Competition Oil Pump

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Nissan Competition Oil pump can in two varieties: 1)high pressure and 2) external line version.

Overview

The Nismo oil pump generates an oil pressure of over 100psi and does not self-prime. It has two gears instead of the standard pump's geroid type (trochoid pump).

Specifications
standard trochoid 19.5 litre/minute @ 4000 rpm
M0821 gear pump   26.1 litre/minute @ 4000 rpm

Instead of a rotor with lobes on it there are two gears that pump the oil. It also has oil cooler connections on the exterior of the pump.

The Oil Filter points down, exactly like the stock pump

Dry Sump Type

Part number 15010-M0821 is an A-series competition oil pump with a second stage. Looks just like any dry sump pump driven off of the camshaft. Per Nissan, the dry sump lubrication system is especially effective in long distance races.

M0821 pump

The oil filter faces UP toward the cylinder head.

Oil Pump with upright filter boss was originally designed for Cherry FF (FWD) race car
photo

Oil Cooler

 See main article: Oil Pump Coolers

High Volume Pump

Ssee Hybrid High Volume Pump
 

Part Numbers

From 1984 Nissan Competition Catalog

15010-25720 RWD & FWD Pulsar version
15010-M0820 Cherry FWD version
15010-M0821 Dry Sump version

LUBRICATION (A-SERIES)

High Pressure Pump

• 15010-25720 COMPETITION OIL PUMP Generates an oil pressure of over 100psi and does not self prime
• 15010-M0820 COMPETITION OIL PUMP (FWD) Similar to 15010-25720 except unit is designed for FWD Datsuns with A-series engines
• 11710-H5720 ALTERNATOR BRACKET For use on B210 and 210 models when installing 15010-25720 oil pump
• 15025-25720 GASKET FOR COMPETITION OIL PUMP T= 0.10mm (Yellow)
• 15025-25721 GASKET FOR COMPETITION OIL PUMP T=0.12mm (Blue)
• 15025-25722 GASKET FOR COMPETITION OIL PUMP T = 0. 1 4mm (Green)

Dry Sump Pump

From 1984 Nissan Competition Catalog

• 15010-M0821 DRY SUMP OIL PUMP Similar to 15010-25720 except has additional fittings for dry sump system
• 15025-H5720 GASKET FOR DRY SUMP OIL PUMP T = 0. 10mm (Yellow)
• 15025-H5721 GASKET FOR DRY SUMP OIL PUMP T = 0. 1 2mm (Blue)
• 15025-H5722 GASKET FOR DRY SUMP OIL PUMP T = 0. 14mm (Green)

Dry Sump Kit

From Datsun 120A Sports Option Parts model KPE10 Series (1 Nov 1974)

Dry Sump Parts

 1 15010-M0821 ASSY-PUMP Oil Dry Sump
 2 15208-H1010 ASSY-FILTER Oil
 3 08130-89010 BOLT-Hex M8x90
 4 08130-89510 BOLT-Hex M8x95
 5 08130-80010 BOLT-Hex M8x100
 6 15260-M0820 ASSY-TANK Oil Dry Sump 7 litre
 7 21305-M0820 ASSY-COOLER Oil
 8 21356-M0819 ASSY-HOSE Flexible L=320 mm
 9 21356-M0820 ASSY-HOSE Flexible L=390 mm (2)
10 21356-M0821 ASSY-HOSE Flexible L=275 mm
11 11125-14610 KIT-TANK Oil Catch 2 litre