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Trigger Wiring for Chevy V8


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I have a Distributor setup with a GM HEI 8 Pin igniter The igniter controls dwell and puts out a square wave on pin tach out. Ground - System ground or signal ground? Tach Out - to trigger1? Ignition - ignition 1? Crank Override - Connected to +5v How should i wire Trigger1 and Trigger2 ? My old injectionsystem managed to only use the Tach Out to trigger fuel and ignition without any sync signal. the VR wheel in the distributor has 8 teeths.

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