Tomei Powered ARMS M8265 Single Scroll - Manual (Page 19)

At 1.6㎏/cm2 (22.8psi) of boost, the ARMS M7760 is capable of 380PS, the M7960 is capable of 400PS and
the M8265, the largest one is capable of 450PS. The stock engine first weak point is the head gasket.
So at the very least, the upgrade of the head gasket to the metal type is highly recommend. So with the
upgrade of the head gasket to the metal type, and the rest of the engine remains stock. The limit then
will be 350PS with either the M7760 or M7960. The above figures is with 1.4∼1.5㎏/cm2 (19.9~21.3psi) of
boost. When Forged Pistons and H-Beam Connecting rods, you can then run up to 1.6㎏/cm2 (22.8psi) of
boost. But again that depends on the cars setup and condition. Boost should only be set when in 4th or
5th gear. As when it is changed whilst in lower gear, the higher load in lower gear will result in the wrong
boost settings. (It’s not unusual to see on some occasions when the rpm reaches its peak and the
boost drops).
The actuator has been pre-set at our factory, so there is no need for any additional adjustments.
But it is best to have a boost controller installed to make the required adjustments on the day when driving
conditions demand certain performance conditions.
Not Required
ACTUATOR SETTINGS
STOCK ENGINE
2.2L, 2.5L Base
Using a Boost Controller @ BOOST SETTINGS
Engine Tuning with a
M7760
STOCK ENGINE
2.2L, 2.5L Base
M7960 1.4∼1.5㎏/cm²(19.9∼21.3psi) 1.6㎏/cm² (22.8psi)
Using a Boost Controller @
M8265
Engine Tuning with a
M7760
M7960
{The pre-set pressure is 0.9㎏/cm² (12.8psi)}
Engine Tuning with a
STOCK ENGINE
2.2L, 2.5L Base
{The pre-set pressure is
0.9㎏/cm² (12.8psi)}
M8265
Not Required
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M7760 With the stock motor, the head gasket is the weakest point. So by upgrading the head gasket to
M7960 a metal type, with {boost settings @ 1.4∼1.5㎏/cm2 (19.9∼21.3psi)} 350PS is then the standard
limit of the normal engine. When the boost setting target is 1.6㎏/cm², we then highly recommend
to upgrade the pistons to Forged Pistons.
M8265 The larger Turbos are designed to suit those who are running larger displacement EJ engines of
2.2L and higher. Since these larger engines demand more from the Turbos, as they have more
potential. The larger Turbos are best suited for them.
The stock camshafts are inadequate to obtain sufficient exhaust pressure when using larger Turbos.
So camshafts become a vital part of the engine tuning process. It helps change the engines characteristics
to help utilize the larger Turbos potential.
2.2L, 2.5L Base
TARGET POWER M7760 350PS 380PS
M7960 350PS 400PS
M8265 450PS
CAMSHAFT
Engine Tuning with a
M7760
TOMEI PONCAM or Similar
M7960
M8265
TOMEI PONCAM or Similar
STOCK ENGINE
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