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Home >> Chevrolet >> 1968 >> Impala Not Available, 6.5L Eng, Not Available Trans >> Repair and Diagnosis (Single Page) >> Engine Performance >> Tune-Up >> Tune-Up - V8 >> Engine Identification >> Compression Pressure
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Compression Pressure

At cranking speed with throttle wide open and all plugs removed. Maximum variation between cylinders should be 20 lbs. 

302" 190 lbs.
307" 150 lbs.
327", 210, 250, 275, 300 HP 160 lbs.
  325, 350 HP 150 lbs.
350" 150 lbs.
396" 150 lbs.
427" 385, 390, 400 HP 160 lbs.
  425, 430. 435 HP 150 lbs.