Speedometer

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Speedometers were either in kilometers (JDM) or miles (USA). Australia started with mph and then switched to kph. Some speedometers had a trip meter.

Overview

Comparo

1972 USA Owners manual (see page 8,9 for Speedometer): Instrument and Controls

Variations

•  ?? 100MPH w/o tripmeter (US standard equipment)

  

•  ?? 100MPH with tripmeter

  

• 24850-H3400 1200 120MPH SPEEDOMETER Includes tripmeter

  

• Facelift GX - 180 kph

  

Part Numbers

USA

• 24850-H1816 ASSY-SPEEDOMETER 100MILE/H
• 24850-H7000 ASSY-SPEEDOMETER 100MILE/H From 7/72 [With 10 mph markings]

JDM Sunny Truck

• 24850-B8600 SPEEDOMETER ASSY -7803 [Rectangle]
• 24850-G1670 SPEEDOMETER ASSY 7804- [Round]

Metric-Imperial Conversion

Sometimes on eBay Australia you can get the vintage conversion stickers.

OR

Take the face plate and scan it on the flatbad scanner, then modify it. Finally, print a new one out with the photo printer. You can modify the font, colors, etc. Bolt it to the speedo using the standard screws.

Speedometer Calibrationon = It is normal for the speedometer to read fast. The specified tolerance is +5% -10%. So at actual 60mph it can read 57 to 66 and still be acceptable.

But you can blueprint the speedometer to be closer to the actual speed.

See Speedometer Calibration

Amplifier Speed Switch

USA model from 0772 use an amplifier speed switch for Throttle Opener system.
25035-H7000 ASSY-AMPLIFIER SPEED SWITCH

Australia models also used it, dates unknown.

68800-AM7200 speed sensor

Datsun 620 pickup USA also uses it for BCDD system:

620 clusters with Amplifier Speed Switch attached to back of speedometer

25035-H7000 ASSY-AMPLIFIER,SPEED SWITCH $69 USD
* Datsun 1200 1973 USA
* Datsun 620 1972 USA MT
25035-B6401 $88 USD
* Datsun 620 1974 USA MT
25035-B8000 $70 USD
* Datsun 620 1975-1979 USA MT

Custom Faces

See Custom Dash Faces

280Z speedometer fits:

1. Swap the mounting cups as the 280Z unit is deeper
2. Drill a hole for the trip meter shaft through the back
3. The face is to large for the opening in the 1200 housing, so carefully reduce the diameter by 1/8 inch

Speedometer Cable

See main article: Speedometer Cable

Drive Ratios

See main article: Speedometer Gears

Photo Index