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This information is for the Brucato Advanced Control Unit – ACU.
Please read these instructions carefully.
The ACU comes preprogrammed with a preliminary fuel curve for your application.
Contact Brucato Inc. with any questions you may have; 919-234-1776.
The overall fuel delivery may be adjusted with the main adjustment pot.
Acceleration Compensation feature adds extra fuel delivery when throttle movement is
detected for optimum acceleration.
The programmed fuel curve may be customized with the optional interface cable. This
allows manipulation of fuel delivery at different vacuum /RPM levels. Additionally, the
rev limiter can be adjusted.
INSTALLATION INSTRUCTIONS
The ACU may be mounted in the stock location using the stock Mercury brackets and
rubber isolators. Be sure that the battery is disconnected when connecting or
disconnecting any ECU. Connect ECU harness and vacuum line.
*** The Brucato ACU does not use the factory throttle position sensor so there is no need
to adjust the TPS. The Brucato ACU calculates virtual throttle position using engine
RPM and the map sensor. ***
IT’S THAT SIMPLE!
KNOB ADJUSTMENT SETTINGS
After removing the cover of the ACU you will see five knobs which have an adjustment
range of -15% counter clockwise and +15% clockwise.
The pointer location of the Phillips head is denoted by the slot with half circles on either
side. (Shown straight up in the first image below – 0%).
Each of the graduations on the body of the potentiometer represents approximately 4%
adjustment, however adjustments as small as 1% may be made. Negative adjustment is
counter clockwise and positive adjustments are clockwise, as shown below.
