Wastegate (Boost) Control Solenoid Valve

[cmcintyre]

Finally found the thing in the manual as I'm getting through the harness. I see that in the Subie, it's remotely mounted (?) on the firewall by the shock tower. Where have you guys been installing it?

What advantages/disadvantages of an aftermarket valve on a stock EJ205?

TIA

Christian

[mikeb75]

I installed mine on the frame over where the air filter/intake is. I also seen them on the firewall/front frame rail of the engine compartment.

OEM is fine for stock turbo & engine, I think you only need to consider aftermarket when you get into more advanced tuning & builds where controlling the turbo output becomes more work. I think some tuners will switch out the OEM ones before starting their tune (depending on the build).

There should be some information on the GM 3 port solenoid on nasioc, this was considered a good go-to replacement for a while.

[STiPWRD]

I'm using the grimmspeed EBCS:
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=13&cad=rja&uact=8&ved=0CFYQFjAMahUKEwjhoej7iOrHAhUBQZIKHRG4AU0&url=http%3A%2F%2Fwww.maperformance.com%2Fhosted%2F boost_control_solenoid_Subaru_online_version.pdf&usg=AFQjCNEMlC8ioeZj4WtBAyiREIchF5OVKw&sig2=tKXYhe6dh_B6ocX9USLQuw

From the PDF: "The benefits of this upgrade are faster spool, ability to hold higher boost, and better control
over boost. A side benefit of the improved boost control is the ability to reach higher target
boost levels in the low (1st and 2nd) gears"

You will need to tune your wastegate duty cycle (WGDC) 30% lower, which can be done with an access port, tactrix or other ecu tuner.

[cmcintyre]

Great. I'll check with my tuning guy. Any pictures of tubing routing and connection points?

Thanks!

[STiPWRD]

Here are some photos of how I mounted mine on top of the frame rail near the coolant overflow tank:
4526145262
The instructions in the pdf are really straight forward about where the three hoses route, one to the compressor, one to the wastegate, and one to the turbo inlet. I used some barb fitting reducers where the hose sizes didn't match up exactly.

[cmcintyre]

Thanks guys. When I get back in town (just 6 time zones to go!) I'll see which aftermarket BCS Jack at EFI Logics wants to work with. We will be doing a little mapping and power improvement. Don't want to get too greedy, its a 90k motor. I'm sure I'll see where the "compressor" and "turbo inlet' attachment points are when I can stare at it for a while. The manual isn't too helpful with hose routing.

[Hindsight]

Here is a pic of mine:

http://i.imgur.com/dNEObGkh.jpg (http://imgur.com/dNEObGk)

[cmcintyre]

Thanks, Hindsight and STiPWRD. Not to belabor the point, but looking at the Cobb, I see left goes to the back of the wastegate. Can you click a quick one of each of the connection points for the other two? No big deal if not, its just another problem with not having disassembled my own donor. Thks again.

[JeromeS13]

Thanks, Hindsight and STiPWRD. Not to belabor the point, but looking at the Cobb, I see left goes to the back of the wastegate. Can you click a quick one of each of the connection points for the other two? No big deal if not, its just another problem with not having disassembled my own donor. Thks again.

Instructions on Cobb's website: https://cobb.app.box.com/715750instructions

[Hindsight]

It may be different depending on which brand you go with. If you are going Cobb, the directions are on their website. Stock is a 2-port so it's different.

[cmcintyre]

Instructions on Cobb's website: https://cobb.app.box.com/715750instructions

Got it! thks again.