RB26 OVERSIZED OIL PUMP
The RB26DETT engine is often plagued with oil lubrication issues during circuit and drag racing events which are the main causes of most RB26 engine failures. This problem causes the main bearings to abnormally wear out from the lack of oil pressure. The stock pump is not capable of supplying the adequate amount of oil to maintain the right oil pressures at extreme engine speeds that the high powered monster RB26 performance engines require. Another weak point is that the stock pumps gear is made from weak sintered metal and this often breaks when going for bigger power and higher engine speeds and when this little piece gives out can cause an instant loss of your engine. The TOMEI RB26 oil pump has a larger pump gear made of high strength materials to supply a larger flow rate to the engine and it has an external oil pressure adjuster as well.
[RB26DETT OIL PRESSURE REFERENCE DATA]
| RPM | Oil pressure(kgf/cmg) | |
|---|---|---|
| Double spring + 2 shim (Out of the box specifications) | Double spring + 1 shim | |
| 3000 | 5.94 | 5.50 |
| 3500 | 6.10 | 5.70 |
| 4000 | 6.32 | 5.70 |
| 4500 | 6.50 | 5.90 |
| 5000 | 6.60 | 5.90 |
| 5500 | 6.60 | 6.00 |
| 6000 | 6.53 | 6.00 |
| 6500 | 6.20 | 5.80 |
| 7000 | 6.10 | 5.65 |
| 7500 | 6.00 | 5.60 |
| SPECIFICATION COMPARISON VS. STOCK |
| TOMEI | STOCK(RB26DETT) | |
|---|---|---|
| PART No. | TB203A-NS05A | - |
| MSRP | - | - |
| GEAR MATERIAL | SCM435 | SINTERED ALLOY |
| GEAR SET | 3 PIECE GEAR | 2 PIECE GEAR |
| FLOW RATE | 56.0L/6000rpm | 46.7L/6000rpm |
| OUTER GEAR DIAMETER | 97.5mm | 81.0mm |
| OUTER GEAR THICKNESS | 9.5mm | 11.0mm |
| GEAR COVER THICKNESS | 7.6mm | 6.9mm |
Tomei
TOMEI Powered är ett historiskt företag som än idag levererar det absolut bästa till bilar världen över. Det började med den professionella racingföraren Seiichi Suzuki som körde för Nissan Motor Works 1968. Han var även en fantastisk tuner och hjälpte bl.a. Nissan att ta sig långt i racingvärlden och skapade många legender. TOMEI har sedan dess varit delaktiga i serier som Touring Cars, Formula Cars, D1GP, Formula D och Time Attack. Idag erbjuder TOMEI ständigt nya innovativa produkter för att stretcha gränserna ytterligare inom motorsporten. Ur det aktuella sortimentet finner ni turboaggregat, diffar, ventilfjädrar, kamaxlar ända till kompletta race-motorer.
