Versatile Engine Management System
VEMS gives you the full engine control that you need to bring out the best performance from your turbo/supercharged or normally aspirated engine.
VEMS can be configured to use almost any standard OEM sensor for
- Throttle position.
- Coolant temperature, optionally head temperature sensors for aircooled engines.
- Air temperature.
- Crank sensors configurable for the 'standard' 36-1, 60-2 trigger patterns and customizable for different timing configurations.
- Cam sensors to provide the additional signals to allow VEMS to run fully sequentially.
VEMS has the option of onboard or external Air pressure sensors, with a choice of the standard 250kpa(36psi) sensor, or the new 400kpa(58psi) pressure sensor for extreme high-boost applications.
Additionally VEMS also provides the ability to use far more advanced sensors such as
- Up to 2 Wideband O2 Bosch LSU4, as fitted to VW 1.8 Turbo engines. One of which can be used to control closed loop fuel control.
- Up to 2 Knock sensors.
- Up to 2 Exhaust Gas temperature K-type sensors.
Fuel Injection Control
Using these sensors and sophisticated real-time software VEMS provides batch or sequential control of upto 8 banks of high or low impedence injectors (2-16Ohms) that means you can drive up to 16 injectors in almost any combination. This provides the versatility to phase injectors based on RPM or boost.
VEMS has very advanced injector control software that can be optimised to suit the characteristics of any injector.
The injector map is configurable with either 8x8 or 12x12 mapping points, with user definable pressure and rpm scales.
Unlike most Engine Management Systems VEMS controls 1 to 8 coils directly, theres no need for an additional Transistor pack, or igniter. This means that VEMS can control any ignition configuration from a single coil driving a distributor, through wasted spark coil packs, and up to sequential firing coil on plug (COP) installations.
Fully adjustable dwell (coil charging) times mean that the spark control is optimised for any traditional coil. Optional specification means that newer coil's with built in igniters can be used too.
The ignition advance maps follow the same configuration specs as the fuel injection maps.
VEMS offers even more features than those listed above
- Idle Air Control (IAC), VEMS has probably the most advanced stepper driver control on the market today. VEMS can control the engine speed across a range temperatures mapped at 10 point, with either solanoid or Stepper motor type IAC valves.
- Ignition based Idle control, for engines without complicated IACs VEMS can be configured to control the idling engine's ignition advance to control even the lumpiest idling engine.
- Fuel Pump and Coolant Fan relay control.
- AlphaN blending for normally aspirated engines with aggressive cams.
- Customised triggering (via RPM or pressure) for up to 2 channels which can be used to trigger Nitrous solenoids, Water injection, or variable cam (VTEC, VVT, TVIS etc.) solanoids.
- Closed loop wide band fuel control. When configured VEMS will optimise your running conditions based on the Wideband's feedback.
- Boost control (using one of the customised trigger channels) is configurable against RPM and throttle position.
- Anti-lag (ALS) using ignition cut to ensure that high EGTs dont hurt your turbo.
- Optional LCD display to provide real-time information on water, air and exhaust gas temperatures, air fuel ratio, RPM and boost pressure
- Soft and hard rev limiters along with overboost fuel cut to help protect your engine.
For ease of use you can't beat a laptop though, for this VEMS uses the free MegaTune application which provides realtime tuning and datalogging capabilities. There are plenty of datalog analysis programs that use the MegaTune datalog format which provide the user with all they need to further fine tune their installation.
VEMS in action
VEMS hs quite a big following with the Scandinavian Volvo and BMW tuning crowd, where its advanced fuel, ignition, turbo control and unbeatable pricing make VEMS the perfect choice. You can see videos of some of these cars here: