Seller notes

新增網頁1 　 　 　 APPLICATION 　 　 Used to change out the spring pressure on the Tial 50mm BOV to affect the BOV response tuning to reduce compressor surge(different spring levels affect amount of vacuum required on each engine to open the BOV on throttle release) Color Use Spring Engine Vacuum Reading Pink -12Psi(-24in/Hg) -22 and -23 in/Hg Unpainted -11Psi(-22in/Hg) -18 and -21 in/Hg White -9 Psi (-18in/Hg) -14 and -17 in/Hg Black -7 Psi (-14in/Hg) -10 and -13 in/Hg 　 　 ITEM INC...

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