Quote:
Originally Posted by Ryan P
My wastegate spring is rated at 7 psi That's the amount of pressure it will take for the actuator to open and bypass exhaust from the turbine, so it's not really a matter of not being stiff enough. It really depends on how much boost you want to run unless you get a boost controller.
What you need to worry about is the BOV spring, since those are ratted according to the amount of vacuum your engine will pull when the throttle is completely shut. A spring not properly rated for you car could lead to the BOV being partially open when it should not. My BOV has a yellow spring(11 psi) which Tial rates at -20 to -21 inHg. According to my boost gauge my motor pulls 20 inches so I'm right there.
Disclaimer: I could be off but that is my understanding of the system works.
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Haha oops I meant BOV spring, not WG spring. I've had external gates on other cars in the past, and 4 other turbo cars so I'm pretty familiar with how everything works.
My BOV box says 6PSI on it, but I haven't actually cracked the BOV open to see what spring is in there. I had planned on using the 11PSI spring as well.