GReddy Profec - Manual (Page 32)

■Programming the Boost Stability■
GAIN
SET
SET
Adjust GAIN value to +
Adjust GAIN value to ‒
Boost
Time
Boost
Time
GAIN
Controls the boost curve tendency after the START pressure value. (stability and
consistency at higher RPMs)
・Program a boost level with the SET and START, before adjusting the GAIN.
・If the START pressure value is set to 0x100kPa or 0PSI, GAIN will not function.
Boost settings
(1) In a BOOST mode set up screen, highlight GAIN and
press the SET DIAL to confirm.
(3) To program the GAIN % value, press the SET DIAL to
confirm and return to the BOOST mode set up screen.
(2) Rotate the SET DIAL to change a GAIN % value.
* To cancel and return to the previous setting and the
BOOST mode set-up screen, press MODE.
Mode s set up screen
Mode s set up screen
To improve boost from dropping at higher RPM (boost fall
off), adjust the GAIN to a positive value. There may be
vehicles or turbocharger configurations which will not
allow for improvements.
Once the SET and START pressure values are adjusted to obtain the desired boost pressure, the GAIN can also be
used to drop boost pressure at higher RPMs by setting a negative value for the GAIN.
If the GAIN value is programmed too high, it may cause unstable boost, with a
fluctuating boost curve (boost creep).