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HOMESERVICE MANUALSCHEVROLET1968BISCAYNE 7.0L ENG, AUTOMATIC TRANS, TRANS MFR CD POWERGLIDEREPAIR AND DIAGNOSISENGINE PERFORMANCETUNE-UPTUNE-UP - V8ENGINE IDENTIFICATIONIGNITION TIMING
1968 Chevrolet Biscayne 7.0L Eng, Automatic Trans, Trans Mfr CD Powerglide

Ignition Timing

1968 Chevrolet Biscayne 7.0L Eng, Automatic Trans, Trans Mfr CD PowerglideSECTION Ignition Timing

Set timing at idle speed with distributor vacuum line disconnected and plugged.

Engine Synchro-mesh Auto. Trans.
302" 4° BTDC  
307" 2° BTDC 2° BTDC
327" 210 HP 2° ATDC 2° BTDC
  250 HP 4° BTDC 4° BTDC
  275 HP TDC 4° BTDC
  300 HP 4° BTDC 4° BTDC
  325 HP (1)   4° BTDC.
  (2) 8° BTDC  
  350 HP (3) 4° BTDC  
350" TDC 4° BTDC
396" 325 HP 4° BTDC 4° BTDC
  350 HP TDC 4° BTDC
  375 HP 4° BTDC  
427" 385, 390, 400 HP 4° BTDC 4° BTDC
  425 HP 4° BTDC  
  430 HP 12° BTDC  
  435 HP 4° BTDC  
(1) Distributor No. 1111444.
(2) Distributor No. 1111478.
(3) Except Distributor No.'s 1111475, 477 which are set at 8° BTDC.
Fig 1: Ignition Timing Marks (All Engines)
G09362443Courtesy of GENERAL MOTORS COMPANY
RENDER: 1.0x

NO RELATED

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

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