Tomei Powered ARMS M7960 - Manual (Page 24)

M7960
M8270
The stock Airflow diameter is too small and restrictive. So a common upgrade is the Nissan Z32
Airflow meter. With the Z32 AFM it is possible to reach 450ps. In that case, an aftermarket ECU like
the REYTEC must be used, or alternatively to go with the airflow less setup.
M7960
M8270
If you run high boost with the stock suction pipe, deformation of the pipe can occur and cause unwanted
flow restrictions. By replacing it you can gain improved air flow.
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The turbine forces compressed air through the intake which will expand with heat. When the air is hotter,
density is reduced and performance drops as combustion efficiency becomes poor. When the intercooler is
larger it will allow higher flow and improved cooling. This will allow higher density compressed air to be fed
into the engine delivering optimum combustion efficiency for best performance results.
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M8270
When the Blow Off Valve relieves pressure by venting to the atmosphere, the turbo will work the same as
the re-circulation method. But when the throttle is suddenly closed, air will still continue
to flow through the AFM which will confuse the ECU to allow more fuel to be injected into
the engine even when there is insufficient air flowing into the engine. This will cause the mixture
to run rich and cause the engine to stall. This fouls the plugs and drops engine performance.
So when using a blow off valve that re-circulates like standard, this eliminates the problem and allows
the ECU to accurately control the correct air/fuel mixture at all times.?
※ The S14/15 comes with the Re-circulation Valve for intake relief function. This is when the pressure is
higher than the supercharger, and so it acts as a safety device to allow the excess pressure to vent back
into the intake system. This usually happens when the excess pressure reaches 0.1∼ 0.4kg/cm².
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Upgrading the camshaft will improve the exhaust pressure to turn the turbine wheel more efficiently,
AIR FLOW
SUCTION PIPE High Flow Type
Z32 Genuine, or Air Flow Less Recommened: TOMEI Airflow
Conversion Kits, TOMEI Air Flow Less Intake Kit
INTERCOOLER Large Capacity and High Flow Type
BLOW OFF VALVE
Non Vent to Atmospher Types for S14/15 Recirculation Intake Relief
like Stock.
EXHAUST MANIFOLD TOMEI EXPREME Equivalent
Upgrading the camshaft will improve the exhaust pressure to turn the turbine wheel more efficiently,
however the exhaust manifold will also need to suit the new cams for optimum connditions.
A good smooth exhaust pressure flow will maximise the turbine wheels efficiency and this will deliver
a more responsive sharper boost.
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M8270
The stock outlet pipe is restrictive, and hinders the exhaust gas flow. High engine speeds and high boost
conditions will cause the boost to be unstable. This will cause performance problems with the turbo and
engine performance. By changing the size of the pipe to a larger size, this allows stable boost control and
conditions with reduced backpressure from the exhaust.
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As with the outlet, smooth air flow will improve response pickup and performance gains to suit
with the outlet pipe increased sized.
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To allow high exhaust flow efficiency whilst still being able to reduce smog emmissions.
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As with the outlet, smooth air flow will improve response pickup and performance gains.
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The Engine Management System will need to be remapped to suit the new setup.
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With increased horsepower the higher combustion temperatures will need to be adjusted to suit.
The heat value of the stock plugs will not be sufficient for the extreme conditions and can melt.
Spark plug heat value of 8's is common, but 9's is also possible depending on your setup,
please choose the right ones for your needs.
24
OUTLET PIPE TOMEI EXPREME Equivalent
FRONT PIPE
ENGINE MANAGEMENT SYSTEM
PLUGS
Recommendation: The main equivalent pipe diameter Φ80
CATALYTIC CONVERTER Recommended: Metal Sports Catalysts
To suit the cars setup requirements.
Recommended Heat Rating 8-9 - Please change to suit.
MUFFLER Recommendation: The main pipe diameter Φ80mm or equivalent