Mercury Engines (1964)

  390 V8
(250 HP)
390 V8
(266 HP)
SUPER 390 V8
(300 HP)
INTERCEPTOR 390 V8
(330 HP)
427 V8
(410 HP)
SUPER 427 V8
(425)
Displacement Cu. In. 390 390 390 390 427 427
Bore (Inches) 4.05 4.05 4.05 4.05 4.23 4.23
Stroke (inches) 3.78 3.78 3.78 3.78 3.78 3.78
Compression Ratio 9.4 9.4 10.1 10.1 11.5 11.2
Type V8-90° OHV V8-90° OHV V8-90° OHV V8-90° OHV V8-90° OHV V8-90° OHV
Carburetor 2V 2V 4V 4V 4V 8V
Firing Order 15426378 15426378 15426378 15426378 15426378 15426378
Fuel Requirements Regular Regular Premium Premium Super Premium Super Premium
Idle Speed (RPM)*
  Manual Trans. in Neutral
  Multi-Drive in Drive

575-600
475-500

575-600
475-500

575-600
475-500

575-600
550-575

700-800

700-800
Ignition Timing Advance**
    Manual Transmission
    Multi-Drive Trans.
    Minimum
    Maximum
        Manual Trans.
        Multi-Drive Trans.





11°
11°





11°
11°






11°






11°


-



-


-



-
* On air conditioned equipped cars, the engine idle speed should be set with the air conditioner turned on for a minimum of 20 minutes and the blower speed on "Hi."
The car windows should also be open
** Ignition timing requirements may vary depending upon locality, fuel, and operating conditions. In order to obtain maximum economy and performance, the timing may be advanced to a point just short of audible detonation under load but not to exceed 5° over the normal setting. This does not apply to 427 C.I.D engines.
If the use of sub-standard fuels is encountered, the initial setting may be retarded from the normal setting, However, do not retard the initial setting beyond 2° B.T.D.C.
Note: Horsepower listed is the manufacturer's dynamometer rating.

Data taken from "1964 Mercury Registered Owners Manual"


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