Mahonroy
03-06-2007, 04:45 PM
Hey guys,
Haven't been posting much as I'v been real busy lately, but did have a question.
I have my engine and tranny completely re-built now and am ready to drop it back into the engine bay, and now lately I have been thinking about intercooling.
Originally I was planning on running a front mount with the new bumper, but now I am thinking I may just leave that idea and attempt a water to air, so was wanting to lay out my idea, and get some input from you guys.
Basically I was considering ordering something like this:
Ebay Link (http://cgi.ebay.com/ebaymotors/LIQUID-INTERCOOLER-ASSEMBLY-AIR-WATER_W0QQitemZ270096100105QQihZ017QQcategoryZ3374 2QQrdZ1QQcmdZViewItem)
This can be placed pretty much anywhere in the engine bay as its pretty small, probably in the vecinity of where the stock airbox use to be, or right to the right side of the head of the engine, so the charge piping can go right from the turbo to the water intercooler, then to the throttle body.
Next, I was going to make a little water resivor container that will bolt up near the drivers side strut tower.
For the actual cooling device, can I use something like this?:
Ebay Link (http://cgi.ebay.com/ebaymotors/Transmission-Oil-Cooler-20-000-GVW_W0QQitemZ200084215110QQihZ010QQcategoryZ46104Q QrdZ1QQcmdZViewItem)
Its a transmission oil cooler, but should be the same thing for a water cooler right? And this can just be bolted right infront of the radiator, or down in the fender well or something.
As for the actual water pump, I am unsure which one to use, I need to select one that flows enough, any ideas?
What I was planning on doing was wiring everything up so that when the car keys turn on, and the engine is started, the water pump turns on and constantly will pump water until the engine is turned off (though, there will be a resistor of some sort, so the pump will be in the low setting). I will also have a boost sensative switch so that as soon as there is possative boost pressure, the switch will then activate the pump to the high setting (basically bypassing the resistor). Still figuring out a good circuit so that after boost drops, the pump will still stay in high setting for like 30 seconds or so before going back down to the low setting. I can also put a temperature activated switch for if the water temperature gets too high it will go in the high setting until the temperature drops back down beneith the threashold. Could also rig something up to where the water cooler would go in the fender area, and there could be a temperature activated fan or something sitting behind it...
What do you guys think of this idea? Are there any draw backs to the water to air intercooler system? Because I was under the impression that a water to air intercooler system is far superior to a air to air intercooler system (e.g. they cool better, they take up no room compared to an air to air, can easily support a lot more power than an air to air, and the volume that the turbo needs to pressurize is less because of the small amount of charge pipes).
So yeah what I need to figure out is a pump to get, how much flow I need, and how big the water resivor needs to be, and how big the heat exchanger needs to be, though the one I shown above would work nicely I think.
I heard that the 150kW turbo Subaru Liberty (Legacy) RS for example uses a 4kW capacity heat exchanger, and that that heat exchanger also works quite effectively when power is increased to about 210kW. It also uses a rather small radiator, which is only 45 x 35 x 3cm. Also that there should be 2-3 litres of water in the heat exchanger at least to help absorb the temperature spikes.
Haven't been posting much as I'v been real busy lately, but did have a question.
I have my engine and tranny completely re-built now and am ready to drop it back into the engine bay, and now lately I have been thinking about intercooling.
Originally I was planning on running a front mount with the new bumper, but now I am thinking I may just leave that idea and attempt a water to air, so was wanting to lay out my idea, and get some input from you guys.
Basically I was considering ordering something like this:
Ebay Link (http://cgi.ebay.com/ebaymotors/LIQUID-INTERCOOLER-ASSEMBLY-AIR-WATER_W0QQitemZ270096100105QQihZ017QQcategoryZ3374 2QQrdZ1QQcmdZViewItem)
This can be placed pretty much anywhere in the engine bay as its pretty small, probably in the vecinity of where the stock airbox use to be, or right to the right side of the head of the engine, so the charge piping can go right from the turbo to the water intercooler, then to the throttle body.
Next, I was going to make a little water resivor container that will bolt up near the drivers side strut tower.
For the actual cooling device, can I use something like this?:
Ebay Link (http://cgi.ebay.com/ebaymotors/Transmission-Oil-Cooler-20-000-GVW_W0QQitemZ200084215110QQihZ010QQcategoryZ46104Q QrdZ1QQcmdZViewItem)
Its a transmission oil cooler, but should be the same thing for a water cooler right? And this can just be bolted right infront of the radiator, or down in the fender well or something.
As for the actual water pump, I am unsure which one to use, I need to select one that flows enough, any ideas?
What I was planning on doing was wiring everything up so that when the car keys turn on, and the engine is started, the water pump turns on and constantly will pump water until the engine is turned off (though, there will be a resistor of some sort, so the pump will be in the low setting). I will also have a boost sensative switch so that as soon as there is possative boost pressure, the switch will then activate the pump to the high setting (basically bypassing the resistor). Still figuring out a good circuit so that after boost drops, the pump will still stay in high setting for like 30 seconds or so before going back down to the low setting. I can also put a temperature activated switch for if the water temperature gets too high it will go in the high setting until the temperature drops back down beneith the threashold. Could also rig something up to where the water cooler would go in the fender area, and there could be a temperature activated fan or something sitting behind it...
What do you guys think of this idea? Are there any draw backs to the water to air intercooler system? Because I was under the impression that a water to air intercooler system is far superior to a air to air intercooler system (e.g. they cool better, they take up no room compared to an air to air, can easily support a lot more power than an air to air, and the volume that the turbo needs to pressurize is less because of the small amount of charge pipes).
So yeah what I need to figure out is a pump to get, how much flow I need, and how big the water resivor needs to be, and how big the heat exchanger needs to be, though the one I shown above would work nicely I think.
I heard that the 150kW turbo Subaru Liberty (Legacy) RS for example uses a 4kW capacity heat exchanger, and that that heat exchanger also works quite effectively when power is increased to about 210kW. It also uses a rather small radiator, which is only 45 x 35 x 3cm. Also that there should be 2-3 litres of water in the heat exchanger at least to help absorb the temperature spikes.