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Perfect Power Piggybacks and Stand-ALone ECUs

Please be patient, certain parts are made per order and require time to manufacturer. All parts will be immediately shipped as they become available. All prices do not include any core charges, shipping, taxes or installation charges. All orders are considered 'Special Order' and are paid in full at time of order via wire transfer or as agreed. All pricing must be verified the day of quote, at time of order, at time of shipping and will be adjusted based on the value of the Dollar Internationally. Any deficiency is immediately due upon billing and before delivery.

Perfect Power Products

The Perfect Solution to a Powerful Engine Management System


XMS4 - Group A

The XMS4 A is the most economical product in the range. The range is ideally suited for 4 cylinder engines, but can be used for 8 cylinders in batch mode injection and 8 cylinders wasted spark or distributor applications.

The XMS4A has:

4 Direct injector drives

4 Set-point drives

4 Ignition signal outputs




40 MIPS processor Lightning fast response
2 complete maps For two different settings
Automatic/Manual Map switching Allows you choose the map you like best
Map Switching while driving Seamless transition gives smooth ride
1 x Rev counter output drive To operate a conventional rev counter
Easy calibration on all inputs Use any sensor
1 x 0-5V TPS input

For throttle and acceleration

Reverse TPS possible To suit your sensor
TPS input calibration Linear, Un-linear and manual
5V output to drive TPS/AMP Can power up to 0.5 Amp
4 SET-POINT drive outputs Drives up 1Amp each
Powerful 14 item Set-point Can be sequenced to logical AND/OR
High/Low limits on Set-points Gives great flexibility
Each Set-point can be linked

This allows the most complex switching

1 x 0-5V Engine Temperature input Can be calibrated to suit your sensor
1 x 0-5V Air Temperature input

Can be calibrated to any sensor

Build in AMP sensor 2.5 bar Calibrated by factory
4 Ignition signal drives Positive output pulse
4 Direct injection outputs

For 12 Ohm injectors

384 fuel map sites For 3 dimensional fuel control
Fuel with 3x24 sites side maps For AMP/Air/Engine temperature
8 point interpolation between sites Very smooth control
24 AMP map sites Covers the range 0.2 to 2.4 BAR
Interpolation between AMP sites

Smooth control

Injector trim available Balance the injectors or the manifold flow
Launch control Enabled via external switch input
USB 2.0 Communication For any laptop in real-time
CRANK (CB1) inputs For balanced or single input
Crank trigger level settings To suit you pickup
CAM (CB2) Inputs For balanced or single input
CAM trigger level settings To suit your pickup
Electronic Boost Control With maps and targets for turbo installation
Powerful Fault indications Aids in installation
RPM calibration Set range and linear/un-linear/manual steps
Tuned Values have immediate effect Live (real time) tuning with USB
Idle control circuit With fall-back and target specifications
Comprehensive Status report In real time, shows what happens
Monitor engine performance In real time, numeric and graphical
Logging feature to a PC Allows you to playback the data
Sequential/Batch mode operation In case you don’t have a CAM trigger
384 sites Ignition map Change ignition angle in fine steps
3x24 ignition side maps For AMP/Air/Engine temperature
3x24 Boost control sites Change the turbo boost as required
3x24 Acceleration sites

Smooth acceleration

24 Dwell map sites For high performance coils
20  Parameter sites For general setting up
Ignition reference angle

For synchronizing engine to pc

Ignition advance limit Restricts ignition advance range
Ignition retard limit Restricts ignition retard range
Start time Sets the ON time for the fuel pump
Acceleration detection Settable sensitively to throttle movement
Launch RPM Target RPM for launch control
Boost gain Set the Boost control gain
Min Injection Injection is cut if below the milli second time
Cylinders To suit your engine upto 8 cylinders
LSU4 zero For calibrating the XMS to external gauge
Neg crank edge Adapt to your crank signal
High CB1 level Adapt to sine or square wave crank signals
Neg cam edge Adapt to your cam signal
High CB2 level Adapt to sine or square wave cam signals
Inverse TPS en Specify Up/Down direction
Fuel Extrap en Extrapolates in the 384 fuel map
AMP Extrap en

Extrapolates in the 24 amp fuel map

Cam every 2 turn For sequential operations
SetP map switch Software map switching
Instantly Saves tuning changes

Everything is live!

Operates with LETRIPP Software Easy and fast control
Instant help on every item Build in
Help on any faulty item Indicated in red
USB power up Unit will operate from USB power

Even though this model is the smallest in the entire XMS4 range, they all boast the LETRIPP SOFTWARE features. If you don't need all the fancy hardware, then the XMS4A is the product for you.

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