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beepbeep beepbeep is offline
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Join Date: Jun 2001
Location: Sweden
Posts: 5,565

If possible, I advice not to use dial-style boost and to let that part be handled by ECU. Reason for this is that you can connect ECU to control the boost in such way that it keeps wastegate totally shut until preset boost is achieved, then open it just enough to keep that bost.

Also, you can connect it in differential fashion (feeding boost signal trough solenoid to the top portion of the bell), thus further enhancing the spring force that keeps the valve seated. This will guarantee zero boost creep and best possible spoolup. Also, it will prevent "oh, let's see what this knob do...hmm, why does engine sounds funny?"-problems.

MBC is mechanical device and will start opening the wastegate in advance, in "analog" fashion. This might or might be not be felt, YMMV.

Thank you for your time,
Old 08-27-2008, 12:44 AM
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