External wastegate question :)

[Scullies]

I have a precision wastegate to fit and was wondering if the following picture is the best way to set it up.
Should I tee the boost feed to the wastegate and N75 or would it be better to run each boost feed separately. 1 line to wastegate and one line to N75?

 

[Andrew@A.L.D]

top of the waste gate needs to be vented to the atmosphere

I will have to get a picture of my set up

 

[Scullies]

Thanks Andrew, that would help my tiny brain process this rocket science

So when the top of wastegate is vented to atmos, is your boost controlled by the spring rate only ?

 

[Andrew@A.L.D]

It should be like this i think

 

[Scullies]

I dont understand why the boost signal is feeding pressure below the spring. Wont the spring rate become "less" as more boost is pushed into the wastegate, causing the spring to compress and the valve to open well before the spring rate should allow it.
Then when the N75 startes to redirect the boost the spring rate will push the valve closed again and increase boost.

Am I completely wrong about this ?

 

[badger5]

spring rate = actuator pressure..
boost into lower port, pushed open the gate, ie n75 controls the boost

single port mode