Up grade from 40mm wastegate to Turbosmart 45mm wastegate
 

Been fighting boost creep ever since I fix the exhaust leak
Try increase back pressure by put back Cat n silencer it help but still creep after 6000

So finally decide to upgrade to wastegate

Man talking about the size different !!
Will report tonight when I finish the install !!


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The reason of Boost creep the location of wastegate , last owner install in such funky location with knight sport hight flow , there is no way 38mm wastwgate will be enought !!
But beside that , every thing work fine, lets why decide still keep same location , but just upgrade the wastegate instead

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High velocity spot with bad entry angle means you need a lot of wastegate surface area.

PO placed the wg right on the hotside of the turbo?

That's right, but still cheaper to build manifold

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Here anther forum members idea

The 40mm wastegate was on hot side since 2000
So no problem yet
J