LN2 and maybe hitting up your shop soon. Your only 20 mins away.



Buildin' n' Boostin for 08' - Alex Richards

^heh....well, your gonna make me do this aren't you!

I absolutely agree...a fluid is everything that^ describes. The only problem is you mention "fluid and gas"(which is very common for people to refer to a liquid as a fluid) implying that by fluid you mean a liquid which by implication is wrong when you mention how "fluids" fill the container their in. A fluid is a general term including a gas and a liquid as your above post proves/describes, but when you start talking about properties of one of the substances inside the realm of the term "fluid" you should specify which substance your talking about. ie: "fluids will completely fill the container they are in" - this is wrong, gases will fill the container, liquids will change shape to match the container like a gas but only a gas will completely fill the container(also called gaseous dispersion).

Sorry man I didn't want to do it...........

Nice looking new mani by the way! - any chance it will be for the LD9 aswell?