Manual boost controller

[Chas]

I'm about to make my own manual boos controller and I don't know if I'm going to need an immediate tune afterword. Can anyone give me an answer?

[Calvinball]

Yes.

[SD_GR]

The later the car the more one ought to leave boost control to the car. The earlier cars could be OK with care from what I've seen, but by virtue of having to ask the answer is "yes."

[Chas]

The later the car the more one ought to leave boost control to the car. The earlier cars could be OK with care from what I've seen, but by virtue of having to ask the answer is "yes."

Mine is an 02 so lol

[zax]

Depends. You may be able to use a MBC, but make sure you understand a few things:

1.) An MBC will develop boost sooner than the stock EBCS, which may put your car into load cells previously untuned. If you have an MBC, you better be sure to have some way to log the car ensuring that you are NOT causing damage.
2.) Using the stock EBCS allows the car to cut boost if a fault is detected (most commonly, IAM drops below a certain value). Using an MBC alone will NOT allow the engine to cut boost if necessary and may result in significant engine damage or complete destruction.
3.) The stock EBCS targets a specific boost (in the map) using a closed-loop boost control method. The MBC does not have this capability. As such, you will need to make adjustments to the MBC when the weather or altitude changes in order to hit target boost.
4.) You CANNOT simply install an MBC and "turn up the boost." Doing so will likely result in engine damage or destruction. There is a very common misnomer that more boost = more power. This is not the case. You must understand the dynamics of a turbocharger combined with the VE of the motor before considering changing the peak boost.
5.) MBCs cannot regulate boost based on throttle position, unlike the stock EBCS. As such, a phenomenon known as PTFB (Partial throttle, full boost) can occur. This reduces the drive-ability of the car and causes the EGTs to spike.

Given these points, I typically recommend AGAINST running an MBC alone, especially if you are unfamiliar with tuning cars. If your goal is to increase spool and transient response, using a 3-port BCS (interrupt type vs. stock bleed type) tuned to your car will improve these items. Furthermore, if funds permit, running a Hybrid boost setup (EBCS parallel to the MBC) will mitigate points 2. and 5. while retaining the solid control of an MBC.

[Mikie13]

How are you going to "make" your own manual boost controller?

[SD_GR]

How are you going to "make" your own manual boost controller?

Grainger and others sell high quality brass fittings that are suitable.

[Mikie13]

Makes sense...I also don't understand why you'd do that when I've even seen people use GM and Dodge MBCs for $35 and tune with efficiency.

[zax]

Makes sense...I also don't understand why you'd do that when I've even seen people use GM and Dodge MBCs for $35 and tune with efficiency.

You're thinking of the Interrupt-type EBCS, not MBC.

[Calvinball]

Makes sense...I also don't understand why you'd do that when I've even seen people use GM and Dodge MBCs for $35 and tune with efficiency.

Sarcasm font fail?

[11blackSTi]

Grainger and others sell high quality brass fittings that are suitable.

Yep one of my friends made his own. Very simple piece actually.