DIS 8 Installation and Instruction Manual For Accel DFI part number: 75610 VER11
DIS 8 Table of Contents Parts Included.......................................................................... 2 Introduction ............................................................................. 3 Installation............................................................................... 4 Setting Custom Firing Order ..................................................... 9 Sequence Firing Order ............................................................
DIS 8 Introduction Congratulations on the purchase of your new Accel DFI Digital Ignition System (DIS 8). This Multi-Strike system uses the latest available technology to offer unparalleled accuracy, repeatability, and reliability. The DIS 8 unit operates multiple coil applications using one of two triggering configurations: 8-Channel Mode or Cam/Crank Mode. The DIS 8 is also capable of timing retard and rev limit functions.
DIS 8 Installation Read over this entire document before beginning installation! The DIS 8 may be located inside the car or in the engine compartment. If you are mounting the controller in the engine compartment, select a location with minimal exposure to water as a safeguard. When mounting the unit in the inside of the car find a well ventilated area to reduce heat created by unit. Route the wiring well away from any moving parts or extreme heat sources like header pipes, etc.
DIS 8 8 Channel Mode Wiring Harness In the 8 Channel Mode the DIS 8 is connected inline to the coils. The coil negative trigger signal from the ECM is sent to the DIS 8 coil Input harness and amplified, and then sent to the negative side of the coil. 8 Channel wiring overview DIS 8 module used with factory ECM.
DIS 8 Coil Input Harness PIN A B C D E F G H J K CHANNEL Coil 1 Input Coil 2 Input Coil 3 Input Coil 4 Input Switched Ignition Not Used Coil 5 Input Coil 6 Input Coil 7 Input Coil 8 Input 6 WIRE COLOR Purple Red/White Blue Green/White Pink Green Blue/White Red Purple/White
DIS 8 Coil Output Harness In the 8 channel mode, a trigger signal on any input channel will result in a coil firing on the corresponding output channel. PIN A B C D E F G H J K CHANNEL Coil 1 Output Coil 2 Output Coil 3 Output Coil 4 Output Coil Positive Coil Positive Coil 5 Output Coil 6 Output Coil 7 Output Coil 8 Output WIRE COLOR Purple Red/White Blue Green/White Pink/Black Pink/Black Green Blue/White Red Purple/White Do Not touch output/primary coil wires with key ON or while the engine is running.
DIS 8 CAM/CRANK Mode Wiring Harness In the Crank/Cam mode the DIS 8 receives a Crank (EST) and a Cam input. The DIS 8 then processes the input signals into 8 separate output signals. The signals are sent to the negative side of the coils in the order set by the firing order in the handheld controller. The crank position trigger / EST / Points Trigger signal is a rising edge (low– to-high), and the cam position is a falling edge (high-to-low) transition.
DIS 8 Coil Output Harness Unless you intend to operate the module in Sequence Firing Order, you should wire the coil outputs so as to match up with the physical cylinder number on the engine. The module will fire each output in the firing order programmed via the handheld controller. In Sequence firing order, the module will fire the coil outputs in order (1, 2, 3, 4, 5, 6, 7, 8).
DIS 8 WASTE SPARK MODE DIS 8 module used in Waste Spark Mode (typical Chevy) Set Ignition Type to Waste Spark Mode. Then go to Firing Order and select Custom Firing Order (see page 11). Set the firing order to 1432 when using above diagram. Note when in Waste Spark mode the timing value will be doubled when viewed with a timing light. Example if the timing light flashes at 20 degrees BDTC the actual timing is 10 degrees BDTC.
DIS 8 Setting Custom Firing Order Note: You must set the Number of cylinders before entering the custom firing order. To set the Custom Firing order: 1. Use the Mode keys on the handheld controller and scroll down to the FIRING ORDER. 2. Use the Value UP or DOWN keys and go to CUSTOM SET. 3. Depress the Mode UP key to enter the custom firing order. Depressing the Value UP or DOWN keys will change the highlighted cylinder number. 4. Mode UP key will highlight the next cylinder.
DIS 8 DIS 8 With ACCEL DFI or other fuel Injection systems using the ACCEL DUAL SYNC DISTRIBUTOR. A Dual Sync distributor can be used with the ACCEL DFI Generation 7 or other fuel Injection system with an EST output to operate in Cam/Crank mode. For ACCEL DFI Generation 7 systems an adaptor harness part# 77101 can be used. The adaptor harness has 3 flying leads• Dark Blue Wire – This is the EST lead to be connected to pin “A” Coil Input 1 on the Coil Input Harness.
DIS 8 Cam/Crank Mode with GEN 7 / THRUSTER EFI: In the Cam/Crank mode, channel 1 is the Electronic Spark Timing (EST) trigger, and channel 2 is the cam position trigger. The DIS 8 uses the EST and Cam inputs and processes the inputs into 8 separate outputs allowing the use of coil-per-cylinder operation. The firing order must be set with the handheld controller in Cam/Crank mode.
DIS 8 Installing the ACCEL/DFI Dual Sync Distributor. Example using Small Block Chevy application: 1) Rotate balancer until Top Dead Center # 1 Cylinder. 2) Install distributor in engine and plug in connectors. Make sure 8 Channel box is fully connected.
DIS 8 DIS 8 With ACCEL DFI or other fuel Injection systems using the Crank Trigger / Cam trigger with Hall Effect Sensors Under Ignition Type, Select Custom in the Systems Screen. Then: Select Hall Effect under Crank Signal Type, switch crank trigger edge to rising. Select Hall Effect under Cam Signal Type, check cam trigger to make sure switch is on falling edge. Select Sink, Points (Open Collector) for Output Signal Type. Hit F10 after each selection or Send all to ECM.
DIS 8 DIS 8 With ACCEL DFI or other fuel Injection systems using an IPU Crank Trigger / Hall Effect Cam trigger. Under Ignition Type, Select Custom in the Systems Screen. Then: Select IPU (Bipolar Pulse) under Crank Signal Type, switch crank trigger edge to rising. Select Hall Effect under Cam Signal Type, check cam trigger to make sure switch is on falling edge. Select Sink, Points (Open Collector) for Output Signal Type. Hit F10 after each selection or Send all to ECM.
DIS 8 Handheld Controller The controller has a 9-pin DSUB socket which plugs into the on the end panel. The controller does not need to be plugged in for the ignition to run, only to change the settings. The control “modes’ are as listed below. Setting Main RPML Auxiliary RPML Range / Resolution 1000-12800/100 RPM 1000-12800/100 RPM High Speed Retard #1 .1-15 Degrees/.1 degrees Auxiliary RPML 2 1000-12800/100 RPM Start Retard Window RPM Switch LO Activation RPM 0-10 Degrees/.
DIS 8 Trigger Mode Select either “8 Channel/Input” or “Cam/Crank” Input. Select either “Waste Spark” (coil fires two cylinders) or “Coil Per Cylinder”. Ignition Type Firing Order Select a preset firing order or “Custom Set” and enter your own. To set the modes, plug the controller in and turn on the ignition. After a brief pause, the controller display will light up. Use the “MODE” keys to select the desired mode, and then use the “VALUE” up/down keys on the right side to change the values.
DIS 8 Accessories All outputs are Active Low (DIS 8 supplies ground) Limited to 5 amp maximum. Window RPM switch Output- This output is set with the handheld controller, in the RPM window HI and the RPM window LO. At the Window RPM LO set point the DIS 8 will ground the RED wire pin “A” on the Accessories Harness at the set RPM activating an electrical device. On the Window RPM HI set point the DIS8 will deactivate the ground, turning off the device activated with the RPM LO setting.
DIS 8 MAP Sensor Input The Optional MAP sensor circuit retards the timing as a function of the boost pressure. Mode “Boost Deg/PSI” sets the number of degrees retard per pound of boost. The reference level for the boost retard system is set by reading the MAP sensor after keyon, but before the engine starts cranking. To ensure a stable reference, turn the key on until the control display light up, and then start the engine.
DIS 8 Harness Schematic Overview 21
DIS 8 Handheld Controller Menu Flow Flowchart HANDHELD CONTROLLER 1 NUMBER OF CYLINDERS 2 2 BAR SENSOR 3 3 BAR SENSOR 4 CRANK/CAM 5 8 CHANNEL 6 MAP SENSOR TRIGGER MODE 7 IGNITION TYPE COIL PER CYLINDER 8 WASTE SPARK FIRING ORDER FORD WINDSOR STD CHEVY RPM MAIN LIMIT CHEVY 4/7 SWAP AUXILIARY RPM LIMIT FORD HIGH SPEED RETARD #1 SEQUENCE HIGH SPEED RETARD #2 GM V-6 START RETARD STD 4 CYLINDER WINDOW RPM SWITCH LO CUSTOM WINDOW RPM SWITCH HI CUSTOM SET RPM SWITCH #2 RPM SWITCH #3 BOOST R
DIS 8 Trouble Shooting No Spark 8 Channel Mode: Note: DO NOT Probe the Coil Output Harness. High voltage may cause INJURY. If you need to check the Coil Output Harness, unplug it from the DIS 8.
DIS 8 No Spark Cam/Crank Mode: Note: DO NOT Probe the Coil Output Harness. High voltage may cause INJURY. If you need to check the Coil Output Harness, unplug it from the DIS 8. No Spark At Coil Wire Does it have Power? Check Power on Pin"A" on the 4 pin Power Connector Check Power/Ground Supply NO YES Check for 12 volts at pin "E" & "F" on the coil Input Harness Is there 12 volt Power? Unplug the Coil Output Harness. Check for continuitiy from the Coil Output Harness to the Coils.
DIS 8 Caution/Warnings Do Not touch output/primary coil wires with key ON or while the engine is running. (Primary and Secondary outputs contain High Voltage that can be lethal or can cause severe injuries) Do Not attempt to weld on vehicle with Ignition box still hooked up. Do Not leave ignition key on or attempt to crank starter while charging battery; we prefer that the battery is disconnected while being charged.
