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[Datsun 1200 encyclopedia]

Flywheel

(Difference between revisions)

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Categories: Clutch | Engine Mechanical

Revision as of 18:52, 7 August 2011
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clutch face to inner face depth: 17mm clutch face to inner face depth: 17mm
-[http://datsun1200.com/modules/myalbum/photo.php?lid=11151 +[http://datsun1200.com/modules/myalbum/photo.php?lid=11151 http://datsun1200.com/uploads/thumbs/11151.jpg]
-http://datsun1200.com/uploads/photos/11151.jpg]+
= Lightening = = Lightening =

Revision as of 18:53, 7 August 2011

Datsun 1200 uses a traditional type of flywheel at the back of the engine. The face matches the Clutch while a ring gear is attached to the perimeter for the Starting Motor to turn the engine. It uses a 271mm (10.7 inch) flywheel with a 105-tooth ring gear.

Contents

Overview

All flywheels for A-series engines interchange -- for rear-wheel drive vehicles. The A12 flywheel weighs 2.2 lbs (1 kg) less is the main difference. The A12 flywheel is also thinner.

  • A12 12310-H1000: 9.7 kg (21.0 pounds as measured)
  • A12 12310-H2310: 6.4 kg (14.1 pounds) GX, also sold as 'Race Option'
  • A14 12310-H7200: 10.7 kg (22.3 lbs)


A14/A15 flywheel is thicker than the A10/A12 flywheel. When fitting the thinner flywheel to A14, remove the Engine Plate to compensate.

  • A12: 28 mm thick
  • A14: 30 mm thick

In 1974 flywheel bolts changed from British Threads to Metric threads. So the bolts are not interchangeable from early to late. See Crankshaft for details.

A12 Flywheel Measurements:

thickness: 28mm
ring gear + backing: 20mm
back rim to flywheel face depth: 5mm
clutch face to inner face depth: 17mm

11151.jpg

Lightening

For race cars, a light flywheel allows the engine to rev faster according to this principle:

The more weight, the more time it takes to accelerate


Now a street car wants a heavier flywheel, so that it will:

  • smooth out the combustion pulses
  • smooth out the drivetrain


These are the factory specs for flywheel weight reduction:

3913.jpg 1014.jpg


Finished wheight is about 6.5 kgs --a total of 2 kgs removal


Reference: Datsun B110 Competition Tune-Up Manual, Nissan Motor Co. Ltd., Tokyo Japan 1974

Part Numbers

  • 12310-18001 ASS'Y-FLYWHEEL B10
  • 12310-18002 ASS'Y-FLYWHEEL B10 (from E/# A10-87871)
  • 12310-H1000 FLYWHEEL ASS'Y A12, A12S, A12A, A13S
  • 12310-H6200 ASSY-FLYWHEEL A13
  • 12310-H7200 FLYWHEEL ASS'Y A14 -7909
  • 12310-H7201 FLYWHEEL ASS'Y A14 7910-8010
  • 12310-H8900 FLYWHEEL ASS'Y V A14S, A15 8011-
  • 12310-H8910 FLYWHEEL ASS'Y A14S, A15 8011-
  • 12315-18001 BOLT-flywheel & drive plate (from E/# 87871) (6) B10
    • 12314-18002 WASHER-flywheel
    • replaced 12315-18000 BOLT-flywheel & drive plate (6) B10
      • 12314-18001 WASHER-flywheel
  • 12315-H1001 BOLT-flywheel (6, 3/8") B110 -1973
  • 12315-H6200 BOLT-FLYWHEEL (6, 10mm) 1974-
  • 12313-10600 DOWEL (3) all A-series A10-A15
  • 12312-18000 GEAR-ring, flywheel A10/A12/A14
  • 12312-18010 GEAR-ring, flywheel A14S 8110-
  • 32202-18000 BUSHING-pilot all A-series A10/A12/A13/A14/A15/A12A


The flywheel "Assembly" includes these parts:
* 12312 GEAR-ring, flywheel
* 12313 DOWEL-flywheel



Photo Index

501.jpg 1268.jpg 1481.jpg 2513.jpg 3923.jpg 4890.jpg 5326.jpg 5428.jpg 6110.jpg 6208.jpg 6209.jpg 7979.jpg 10428.jpg 11108.jpg