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Message: [QUOTE="superpsd, post: 1472649, member: 15821"] I want to say tighter gated housings are going to show less top end performance than a looser non gated. You bleeding off energy that the turbine needs. Without testing I could be wrong but I do believe it's been tested hence why high hp ends run loose larger housings. There is always going to be a trade off to some degree. I can drastically change how my turbo spools with making only SOI changes. Which is still a balancing act. Advanced SOI=equals increased CP lower EGT which hurts spool up. Retarded SOI lowers CP and increases EGTs to put heat energy into the turbine and lighting the turbo. [/QUOTE]

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