Tomei Powered ARMS M8280 - Manual (Page 27)

SPECIFICATIONS
SETUP GUIDE
The M8280 when boosted at around 1.6 kg / ㎠ (22.8psi) can deliever 450ps on 100 Octane pump
gas (As tested in Japan). Please note that the maximum output depends on the state of the car.
Have the car running in 4th or 5th gear when you're making changes to the boost setting. 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.
A significant impact on performance will show when upgrading the Camshafts, Suction Intake,
Exhaust Manifolds, Outlet Pipe, Catalyzer and Muffler System. With stock Cams, exhaust manifold,
COMPRESSOR WHEEL TURBINE WHEEL
POWER
TRIM INNER DIA. EXIT DIA. TRIM
450PS
ITEMS RECOMMENDED SETUP
BOOST SETTING
STOCK CONDITION 1.0～1.2㎏/㎠(14.2～17.1psi) On Boost Controller
TUNED ENGINE 1.6㎏/㎠(22.8psi) On Boost Controller
OUTER DIA. EXIT DIA.
60 66.0mm 84.0mm 77 67.0mm 58.8mm
ACTUATOR
STOCK CONDITION
Not Required {Pre-set at 0.9㎏/㎠ (12.8psi)}
TUNED ENGINE
TARGET POWER
STOCK CONDITION 350PS
TUNED ENGINE 450PS
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outlet, boost of 1.2 kg / ㎠ (17.1psi) can get about 350ps. If all of the above is upgraded to the TOMEI
items, with set Boost of 1.6 kg / ㎠ (22.8psi): 450ps is possible.
The stock Pistons in the 1JZ are capable to cope with up to 600ps. However, with a drop in pressure
or engine compression, this increases the unwanted stress levels in the stock Pistons. So
upgrading to Forged Pistons are highly recommended.
The stock 1JZ conrods are fine for up to 500ps, however that depends on the state of the engine
as well.
The standard camshafts cannot provide enough performance flow & pressure, so this limits your
chances of utilizing larger turbines. But once you upgrade your camshafts, you'll be able to run
larger turbines with ease.
Higher combustion pressures and boosts increase. When the 1JZ boost is set with the stock head
gasket at 1.6 kg/㎠ (22.8psi), is possible with a lower compression ratio setting. It is highly
recommended to upgrade the Head Gasket for increased sealing which will enhance performance
when running higher boost. When changing the thickness of the Head Gasket, your compression
ratio will change. TOMEI φ87.5mm bore at 1.8 mm thickness will give you a compression ratio of 8.8.
TOMEI φ87.5mm with 2.0mm thickness will give you a compression ratio of 8.6. You'll have to check
all variables, Combustion chamber volume, and block and head surface amount and so on to get the
the correct compression ratio.
PISTONS
STOCK CONDITION
STANDARD
TUNED ENGINE
CONNECTING RODS
STOCK CONDITION STANDARD
TUNED ENGINE Conrods Recommended: TOMEI H-Beam Conrod
CAMSHAFTS
STOCK CONDITION STANDARD
TUNED ENGINE TOMEI PONCAM Best Suited
HEAD GASKET
STOCK CONDITION STANDARD
TUNED ENGINE Upgrade Recommended: TOMEI METAL HEAD GASKET
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