Tomei Powered ARMS M8265 Single Scroll - Manual (Page 21)

When running higher boost, the stock suction pipe at times can deform under high pressure conditions,
this hinders intake efficiency. With the use of a hard pipe type, it then resolves the problem and increase
performance gains. MAF remapping is necessary when the use of upgrade pipe because the
characteristic of MAF sensor may be changed by the change of suction pipe.
Pressurized air from the Turbine is compressed and sent to the engine. This process forces the air
temperature to increase with heat. So when it does, the air density drops and combustion efficiency
becomes poor, resulting to performance loss. The intercoolers job is then to extract the heat from the
forced air via the fins in the intercooler. This again helps compress the air again, and the denser colder air
will improve combustion efficiency to optimize performance.
BLOW OFF VALVE RECOMMENDED:
(Recirculation Type) Strengthened Type (The Non Vent To Atmosphere Type)
When the throttle is suddenly closed, the forced air from the Turbine will have no where to go.
TOMEI SUCTION HOSE
STOCK ENGINE
2.2L, 2.5L Base
SUCTION PIPE
Engine Tuning with a
M7760
Optional - MAF Remapping Required for upgraded pipe.
STOCK ENGINE
2.2L, 2.5L Base
M7960
M8265
REQUIRED:
INTERCOOLER
Engine Tuning with a
M7760
UPGRADE RECOMMENDED
M7960
M8265
REQUIRED Main Upgrade
Engine Tuning with a
STOCK ENGINE
2.2L, 2.5L Base
M7760
Strengthened Type(The Non Vent M8265
RECOMMENDED:
To Atmosphere Type)
M7960
21
This restricted flow places a heavy burden on the turbo and other parts. So the Blow Off Valve is fitted
somewhere between the turbo and the throttle to prevent this problem by giving an option of an escape
route to vent the excess pressure. This saves the turbo from any possible problems. The stock BOV was
never designed to handle high boost applications, so it will struggle to do it's job properly when the limits
are exceeded. This puts the turbo at risk of failure and response drops. This is why we recommend to
upgrade the BOV to a stronger type. Additionally, when the BOV is a vent to atmosphere type, this can
cause other problems with the ECU not being able to read correct air volume that is flowing into the engine.
As the volume of air still passes through the air flow meter but not all of if goes to the engine. In this case
the air to fuel mixture will be incorrect. So we recommend the recirculation type design.
When you upgrade the camshafts to optimize the exhaust pressure, getting it right will help optimize the
turbine wheel efficiency. Then you'll have to have the right exhaust manifold to optimize exhaust flow, your
turbine will benefit more which will show in a sharper boost startup. However in the case of the EJ engine,
the distant from the turbo to the exhaust port is quite far, so when the piping is made too large,
response will drop. In addition, some models may require the oil pan to be modified to allow the equal length
headers to allow fitment. In addition to this, depending on the factory setup of your model and the type of
headers that you chose to use, the turbine distance to the exhaust port may be larger. This will affect the
response. With the EXPREME exhaust manifold design the exhaust backpressure will be improved to give
you an easier and sharper turbine spool.
TOMEI EXPREME or Similar
TOMEI EXPREME or Similar
M7960
M8265
2.2L, 2.5L Base
EXHAUST MANIFOLD
Engine Tuning with a
M7760
STOCK ENGINE
21