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Good luck with using a smaller turbo - how is that going to fix things? Am I missing something?

If the gasses wont waste - then it is pretty easy to see that there is a problem with the manifold, especially if you know the turbo is a good thing, and the wastegate is a good thing.

It seems to me that if the gasses arent wasting with the wastegate removed, there must be some crazy turbulance happening (high pressure and low pressure systems, you probably got a whole weather system happening in there!...j/k). If this has happened already, it would be pretty hard to believe that all the rest of the manifold is a good thing - manifold design is pretty critical to optimum performance.

Sorry to say this, but I believe the only real solution would be to ditch the manifold you have and get a new one - one that has proven results and works, especially if you have evidence of its performance with a similar sized turbo/engine combo.

Good luck. I have had to cut my losses in the past, sometimes its the only way.

There certainly is alot more to getting the best out of a turbo setup than it appears on the surface. Even a change of a couple of mm in pipe diameter in a manifold can make a noticeable difference to response and driveability, seen it with my own eyes - its tricky business. No wonder an experienced mechanic/tradesman likes to guard hard leant secrets and charge a few dollars more than the local autotune fellas - and so they should, its expensive business.

My motto: the good feeling of a well done job lasts alot longer than the smile you get from saving a few dollars - fortuneately there are places around like SST and Performanz that do put in the extra, learn lessons the hard way, and are able to guide noobs like me when things go cactus. Could you imagine what would happen if you took a problem like this to your local garage mechanic:)

anyway, my 0.02c

And Ditto on the manifold photo request, cheers

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