More than 240ℓ/h(3kg/㎠ fuel pressure)
TOMEI FUEL PUMP 255ℓ/h(3kg/㎠ fuel pressure)
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.
The air cleaner/filter should be upgraded to suit the power output of the engine.
Upgrading the suction pipe significantly improves air flow efficiency compared to the stock
suction pipe which can sometimes warp during high boost. However, using a straight type
suction pipe while retaining the MAF sensor may cause rough idling and/or more frequent stalling.
In general, pressurized air from the turbo is compressed and forced into the engine. However, the
air from the has low oxygen content (low density) as the air is hot and expanded. This has an
adverse effect on combustion efficiency and subsequently on performance. By installing an
intercooler between the turbo and the engine, it allows the compressed air to be cooled before it
enters the combustion chamber. This results in improved engine performance as the colder
denser air improves combustion efficiency. The Hyundai GENESIS has a notoriously small
intercooler and is particularly susceptible to high intake temperatures.
BLOW-OFF VALVE
(RECIRCULATION VALVE)
When the throttle closes, the pressurized air from the turbo has no where to go and is
forced back towards the turbo. This puts significant stress on the compressor wheel and in
some instances can be enough to stall it all together. To prevent this, a blow-off valve is
installed between the turbo and throttle to recirculate the air to between the MAF and turbo.
However, using a stock blow off valve for high boost setups will cause it to relief the
boost prematurely, resulting in reduced response and power. Therefore it is highly recommended
that you upgrade the blow-off valve to a high performance unit. It should be noted that whilst both
vent-to-atmosphere type and recirculation type blow-off valve setups serve the same function
of relieving boost, the former will often cause the MAF to give false readings. For this reason
it is recommended that you recirculate the excess boost.
With the increased exhaust pressure from upgrading the camshafts, a high flow exhaust manifold
is needed to efficiently route the exhaust gases to the turbine wheel. This helps improve turbo
spool and performance.
EXHAUST MANIFOLD
STD
Stock
TUNED
High flow, high efficiency type
TUNED
Straight type
STD
INTERCOOLER
STD
Something better than bolt-on upgrade
TUNED
High capacity, high efficiency type
STD
High performance type (vent to atmosphere)
TUNED
TUNED
AIR CLEANER
STD
High-flow type
TUNED
CATEGORY
RECOMMENDATION
FUEL PUMP CAPACITY
STD
MAF
Either with or without stock MAF
TUNED
SUCTION PIPE
STD
Stock or bolt-on upgrade
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