Hydra Boost Controller...

[mopwer]

I know the instructions say to hook it to the intake, but would it hurt anything if I hooked it to the barb comming off the turbo housing? This is where the stock one and my HKS was hooked. Just a shorter distance and makes the tubing less complicated. Thanks.

Greg

[baktasht]

are you talking about the MAP sensor that is on the Nemesis unit itself or the boost control solenoid?

[mopwer]

Solenoid. I have the MAP to the manifold already.

[Weasy2k]

If the spot it is in shows boost its fine

Personally i would always like to hook it up to the intake manifold by Ting into where the map sensor is attached to.

[mopwer]

I would think that it may effect the signal to the MAP somewhat. That is why I wanted to keep it seperate.

Greg

[baktasht]

I have always hooked any boost controllers directly to the turbo compressor (or as close as possible) and then to the wastegate. From what I know that is the proper way to do it.

[Weasy2k]

I personally never have had problems with that but as far as compressor port yes if its open might as well!

[mopwer]

Thanks all. That's pretty much what I thought, just making sure I wasn't missing something.

Greg

[Enthalpy]

Don't tee it into the MAP sensor line. Leave that line as unmolested and unkinked as possible! If possible, make it a straight shot from the manifold to the EMS without any tee.

Tying it into either the manifold or the turbo outlet will both work just fine. I personally tie it into the turbo outlet so when I'm against the wastegate spring and at part throttle, my VE doesn't go to hell.

[mopwer]

I did end up attaching it to the compressor housing, but I did T into the MAP line to feed my boost gauge so I should get close to the same signal that the MAP was seeing. Was that a wrong move? Should I change it? There's nothing else is on that line, though. Thanks again.

Greg

[baktasht]

ya, bad move. Go from the compressor housing to the boost control solenoid, and from the solenoid to the side port on the wastegate leaving the top port of the wastegate vented to atmosphere. DO NOT tee into any ports coming from the manifold or MAP

[mopwer]

I'm out of manifold ports though. Where do I hook my boost gauge? Is there a stock sensor that I don't need now that I'm using the Hydra?

Greg

[baktasht]

You can tee off of any of the manifold ports for your boost gauge, but dont connect that same line to anything that goes to your boost controller or compressor/wastegate

[mopwer]

No, there is nothing on line with the boost controller/actuator. Are either of those two sensors used that are mounted on the trunk fire wall? There is one on the left and one on the right of the manifold.

Greg

[Enthalpy]

I teed into my fuel pressure regulator line for my boost gauge, then vacuum tested it. I left my MAP line unmolested.

Don't tie into the ports on the rear. They don't get good vacuum signal, as they are too close to the runner. Some have drilled their EGR blockoff plates for a manifold pressure tap. That makes great sense.

[mopwer]

Wait, I plumbed my MAP off the pass. side port on the back of the manifold! Damnit!! I will need to pull the manifold off to drill for more ports. Any other ideas? I need to keep the EGR in place for "emissions" checks. I have it blocked off at the head, though.

Greg

[Enthalpy]

There are two ports on the passenger's side of the manifold. Run one to the Nemesis. Run the other into a tee. From the tee, run your boost gauge and your fuel pressure regulator.

For the boost controller, come off the turbo discharge piping. You might have to tap it.

[mopwer]

One of those already goes to the FPR, I'll tap into it for the gauge. The other goes to an actuator for the throttle and t's to a sensor on the back firewall.

Greg

[Enthalpy]

You lost me. There is no throttle actuator on the stock 3S motor like there is on the 3VZ. Are you not running a 3S motor?

[RickyB]

Originally Posted by Enthalpy

You lost me. There is no throttle actuator on the stock 3S motor like there is on the 3VZ. Are you not running a 3S motor?

There is a small vacuum actuator that adjusts the throttle stop point on the 93+ MR2s. The Nemesis installation instructions on the website recommend that it be eliminated (it is held on with just two screws) when the Nemesis is installed and that the vacuum tee used to route vacuum to it be used to route vacuum to the Nemesis instead.