[ACasper85]

The boost control solenoid control circuit shorted to ground, boost control solenoid valve stuck closed or a restriction in the boost source or signal hoses will cause full boost to be commanded at all times and a possible overboost condition during high engine load situations.

i read this at work one day haven't tried it yet. gotta get a boost gauge to confirm that this is a true statement or not and to see how high the boost goes. anybody with a boost gauge wanna try and let us now that would be great. i tried viewing the psi with a tech 2 but i wasn't getting an accurate reading.

 

[redlin-er]

The boost control solenoid control circuit shorted to ground, boost control solenoid valve stuck closed or a restriction in the boost source or signal hoses will cause full boost to be commanded at all times and a possible overboost condition during high engine load situations.

i read this at work one day haven't tried it yet. gotta get a boost gauge to confirm that this is a true statement or not and to see how high the boost goes. anybody with a boost gauge wanna try and let us now that would be great. i tried viewing the psi with a tech 2 but i wasn't getting an accurate reading.

Removing the hose from the sc will create the same condition as restriction in the boost source or signal hose.

Someone second that?

 

[goofyguy]

yeah the wastegate/bypass wont open so itll boost to max all the time. While this seems like a good idea. It gives no time for the intercoolers liquid to cool because its always boosting. And you milage will suffer because your once again always boosting.

 

[John]

actually the sc is always doing the same thing regadless if the hose is hooked uo or not the pressure is being controled after the super charger not in the supercharger. and my gauge still shows vacuum in the intake unless i accel just like before the hose pull. and on the mileage im doing my first full tank with hose pulled to check but so far mileage is tracking the same as before mod. and to answer the psi question again, 14.5 psi at 6000 rpm it does do a 15psi spike if you hit rev limiter but i dont think 15 psi is going to hurt this engine.

 

[goofyguy]

you will get boost when you accel all the time unless you baby it. The problem is that after you let off it has no where to go. That keeps the pressure in the supercharger manifold creating heat.

 

[John]

you will get boost when you accel all the time unless you baby it. The problem is that after you let off it has no where to go. That keeps the pressure in the supercharger manifold creating heat.

thats what im saying my gauge goes to vacuum as soon as i let off of the gas, but i dont know where the pressure goes goofy, not sure at all on that i think the engine stiil bleeds it off through the intake. any of you boost pros know for sure?

 

[Sp00ner]

I'm under the impression that's what were arguing about. I thought the boost was bled off due to a signal, generated by the solenoid that people are unhooking? So if you're unhooking the signal to bleed pressure, then the car isn't going to bleed to pressure since it thinks there isn't any reason. Right?

I can't dispute your numbers, but my understanding of the systems controls are above.

 

[John]

I'm under the impression that's what were arguing about. I thought the boost was bled off due to a signal, generated by the solenoid that people are unhooking? So if you're unhooking the signal to bleed pressure, then the car isn't going to bleed to pressure since it thinks there isn't any reason. Right?

I can't dispute your numbers, but my understanding of the systems controls are above.

okay i just learned that the pressure goes out the exhaust which is where the wastegate is. no matter how much boost is being pushed in the intake it gets released through the engine as soon as you let off of the gas,the solenoid only allows the bypass to bleed pressure to regulate the boost not to release it when slowing down.

 

[redlin-er]

I'm glad someone's got it right, John.