Dual Port Actuator

[chaze1385]

I think i am going to try a dual port actuator. Have used them in the past on other applications. Can usually contol boost spiking better with them.

[Jaxx]

this is interesting. more info? I've never seen a WG actuator like this.

[chaze1385]

the top connection would be connected like normal. the bottom would be connected to a regulated pressure source. a lower pressure than on the top of the diaphram. allows you to run higher boost and be more stable and controllable. you can also control the ramp up, how fast or slow the boost builds. and when set up right it shouldnt spkie as bad as a single port. They have been around forever. do soem research on them www.autospeed.com is a good place to read about boost control.

boost control

[BlueS70T5]

i have one on my turbo but only use the one port and leave other one open what do you hook the other port up to another vacuum?

[chaze1385]

the other port will have a pressure signal as well. like from your vacuum tree. but the pressure willhave to be regulated somehow. many ways to do this. can be as simple as a few vacuum t's spliced into the line to bleed of some of the pressure going to the second port. or a pneumatic air regulator. if you have equal pressure going to both ports the actuator is not going to open at all.

[chaze1385]

i copied and pasted this from wikipedia.com but there is much more info out there.

[edit] Pneumatic

The simplest control for a wastegate is to supply boost pressure directly from the charge air side to the wastegate actuator. A small hose can connect from the turbocharger compressor outlet, charge pipes, or intake manifold to the nipple on the wastegate actuator. The wastegate will open further as the boost pressure pushes against the force of the spring in the wastegate actuator until equilibrium is obtained. More intelligent control can be added by integrating an electronic boost controller.

Standard wastegates have one port for attaching the boost control line from the charge air supply line or boost control solenoid. This is the most common configuration and the only type of configuration found on internal wastegates.

A dual port Tial 44mm wastegate. The side port is the primary port. The top port is the secondary port and not necessary for proper operation.A dual port wastegate adds a second port on the opposite side of the actuator. Air pressure allowed to enter this second port aids the spring to push harder in the direction of closing the wastegate. This is exactly the opposite of the first port. The ability to help the wastegate remain closed as boost pressure builds can be increased. This also adds further complexity to boost control, requiring more control ports on the solenoid or possibly a complete second boost control system with its own separate solenoid. Use of the second port is not necessary. Secondary ports, unlike primary ports, cannot be simply attached to a boost control line and require electronic control to be useful.

[Che'_Moderator]

i copied and pasted this from wikipedia.com but there is much more info out there.

[edit] Pneumatic

The simplest control for a wastegate is to supply boost pressure directly from the charge air side to the wastegate actuator. A small hose can connect from the turbocharger compressor outlet, charge pipes, or intake manifold to the nipple on the wastegate actuator. The wastegate will open further as the boost pressure pushes against the force of the spring in the wastegate actuator until equilibrium is obtained. More intelligent control can be added by integrating an electronic boost controller.

Standard wastegates have one port for attaching the boost control line from the charge air supply line or boost control solenoid. This is the most common configuration and the only type of configuration found on internal wastegates.

A dual port Tial 44mm wastegate. The side port is the primary port. The top port is the secondary port and not necessary for proper operation.A dual port wastegate adds a second port on the opposite side of the actuator. Air pressure allowed to enter this second port aids the spring to push harder in the direction of closing the wastegate. This is exactly the opposite of the first port. The ability to help the wastegate remain closed as boost pressure builds can be increased. This also adds further complexity to boost control, requiring more control ports on the solenoid or possibly a complete second boost control system with its own separate solenoid. Use of the second port is not necessary. Secondary ports, unlike primary ports, cannot be simply attached to a boost control line and require electronic control to be useful.

Thats a wastegate this is an actuator. Just buy a boost controller. Its easier. If you are really pushing open 24 pounds springs you can justify an external gate. Until then a booth controller will address pretty much any issue.

[JHEIII874T5M]

Why? The stock wastegate will hold a good 16-17 PSI to redline when in good, working condition. If that doesn't do the trick, get a 300/70 wastegate off the 19T and on my car that's proven to hold 18 PSI to redline. Anything past 18 PSI and the turbo's out of its efficiency range anyways. On the 15G anything past 15-16 PSI and it's pretty much out of its efficiency range.

[lextildeath]

I love how Sean Paul is smelling his fingers in your sig. He musta done something naughty!

Thats a wastegate this is an actuator. Just buy a boost controller. Its easier. If you are really pushing open 24 pounds springs you can justify an external gate. Until then a booth controller will address pretty much any issue.