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Basic 300ZX Z31 Information

Engine:
bore = 87mm; stroke = 83mm; 6 cylinder, "V" configuration
84-87 Z31 NA: VG30E, CR 9.0:1, 160hp @ 5200, 173ft-lbs @ 4300
88-89 Z31 NA: VG30E, CR 9.0:1, 165hp @ 5200, 173ft-lbs @ 4300
84-87 Z31 Turbo: VG30ET, CR 7.8:1, T3, 6.7psi, 200hp @ 5200, 227ft-lbs @ 3600
88-89 Z31 Turbo: VG30ET, CR 8.3:1, T25, 4.5psi, 205hp @ 5200, 227ft-lbs @ 3600

Turbo:
84: T3, oil lubricated, air cooled.
85-87: T3, oil lubricated, water cooled.
88-89: T25, oil lubricated, water cooled.

Firing order:
1-2-3-4-5-6

Manual Transmissions:
84-89 Z31 NA: FS5W71C: Nissan 5spd (medium)
84-86 Z31 Turbo: FS5R90A: Borg Warner T-5 5spd (weakest)
87-89 Z31 Turbo: FS5R30A: Nissan Turbo 5spd (strongest)
* These are the commonly thought of strengths based off many peoples experiences.

Automatic Transmission:
All: 4N71B: weak transmission. Level 10 makes an upgrade kit.

Trans Fluid Recommenations:
E4N71B - 7-3/8 qt - Auto Trans DEXRON
FS5W71A - 4-1/4 pt - API GL-4
FS5R90A - 4 pt - API GL-4 (SAE 80W-90) or type DEXRON
FS5R30A - 5-1/8 pt - API GL-4

Differential: - All are R200
84-87 Z31 NA: 3.7:1 - Open
88-89 Z31 NA: 3.9:1 - Open
84-86 Z31 Turbo: 3.54:1 - Open
09/86-04/87 Z31 Turbo: 3.7:1 - Open
04/87-89 Z31 Turbo: 3.7:1 - Clutch LSD
01/88-04/88 Z31 Turbo SS: 3.7:1 - Viscous LSD

Diff Fluid Recommendations:
R200 - 3-7/8 pt. (approx)
open diff: API GL-5
clutch diff: API GL-5 and SAE 80W-90 approved for Nissan LSD

Fluid Temperature Ratings:
below 50 F - 75W
below 86 F - 80W
below 104 F - 75W-90 / 80W-90
between 14 F and 86 F - 85W
between 32 F and 104 F - 90W
above 50 F - 140W
* these are ambient air temperatures

Brakes:
Year/model: Front | Rear (diameter x minimum thickness)
84-86 SF: 250 x 20 | 258 x 9
84-86 GL/GLL: 274 x 20 | 290 x 9
87-89 NA: 274 x 20 | 282 x 18
87-89 T: 280 x 24 | 282 x 18

Wheels:
year/model: diameter x width +offset : lug pattern
84-86 SF: 14 x 5.5 +??? : 4 x 114.3 (4 x 4.5)
84-85 NA: 15 x 6.5 +30 : 4 x 114.3 (4 x 4.5)
84-85 T: 15 x 6.5 +30 : 5 x 114.3 (5 x 4.5)
86 NA: 15 x 6.5 +10 : 5 x 114.3 (5 x 4.5)
84AE/86T: 16 x 7.0 +20 : 5 x 114.3 (5 x 4.5)
87-89 NA: 15 x 6.5 +20 : 5 x 114.3 (5 x 4.5)
87-89 T: 16 x 7.0 +30 : 5 x 114.3 (5 x 4.5)

Tires:
wheel size: tire size (width / ratio R diameter)
14 x 5.5: 195 / 70 R 14
15 x 6.5: 215 / 60 R 15
16 x 7.0: 225 / 50 R 16

Suspension:
Front: MacPherson Struts
Rear: Semi-Trailing arm with coil springs and tube shocks.

Anti-Sway Bars:
year/model: front | rear
84-89 NA: 22mm | 22mm
84-86 T: 22mm | 22mm
87-04/87 T: 24mm | 22mm
04/87-89 T: 24mm | 24mm
88SS: 26mm | 25mm

Information compiled from all year factory service manuals and owner manuals. Information is accurate for US/Canada models only. Other countries may have different standard features.