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Boost controller would be more your issue rather than gate size. you are right in what you are saying but it relates more to bigger turbo setups. here is an example of a modified Z18 engine running a Gt25/40 internal gated, makes over 350rwhp on 19psi. This car is at the stage wher it wants a turbo and wastegate upgrade. If you decide to go external gate a 38mm Turbosmart ultragate will be ample.

oh ok

i will check it out thanks

but dosent the boost become unsteady when you go over 14psi on a internal wastegate as its to small to pass enough exhaust gas through

post-20078-1155189488.jpg

post-20078-1155189581.jpg

gucio external wastegate is usually a better option on high output turbos. i dont see it as thatr much of an issue in ur application, especially not at 14psi. i ran 21psi with an internally gated turbo and when setup well there are no problems. usually just playing around with ur boost controller.

Cheers guys

BezerkR32: when you said its a boost controller problem we have a greddy electronic boost controller, could that be the problem. I Thought that an electronic one could modify the boost so that the boost curve even.

But would the wastegate give you more control over the boost (eg smoother boost curve etc)

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