"standing boost"????? Options

[teamchancery]

now i was passing through a garage and heard part of a discussion and i am wondering if anyone can shed some light.
It seems as if there was a 3sgte engine top mount IC now they have moved it to FMIC .So now the car is parked and they rev it and see that boost hits 10 psi now i heard someone say that standing psi(not sure if is actual term or is him way of expressing it) should be around 4 to 5 pound when u rev it so probably when the person goes on the road to drive instaed of the factory boost(10 psi) he could hit all 18 psi
Now the part of the explanation i heard is that because the actuator was moved from where it was and something about their being more tension that that is the reason that boost was increased over stock
(1) Could someone explain to me why when a car is parked and revved that it should only show x( 4-5 i heard them say) boost and why is this so
(2) explain to me moving actuator and creating tension is causing the car to rev over the factory boost settings

[JDM_ST205_WRC]

Question 1:

Gen I, II or III engine?? Gen I & II run TVIS & VSV, Gen III just runs VSV.
VSV will have an effect as it forces a low boost setting in 1st, 2nd & tick over.
My VSV is disabled which allows me to hit full boost when reving to 4K & above.

Question 2:

To put it simply an actuator is basically a diaphragm/spring attached to a hard fixed control arm which is directly connected to the wastegate. The tuther end of the actuator is connected to the manifold so it can read/see real time pressures.

The actuator, it’s position & set-up is calibrated so that when lets say the manifold pressure reaches 12PSi the actuator’s spring/diaphragm begins to move, this then in turn pulls the control arm which in turn begins to open the wategate, thus excess exhaust gas is bleed out of the system, bypassing the exhaust turbine wheel, controlling boost.

Now if you moved the actuator & its position in a way so that it is closer to the wastegate arm, the actuator control arm will under zero manifold pressure already have the wastegate slightly open meaning that you will have a constant bleed of exhaust gasses… this slight opening will not change in size till the actuator sees 12PSi from the manifold before it begins to open further (Although doing this will mean that it is much harder to reach 12PSi).

Move the actuator to a position away from the wastegate (putting the control rod under tension) will mean that it is pulling & holding the wastegate shut under tension so that on seeing 12PSi the actuator starts to move, but due to the tension forcing the wastegate closed it may not begin to open the wastegate till the actual manifold pressure is in fact 14PSi (Thus meaning you are running 2PSi over boost), the more tension you put into it by moving the actuator further away the more over boost you will get, BUT you can only move these things so far back, there is a limit).

In real terms it is just a very cheap way of running higher boost without buying an actuator that opens on a high manifold pressure, an EBC or a bleed valve.



"Standard boost" is 11.9 to 16.7 Psi

[teamchancery]

Question 1:

Gen I, II or III engine?? Gen I & II run TVIS & VSV, Gen III just runs VSV.
VSV will have an effect as it forces a low boost setting in 1st, 2nd & tick over.
My VSV is disabled which allows me to hit full boost when reving to 4K & above.

Question 2:

To put it simply an actuator is basically a diaphragm/spring attached to a hard fixed control arm which is directly connected to the wastegate. The tuther end of the actuator is connected to the manifold so it can read/see real time pressures.

The actuator, it’s position & set-up is calibrated so that when lets say the manifold pressure reaches 12PSi the actuator’s spring/diaphragm begins to move, this then in turn pulls the control arm which in turn begins to open the wategate, thus excess exhaust gas is bleed out of the system, bypassing the exhaust turbine wheel, controlling boost.

Now if you moved the actuator & its position in a way so that it is closer to the wastegate arm, the actuator control arm will under zero manifold pressure already have the wastegate slightly open meaning that you will have a constant bleed of exhaust gasses… this slight opening will not change in size till the actuator sees 12PSi from the manifold before it begins to open further (Although doing this will mean that it is much harder to reach 12PSi).

Move the actuator to a position away from the wastegate (putting the control rod under tension) will mean that it is pulling & holding the wastegate shut under tension so that on seeing 12PSi the actuator starts to move, but due to the tension forcing the wastegate closed it may not begin to open the wastegate till the actual manifold pressure is in fact 14PSi (Thus meaning you are running 2PSi over boost), the more tension you put into it by moving the actuator further away the more over boost you will get, BUT you can only move these things so far back, there is a limit).

In real terms it is just a very cheap way of running higher boost without buying an actuator that opens on a high manifold pressure, an EBC or a bleed valve.



"Standard boost" is 11.9 to 16.7 Psi

thanks alot thats a very comprehensive explanation