| nightblur, to my understanding the t28 wheels have been shoved in stock housing and its been called the t25/28 hybrid for years, later makers adapted the name 525. As the turbine wheel was bumped up larger than a stock turbo wheel and the compresser wheel was a bump up a tad larger than a SP500. unless Z1 does something different... to my understanding the 525s are stock turbos machine to fit a t28 CHRA. the SP500 data on this chart is clearly wrong but he inducer and exducer appear correct. You can verify that you have a T28 CHRA or wheels shoved in stock housing my measuring inducers and exducers. use this link and look at the t28 data, obviously the housing data does not apply to you. Turbo data chart
Houston Z www.houston-nissans.com
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