Lowering Springs

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Lowering your 1200 by use of custom springs is the most elegant method. Full control over rate and length.

Overview

Many spring companies will make springs for the Datsun 1200 on request.

King Springs is one of the few companies that still list 1200 springs in their catalog. "Custom-designed coil springs can be made to order in most cases within 2 weeks."

King "low" spring versus 1200 springs

Front

Standard Front Spring Specification
110 mm: coil outer diameter
100 mm: coil inside diameter
338mm +- 10: Free length
90 lb/in: Spring constant (including ute)

General recommendations:
Comfort: stock rate (90 lb/in)
Competition: 110 lb/in with stiff anti-roll bar
spirited street: 125 lb/in with upgraded anti-roll bar
street/race: 175 lb/in with stock anti-roll bar
banzai: 225 lb/in with no anti-roll bar
dedicated high-speed smooth-tarmac racing: 275 lb/in

Nissan Competition Springs

The Nissan Competition springs (PN 54010-H1070) are 110 lb/in rated and lower the front of the 1200 about two inches (see Front Suspension Specification). A 1/2 thick bump rubber stop must be installed on the shock rod. These can be made by cutting down the stock rubber bumpers.

Measuring

Free Length: with coil out of car
Static Length: With car at standard height
Trapped Length: With car jacked up & suspension allowed to fully drop

King Springs

King lists these for 1200:
* KDFL-17 Front STD
* KDFL-57 Front Low

King's "Front Low" springs lowers vehicle approximately 30mm below standard.

KDFL-17
* 1970-1979 Datsun 1200/120Y Front STD (including ute)
* 1990-1992 Toyota MR2 ZZW30R Rear Low
* 1978-1981 Datsun Stanza Front Low
* 1979-1982 Datsun Sunny Front Low

Rear

King Springs

1200 Coupe: Low DAT-501R 
* U-bolt fitting kit PRO/UB-01 required

JC Whitney

JC Whitney sell the "DIRECT FIT LEAF SPRING" by "JOHN R SPRING" for $58 USD.