LETRIPP II XMS4A DIY MANUAL V2.1 www.perfectpower.com i
PERFECT POWER XMS4A – Engine Management System DIY MANUAL V2.1
Table of Contents: Page no:
1.
INTRODUCTION.................................................................................................1
2. PARTS SUPPLIED IN THE KIT...............................................................................1
3. WHY SHOULD YOU READ THIS MANUAL?...............................................................1
4. EXPLANATION OF XMS4 UNITS AVAILABLE............................................................2
5. TECHNICAL DETAILS ..........................................................................................3
5.1 FUEL INJECTION.............................................................................................3
5.2 IGNITION ......................................................................................................3
5.3 ACCELERATION ENRICHMENT...........................................................................4
5.4 INJECTOR/ENGINE PRIMING.............................................................................4
5.5 TRIGGER INPUTS............................................................................................4
5.6 BOOST CONTROL............................................................................................4
5.7 PRIME (FUEL).................................................................................................4
5.8 IDLE CONTROL...............................................................................................4
5.9 SETPOINT CONTROL .......................................................................................4
6. FEATURE EXPLANATION......................................................................................5
6.1 LAUNCH CONTROL..........................................................................................5
6.2 EXTERNAL SUPPLY TO SENSORS.......................................................................5
6.3 MAPS A / B....................................................................................................5
6.4 CALIBRATION.................................................................................................5
6.5 FUEL INJECTION MAP......................................................................................5
6.6 IGNITION MAP ...............................................................................................5
6.7 COMPENSATION MAP ......................................................................................5
6.8 BOOST CONTROL............................................................................................6
6.9 SETPOINT......................................................................................................6
6.10 MAXIMUM RECORDINGS..................................................................................6
6.11 ONBOARD LOGGING (COMING SOON)...............................................................6
6.12 COMMUNICATION CONNECTION .......................................................................6
6.13 USB DRIVERS SETUP.......................................................................................7
7. COMPUTER REQUIREMENTS ................................................................................7
8. PIN OUTS OF XMS4A UNIT ..................................................................................8
8.1 XMS4A PIN-OUT TABLE....................................................................................8
8.1.1 XMS4A IGNITION PIN-OUT CONNECTOR (6 PIN)..............................................8
8.1.2 XMS 4A INJECTION PIN-OUT CONNECTOR (8 PIN) ...........................................8
8.1.3 XMS 4A AUXILIARY CONNECTOR (4 PIN) ........................................................9
8.1.4 XMS 4A MAIN CONNECTOR (22 PIN) ..............................................................9
9. ASSESSING YOUR CAR’S FUEL SYSTEM...............................................................10
9.1 IS YOUR CAR READY FOR FUEL INJECTION?.....................................................10
9.2 HOW TO MAKE YOUR CAR READY FOR FUEL INJECTION .....................................10
9.3 CONCLUSION...............................................................................................11
10. ASSESSING YOUR ENGINE................................................................................11
10.1 COMPATIBLE TRIGGER WHEEL........................................................................11
10.2 CAMSHAFT SENSOR......................................................................................12
10.3 HOW TO INSTALL A COMPATIBLE WHEEL AND PICKUP SENSOR ..........................12
10.4 WHICH SENSORS ARE MISSING?....................................................................13
10.5 INJECTOR RESISTANCE .................................................................................13
10.6 MAKE SURE THE ENGINE HAS THE BASICS.......................................................14
10.7 CONCLUSION...............................................................................................14
11. WHERE TO FIT YOUR XMS4A?............................................................................14
11.1 SUITABLE PLACES ........................................................................................14
11.2 UNSUITABLE PLACES ....................................................................................15
11.3 CONCLUSION...............................................................................................15
12. WHERE TO FIT THE IGNITION AMPLIFIER? ..........................................................15
12.1 SUITABLE PLACES ........................................................................................15
12.2 UNSUITABLE PLACES ....................................................................................16
12.3 CONCLUSION...............................................................................................16
13. SCREENED CABLE............................................................................................16
13.1 WHAT IS A SCREENED CABLE? .......................................................................17
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