Originally Posted by Dragsteer
""Therefore if you use no amal or bleed valve, you will only achieve minimum boost/maximum lag, as the wastegate will open far too little/early. ""
I think if you remove power on alam valve you will have minimum boost, but if you connect wg directly to turbo, you will have boost that much , how much you set actuator rod.
That's not how I see it. In that situation (no amal valve) a standard wastegate will open at 6psi as that is what the preload on the spring is set to. Therefore opening and only holding the 6psi. If you had a -31 you'd get 8psi, -34 10psi or whatever it is.
An amal valve or a bleed valve work to vent off anything above a set level to ensure that a standard actuator only ever sees 6psi but in fact the turbo has spooled up 14psi (for example) of boost, just the other 8psi was vented off before it got to the actuator. If you had no amal valve and had a theoretical 14 psi of pressure, you'd rip the rod right out of the actuator. The bleed valve will introduce an air leak if you will, so that a greater amount of work is required for little pressure, or in the case of a turbo spool up a lot more boost, by fooling the actualor into thinking there is less than there actually is