HKS External Wastegate Ports...
- Thread starter LordLo
- Start date
So if I am to add a boost controller, would I still need the side port or could I just use the top port? My reasoning is that the side port only helps open the valve at the spring pressure, but since I am going to boost higher wouldn't that mean I no longer need the side port?
By the way, my spring pressure is at 9 psi. I want to boost 12 psi.
By the way, my spring pressure is at 9 psi. I want to boost 12 psi.
No. If you just used the top port, how's the wastegate going to know when to open? Think of it like this. if you have a 9psi spring, it will open the valve when there is a 9psi pressure difference between the bottom port, and top port. (9psi on bottom - 0psi on top = 9psi). Now, if you keep the bottom connected as it was, then add 3 psi or pressure to the top port, the spring will still open when there's 9psi across it, but it will happen at 12psi, not 9, as the spring sees the 12psi - 3psi = 9psi across teh spring.LordLo said:
Side port is connected to a pressure source, plain and simple.
Top port is connected to the boost controller/s solenoid, which is connected to a pressure source.
I could draw out a diagram if you want.
So I can just T off the side port vacuum line and have my MBC tap into the top port and then attach to the T? I have done searches online and people tend to setup it up in the T configuration, but wouldn't the wastegate valve open at 9 psi, but if the mbc is set at 12 psi, how would the turbo build enough boost overcome the mbc spring if the wastegate is opening at 9 psi?
Also should the ballbearing in the MBC be facing the T side or the top port?
Finally, let's say I have a MBC set to 12 psi, would that make the turbo boost 12 psi or will it boost 12+9 psi=21psi?
Also should the ballbearing in the MBC be facing the T side or the top port?
Finally, let's say I have a MBC set to 12 psi, would that make the turbo boost 12 psi or will it boost 12+9 psi=21psi?