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Weird Boost Setup

Ruxis

By Ruxis,
in Engines & Forced Induction

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Ruxis Veteran

Ruxis

Posted
Posted

Hey guys,

So I bought my gtt about 6 months ago and recently bought a boost controller for it.

Me and the guy I bought it off hook up the hoses and while doin that found the turbo, actuator and BOV return Were all T'd together, the guy helping me said this would cut out my two stage boost, meaning I have 7psi all the time I stead of 4 then 7.. So we blocked the BOV return And put the turbo and actuator hose through the hks evc solenoid. So I drove home like that with no electronics and was goin to hook that up at home(it felt sluggish on the way home, suspecting because now it has the 2 stage boost). Hooked it up went for a spin and it was completely different, it took off!!. I read off the monitor 145 kpa!!!! So I unplugged the ebc and ran it how I did all the way home, still overboosting! Not sure what has changed since plugging in the electronics but it hasn't liked it.

I then put the hoses to how it was before we touched it, felt the same as before we did anything. Then connected the turbo outlet to the actuator and it felt the same when I drove it home, little sluggish. Since then I've opened the solenoid up to see if the plunger was stuck. It wasn't, moved nice and freely.

So that is my experience so far.

Question 1: why were those three hoses T'd together?? Is it to get a steady 7psi boost??

Question 2: could my actuator be on the way out and that's why I'm not using a solenoid in the first place??

Question 3: seeing as it works without the solenoid would you guy think that's the problem I'm having??

Any advice or answers will be greatly appreciated,

Jarrad.

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KiwiRS4T Grand Master

KiwiRS4T

Posted
Posted

Are you saying the original T did not have any hoses running to the factory solenoid? Then yes this is a way to set the boost without refrence to your ecu. It is perfectly ok - what boost were you reading?

No idea how your HKS ebc is connected but if it is electronic I shouldn't think it would work very well with no power applied to it.

There is no reason to suppose your actuator is faulty. I am not clear what problem you are having except that you haven't connected your ebc correctly.

Ruxis Veteran

Ruxis

Posted
  • Author
Posted

Those three hoses I mentioned were T'd together and no hoses were connected to the standard solenoid.

Well I'm not sure I only have the stock boost gauge, but it felt like 7psi all the time.

I was told it'd run like stock if Bo power is connected, then I Hooked power up and it's since been maximum boost.

I just read the solenoid is mounted upside down which gravity could be causing it to be closing. I'll try swapping it tonight.

89CAL Grand Master

89CAL

Posted
Posted

Ok the stock r33 solenoid is hooked up from actuator to solenoid to boost source. But I know the connection your talking about that is hooked up to the BOV return line. I don't remember exactally where it goes as standard but I do know that the Vac hose from the BOV return line MUST be blocked.

Not sure if you have hooked this up somewhere in the system but it is not necessary with an aftermarket boost controller. You will loose all your boost through this line if it is plugged in as it goes to the inlet side of the turbo, therefore is always suction

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