how do you work a manual boost controller - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

gregsr20 · 03-29-2003, 02:07 PM

turned all the way open is stock boost, the more you tighten the more boost, is this correct,?????, or the other way around

RacerBoi · 03-29-2003, 02:33 PM

All the way open should be full boost. The controller is hooked up in somewhere on the wastegate actuator hose. Its just a bleed valve that vents pressure into the air fooling the wastegate into thinking the turbo is boosting less than it actually is.

gregsr20 · 03-29-2003, 02:51 PM

all the way "should" be, or "is" full boost

uiuc240 · 03-29-2003, 03:21 PM

Think of it by the way the controller works:

There is a spring in there holding a ceramic or steel ball over a hole. Once that ball moves, the pressure is released through the other side, and the wastegate opens. The more spring pressure you have, the harder it is for the ball to move. Therefore, by adding more spring pressure, you allow more boost to be created before the wastegate opens.

So, if you loosen the screw all the way out that holds the ball and spring in place, you will effectively eliminate that system (putting you at stock boost). The tighter you make it, the more boost you will create.

Make sense?

Eric

gregsr20 · 03-29-2003, 03:51 PM

thanks

Jsquared · 03-29-2003, 10:10 PM

email the company that made the boost controller, usually they'll tell you about how much turns it takes to do X amount of boost (e.g. one full turn of the screw is about 1 psi, etc.)

Fibercus · 03-30-2003, 12:18 AM

Quote:

Originally posted by uiuc240
Think of it by the way the controller works:

There is a spring in there holding a ceramic or steel ball over a hole. Once that ball moves, the pressure is released through the other side, and the wastegate opens. The more spring pressure you have, the harder it is for the ball to move. Therefore, by adding more spring pressure, you allow more boost to be created before the wastegate opens.

So, if you loosen the screw all the way out that holds the ball and spring in place, you will effectively eliminate that system (putting you at stock boost). The tighter you make it, the more boost you will create.

Make sense?

Eric

Nice interpretation, now I even understand how it works.

03-29-2003, 02:07 PM	#1
gregsr20 Zilvia Member Join Date: Jan 2003 Location: SAVANNAH, GA. Age: 42 Posts: 155 Trader Rating: (0) Feedback Score: 0 reviews	how do you work a manual boost controller turned all the way open is stock boost, the more you tighten the more boost, is this correct,?????, or the other way around __________________ fast cars are dangerous, save lives drive HONDA'S

03-29-2003, 02:33 PM	#2
RacerBoi Leaky Injector Join Date: Jul 2002 Location: Annapolis, MD Age: 41 Posts: 130 Trader Rating: (0) Feedback Score: 0 reviews	All the way open should be full boost. The controller is hooked up in somewhere on the wastegate actuator hose. Its just a bleed valve that vents pressure into the air fooling the wastegate into thinking the turbo is boosting less than it actually is. __________________ '98 240SX -s13 -> s14 Injen intake swap -B&M Short Shifter

03-29-2003, 02:51 PM	#3
gregsr20 Zilvia Member Join Date: Jan 2003 Location: SAVANNAH, GA. Age: 42 Posts: 155 Trader Rating: (0) Feedback Score: 0 reviews	all the way "should" be, or "is" full boost __________________ fast cars are dangerous, save lives drive HONDA'S

03-29-2003, 03:21 PM	#4
uiuc240 Nissanaholic! Join Date: Apr 2002 Location: Naperville, IL Age: 46 Posts: 2,093 Trader Rating: (0) Feedback Score: 0 reviews	Think of it by the way the controller works: There is a spring in there holding a ceramic or steel ball over a hole. Once that ball moves, the pressure is released through the other side, and the wastegate opens. The more spring pressure you have, the harder it is for the ball to move. Therefore, by adding more spring pressure, you allow more boost to be created before the wastegate opens. So, if you loosen the screw all the way out that holds the ball and spring in place, you will effectively eliminate that system (putting you at stock boost). The tighter you make it, the more boost you will create. Make sense? Eric __________________ 2002 Mazda Protege5 1989 S13 w/SR20DET (sold)

03-29-2003, 03:51 PM	#5
gregsr20 Zilvia Member Join Date: Jan 2003 Location: SAVANNAH, GA. Age: 42 Posts: 155 Trader Rating: (0) Feedback Score: 0 reviews	thanks __________________ fast cars are dangerous, save lives drive HONDA'S

03-29-2003, 10:10 PM	#6
Jsquared Zilvia Junkie Join Date: Feb 2003 Location: Raleigh, NC//Charlotte, NC Age: 42 Posts: 503 Trader Rating: (0) Feedback Score: 0 reviews	email the company that made the boost controller, usually they'll tell you about how much turns it takes to do X amount of boost (e.g. one full turn of the screw is about 1 psi, etc.)