Hello! I'm in the process of gathering parts for a turbo build on my ES, and just have a couple questions regarding the wastegate, turbo cooling, ecu, and throttle body.

Turbo Wastegate

For the build I picked up a used Ralliart turbo out of a 2011. As I understand it, the stock wastegate spring pressure sits at 16 or 18 psi. I'm definitely not putting that through my stock block, so my two options are reducing the wastegate actuator rod length, or get a wastegate with a 7 psi spring in it. Turbo smart has one for about $100. Just wondering which option you guys would recommend.

Turbo Cooling

Does the ralliart turbo use coolant cooling? I see 4 ports on my turbo. Do I need to use coolant or can I just plug the holes and run only oil?

ECU

My plan right now is to just run the stock ES ECU. I can get an evo one for a decent price, just wondering what the benefits are over running the stock ECU. I know launch control is possible with the evo ECU, but I do have a N2MB WOT box I have yet to install that can do the same thing.

Throttle Body

I have a ralliart intake manifold. Should I also just grab a ralliart/evo throttle body or will the stock ES one do just fine? I doubt there would be that much of a difference, again, more just a question on if its worth it for that.


Thank you.

 

Wastegate:
Stock is 11psi. I have a 7lb spring in mine from TRITDT. The turbosmart one seems like it will work just as well. My timing is getting retarded by the knock sensor on 7lbs so I wouldn't recommend higher until you know that's under control.

Cooling:
Yes. I guess you could technically run it without coolant, but its easy to do so do it. If you do run it with only oil you absolutely need a good oil cooler and at that point its easier to hook up the coolant lines.

ECU:
It's possible to run the stock ecu. The biggest problem is how load scaling works with the MAP sensor. Sock has a 1.1 bar sensor and you need a 3 bar sensor for boost. That means the stock ecu will not know the actual manifold pressure and to my knowledge there is no voltage to pressure map you can tune like there is for the MAP sensor. You will need to custom tune everything that has to do with load on a dyno. After that you'll probably have DTCs related to MAP/MAF load mismatch. Using an evo ecu is cheaper and easier.

Throttle body:
Stock is fine

 

hey guys! hey Moss507! how's the build so far? I'm actually in the middle of tuning my stock 08 4b11 ROM to accomodate boost. this is an alternative to using evo x ecu. i'm stuck at tuning the MAP based load calculation maps. i'm scaling for an omni 4 bar map sensor. so far, i found out you can use 08 evo x gsr rom on an 08 stock lancer rom. only downside is the exhaust mivec DTC.

 

Its been a bit of a ridiculous process. A few places have sent the wrong parts to me multiple times. Its finally at a shop getting tuned but its been a headache and a half haha.

 

update us when it's done.

 

Will do. Hopefully its done before the November storage date so I can drive it a couple times before putting it away for the winter.