Oh yeah, I also rigged up the boost gauge today. I am running right at 14 PSI max, and the whining sound comes at about 8-10 PSI, and just gets louder as the boost goes up.

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My Primary Driver - '85 300CD - 4-speed conversion, 2.47 rear, lowered, euro headlights, rebuilding (not restoring so much)

Wife's - '08 Saab Sportcombi Aero

Riding a '03 Yamaha Warrior