Which hose should be unplugged to keep the wastegate always open? The hose on port 3 (intake vacuum)? The hose on port 1 (boost source)? Or all 3 of the hoses?

Thanks in advance buddy!

 

Removing the hoses to the wastegate will have it running whatever pressure the spring can accommodate and no more. To have it always open on an external gate you'd have to remove the spring from inside, which might have other consequences. The nice thing about an internally gated turbo is you can disconnect the actuator arm from the flapper valve and it just stays in bypass.

 

The Evo X's stock TD05 turbo has an internal wastegate indeed. So I guess if the owner unplugs Port 1 (boost source), the wastegate actuator will remain at its default position?

 

To bring this thread back. I’m kinda curious now if I were to make the drive to the tuner with all mods on and if I accidentally tipped into boost even 1-3 psi let’s say. What would be the procedure? Obviously I would let off gas and get back out of boost but I guess I don’t understand what can happen if I did accidentally hit boost. Pull over shut off car and try again? Or is damage likely to occur if I hit even that minor amount of boost.

I’ve also read that with the AMS intake a tune is required to change things for the SST to function properly too but I’m assuming if I’m out of boost this still wouldn’t be an issue?

 

Don't worry the engine is not that fragile. You can tip into boost slightly on a base map and it won't cause any harm.

 

Cars with after-market intakes require an engine ECU calibration. The SST relies heavily on the MAF to calculate torque. By changing the intake, the MAF reads differently, and this can affect the SST).

 

Idk what happened to that last post but this is from Kozmic. Cars with after-market intakes require an engine ECU calibration. The SST relies heavily on the MAF to calculate torque. By changing the intake, the MAF reads differently, and this can affect the SST).

so do you think the SST will be fine as well? As long is I’m not hitting boost?

 

It's been 2 months and you're still asking? If you're that worries just have it towed or pay an e-tuner to get you a baseline before you hit the dyno.

It should be fine, even with the SST, as long as you stay out of boost/power but nobody with any liability stake is going to tell you to drive it without the tune. Driver error is still a possibility regardless.

 

it’s been 2 months because my friend that was going to install had a family emergency on our install day and I had to get back on the tuners schedule. Either way. Thanks for your input bud

 

You just need to drive it like a boomer, it's pretty easy to stay out of boost, even with the intake, the SST can handle it no prob. you aren't full throttle shifting. It's not going to self destruct. LIke I said, I drove 2 hours on a full intake and exhaust, 3-port on my SST without issue.

 

and you installed the 3 port fully? As in didn’t unplug any of the hoses and stuff like some people were talking about?

 

Correct, I had it plugged in and everything ready to go so the tuner could drive it on the dyno and send it. The hardest part of the drive was getting up to speed for the highway, but luckily traffic wasn't bad that morning.

 

I drove from Tampa to Orlando on I4, one of the worst highways out there, as far as traffic and terrible drivers.

 

I think what he meant by leave it unplugged is the electrical part of the controller not the hoses. You must absolutely connect the 3 port hoses, All 3 on an MR. Do not vent it. With the solenoid unplugged, it will only hit wastegate spring pressure which is about 12psi. So less than stock. You will be fine to drive it if you take it easy.

A 3 port solenoid (AEM, Grimmspeed, Cobb, any MAC35 based valve) is naturally in the open position. Meaning air will travel through it as if it was just any normal hose. It doesn't actually "increase" boost until you apply electrical pulses to quickly shut and open the valve. Therefore by hooking it up and LEAVING IT UNPLUGGED you'll hit a max of 12ish PSI, but you will have a check engine light for the solenoid not being present. No problem, drive it lightly, oncer you get there plug it in and hand them the keys.

Problem solved.