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1: HELP - Corvette 85-91 Engine Tune Spec\'s - at a glance.
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  • ENGINE DECAL OR MANUFACTURER APPROVED SERVICE MANUALS OVERRIDE ALL INFORMATION LISTED BELOW

    85-91 Corvette Distributor / Timing related help at a glance.

     

  • IGNITION TIMING: 6BTDC

     

  • #1 CYLINDER LOCATION: LEFT-FRONT (68-92)

     

  • DISTRIBUTOR ROTATION: CLOCKWISE (89-92)

     

  • FIRING ORDER: 18436572 (68-92)

     

  • SPARK PLUG GAP: (our supplied US Delco Std) .035

     

  • SPARK PLUG GAP: (our supplied US Delco Rapid Fire / Platinum)..... : .045