BOOST SETTING
This turbocharger is capable of making over 450ps @ 1.6kg/cm²（22.8psi）boost. However, actual results will vary depending on the condition of the vehicle. Note that boost settings should be made in 4th/5th gear. Configuring boost in lower gears will result in higher actual boost as load is significantly greater at higher gears. (You may notice that boost begins to fall as you raise the rpm beyond peak boost. This is normal)
POWER
Camshafts, turbo suction pipe, exhaust manifold, turbo outlet, catalytic converters as well as exhaust systems can all impact performance. With stock camshafts, exhaust manifold and turbo outlet around 350ps is achievable @ 1.2kg/cm²（17.1psi） boost. Upgrading all the above should make around 450ps @ 1.6kg/cm²(22.8psi) boost.
PISTONS
Stock 1JZ pistons can withstand up to around 600ps provided the engine is healthy. However, upgrading to forged pistons is highly recommended for engines with compression loss and/or other issues.
HEAD GASKET
Increasing the boost will also increase the combustion pressure. It''s possible to increase the boost up to around 1.6kg/cm²（22.8psi）even with a stock head gasket. However, lowing the compression ratio will allow you to fine tune the engine. To maintain a secure seal at high boost is it strongly recommended that you upgrade to a high performance head gasket with superior sealing. Gasket thickness should be selected based on the desired compression ratio. For reference, TOMEI φ87.5-1.8㎜＝8.8:1 CR, φ87.5-2.0㎜＝8.:1 CR6 however actual figures will depend on the amount of resurfacing/head work that has been undertaken
INJECTOR CAPACITY
Target horse power×5.9÷No. of cylinders ＝ required injector capacity per cylinder. Injectors should be operating at around 80～90% capacity to maintain good fuel atomization.
FUEL PUMP CAPACITY
Injector capacity×No. of cylinders×0.06 ＝ required fuel pump capacity Fuel pumps should be operating at around 80～90％ capacity to maintain good fuel flow
FUEL PRESSURE REGULATOR
Fuel pressure should be adjusted according to the fuel pump. Initial/atmospheric pressure should be set to 3kg/cm2.
MAF
500ps is the maximum for a stock MAF.
JZX100/JZX110/JZX110W/JZZ30Late Model/JZS171/JZS171W
Tomei
TOMEI POWERED (TOMEI MOTOR Inc.) Was founded as a company which specialized in professional racing by Seiichi Suzuki who was known as a driver for Nissan Motor Works in 1968.
From that time Seiichi Suzuki who was also and excellent tuner helped to achieve high scoring results in numerous races and made many legends.
Stories in which is still handed down as one of Japans historical race.
TOMEI have been involved in various competition levels from Touring cars to Formula Cars and the D1GP series.
From the past, present and the future, TOMEI continues to compete in motor sports and develop superior tuning products.
