The gentleman from whom I bought my engine sent me technical specs for the mysterious and marvelous DJ-code WBX. I know there's been some interest in the "secrets" (higher compression, different ECU, timing, maybe others?) behind the higher power output as it would be useful to apply them to a WBX during rebuild. As promised, I'm posting it here both for future reference and analysis. Please keep in mind these apply to DJ-code WBX running the original DJ-code harness and ECU, which is different from 2.1l MV and 1.9l DH WBX. DJ Engine - 2.1l Waterboxer - FI Technical Specifications Vehicle Identification capacity: 2109cc mumber of cylinders/type: 4/overhead valve production run: 2/1985 - 10/1992 output: 82kW - 112bhp DIN @4800 RPM torque: 174Nm - 128 lb-ft @2800 RPM bore: 94 mm stroke: 76 mm compression ratio: 10.5:1 minimum octane: 98 RON - 93 (R+M)/2 ignition type: transistorized hall effect trigger location: distributor fuel system: Bosch Digijet Injection type: multi-point fuel injection - intermittient air metering: flow Valve timing at 1mm lift in degrees inlet open: 10 BTDC inlet close: 48 ABDC exhaust open: 50 BBDC exhaust close: 0 ATDC Valve dimensions inlet diameter: 40 mm exhaust diameter: 34mm Tuning and Emission ignition coil supply voltage: 11v primary resistance: coil green label .5 - .8 ohm - coil grey label: .6 - .8 ohm secondary ressistance: coil green label 2400 - 3500 ohm - coil grey label: 6900 - 8500 ohm firing order: 1 - 4 - 3 - 2 distributor part number: Bosch 0 237 022 054 ignition timing: 10 +/- 1 BTDC @ 800 RPM without vacuum (see note) ignition advance checks: 0 - 2 @ 1050 RPM w/o vacuum and basic timing 2 - 6 @1300 RPM w/o vacuum and basic timing 12 - 16 @2400 RPM w/o vacumm and basic timing vacuum advance range: 12 - 16 engine degrees (9-11) idle speed: 800 +/- 50 RPM oil temp for CO test: 80C - 176F CO content @ idle: 2 +/- .5 % volume HC content @ idle: 300 ppm Service checks and adjustments spark plugs: Bosch W5DCO / W7CCO electrode gap: .7mm valve clearance: hydraulic compression: 11 - 14 bar (150 psi - 195 psi) oil pressure: 2 bar @ 2000 rpm @ 80C/176F Lubricants and capacities engine oil: 10w30 (sf) oil capacity with filter: 4.5 litres gearbox oil: 80W - 90W gearbox oil capacity: 3 litres (Syncro 4.5 litres) autobox oil grade: Dexron (final drive 90W) autobox oil capacity: 3 litres Notes When setting ignition timing on vehicles with DIS (digital idle stabilisation) the two connectors of the DIS unit must be removed and plugged together. Disconnect engine crankcase breather and plug on side of air cleaner. -- Chris S. Disclaimer: "Death and serious injury may occur" |
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