AEM 30-6030 Series 2 Plug & Play EMS - Manual (Page 4)

Page 4 of 17
Variable Valve Control (VVC)
The VTEC output (pin B15, High Side 1 output on the EMS) switches from the low-lift
camshaft lobes to the high-lift camshaft lobes, similar to traditional Honda B-series engines.
This is controlled by the HS1 output (VTEC function) in the EMS, and can be adjusted in the
Tools>>Configure Outputs settings.
The i-VTEC output (pin B23, Injector 10 output on the EMS) advances the phase angle of
the intake camshaft; this will have effects similar to moving an adjustable intake cam gear.
This is controlled by the VVC 1 output; VVC position is monitored using the T3 input for
closed-loop feedback. The VVC settings can be adjusted in the VVC tab (which may be
hidden in the default AEM workspace).
This system is active on this EMS when used with the provided startup calibrations and can
be adjusted through the use of the
‘VVC 1 Target’ map. Adjustments to the intake cam timing
are made by changing the values in the ‘VVC 1 Target’ map per Engine RPM and Engine
Load. The values in the ‘VVC 1 Target’ map can vary from 0 degrees for zero intake cam
advance to 50 degrees for full intake cam advance.
Please note that the VVC Target angle for best power output will depend on the VTEC
settings, and vice-versa. If VTEC settings are adjusted it would be wise to adjust the VVC
Target map as well to ensure best power at all engine speeds.
WARNING:
Improper use of the Variable Valve Control (VVC) in the AEMTuner software can lead to
engine failure with certain setups!
Be very careful when building or tuning
‘hybrid’ engine combinations or using aftermarket
engine internals. OEM engines and camshafts are designed and manufactured in such a
way that the intake valves cannot be crashed into the pistons or exhaust valves regardless of
VVC advance angle and/or VTEC settings. It is NOT recommended to build setups that will
allow the intake valves to be crashed into the pistons or exhaust valves by adjusting settings
in the EMS!