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My IS with RB turbos running 17psi and 13.5 degrees at 6k rpms was only 479whp on a dyno I based lined 282 whp. Unless I am reading the logs wrong, I am curious how you got another 70 whp out of these turbos with approx the same boost and timing.
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2015 - Cayman GTS - Stock
2011 - 335is e92 - Cobb PTF E40/Rob - Beck/AR/Helix (458 rwtq and 479 rwhp) - Retired
2007 - 911 Turbo - EP1/AMS (617 awtq and 500 awhp) - Retired
2008 - 335i e92 - Cobb/AR/Helix/OSS (384 rwtq and 356 rwhp) - Retired
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