It is critical that the MBC be adjusted before you drive
your car under sustained boosted conditions; Failing
to do so could result in boost levels higher than the engine maybe
capable of maintaining, leading to possible engine damage. I
have preset the MBC at approximately 15psi of boost to provide a
basic adjustment starting point. This may be slightly higher or lower
on your car.
After you have installed the MBC, gently drive your car in a controlled
environment (ie. empty parking lot or unused country road) gradually
ease on the accelerator building boost and noting maximum pressure
on the boost gauge. Under any circumstance DO NOT operate your car
over the maximum known sustainable boost pressure according to other
modifications completed. If you are not sure what the maximum sustainable
boost pressure for your DSM is, do not exceed 13psi.
To Increase boost:
Loosen the jam nut off gently and turn the bolt in (clockwise).
Adjustments are very minute, so do them in small increments,
adjust, test, adjust, test…etc. failing to do so could result
in generating extremely high boost levels and damaging your engine.
To Decrease boost:
Loosen the jam nut off gently and turn the bolt out (anti-clockwise).
Adjustments are very minute, so do them in small increments.
Once you have achieved your desired boost level setting, tighten
the jam nut down against the body of the MBC. This will lock the
bolt into place.
Failing to tighten the jam nut could result in the bolt backing
itself out which would create higher than desired boost levels. The
worst case would be loss of the bolt and internal components, resulting
in complete loss of control over boost. Note: in the year that I
have used this controller, I have never had any problems of this
type, but I must make you aware of the possibilities that it can
happen if it’s not properly maintained.
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