Waste Gate Control?

What is the best way for an Mr2? Plum it to the intake chamber or from the turbo? Current setup is from the intake chamber at the monument. I am thinking of plumbing it to the turbo again, I think this will give the turbo less stress and better throttle control. Also should stop any boost spikes.

EssDub
Your question makes no sense.
 
If you are referring to boost control via the wastegate, then your best bet is using a big single/twin wastegate setup to control the excess gas (assuming the exhaust flows well)  3SGTE engines are known for nasty boost creep as the RPMs rise with free flowing exhausts
 
If you are referring to the air bypass valve, then plumbing it back into the intake BEFORE the turbo is the way it was intended from factory.  If your turbocharger has an anti-surge front cover, then its not so much of an issue.  There are enough myths about people not using a bypass valve at all, but they're the ones destroying turbines...

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moroso sump
 
This is what has been done to this car. As you can see it not a standard sdub'

Also.... probably not the best area for this topic. probably should go here....
http://www.mr2australia.com/mr2play/tt.aspx?forumid=9

It might not stop boost spikes... but plumbing it from the turbo (provided it actually has a spot to plumb it!) might be the way to go. I don't have anything to back it up, but that's how it is from the factory anyway. 

Have to make a nipple on the pipe coming out off the turbo for the waste-gate.
 

EssDub
I know whats been done to it.
 
I still don't understand your original question.  Can you please reword it so that it makes sense?  I've offered two common issues found in these cars and the ways around them.  If one of them relates to your issue, then good :)

Well, the hose that controls the waste gate, should it be plum in from the intake camber or from the pipe which come out of the turbo before the inter cooler? I done it on my other sdub from the pipe which come out of the turbo which is like a standard sbub as this one has a gt28 on it. I know there are two ways, which is best for circuit racing?

The current setup is  a 3 port Electronic controller being controlled by the ecu. I am using a Turbodsmart Tial external 38mm wastegate it had a 18psi spring in it. I'm looking at putting a 10 psi spring in it and tune the boost control per gear, TPS angle and rpm points. So in 2nd gear with throttle at 35% Ecu sets it at 12psi, but at 6000 rpm 100% throttle 14 psi, 3rd gear 15 to 21psi depends on rpm and tps points. As an example. That is why I was asking what's the best way. Intake chamber or close to the turbo for waste gate control.

Also once you get to about double the psi of the spring you will also have trouble keeping boost stable