2008 JDM Subaru Impreza S-GT

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2008 JDM Subaru Impreza S-GT
2008 JDM
SUBARU
IMPREZA S-GT
8/3/2015
Modification Scheme for 400+WHP on a
built engine
2008 JDM Subaru Impreza S-GT
2008 JDM Subaru Impreza S-GT
M O D I F I C AT I O N S C H E M E F O R 4 0 0 + W H P O N A B U I LT E N G I N E
Gauges
Innovate MTX-L Wideband Air/Fuel Ratio Gauge
MTX-D: Oil Pressure & Temperature
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2008 JDM Subaru Impreza S-GT
MTX-D: Exhaust Gas Temperature (EGT)
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2008 JDM Subaru Impreza S-GT
Fuel System
ID850 - Nominal Flow Rate - 885cc/min
Perrin Top Feed Fuel Rail Kit
DeatschWerks DW65c Series Fuel Pump - DET 9-652-1008
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2008 JDM Subaru Impreza S-GT
Aeromotive 13109
A1000-6 Injected Fuel Pressue Regulator
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2008 JDM Subaru Impreza S-GT
Boost System
Steamspeed/KAMAK Turbo - Preferred
Model: STEAM STX 67+ 10 CM² JDM STI TWIN SCROLL
Specifications
 Horsepower: 510CHP
 Journal Thrust Bearing CHRA
 Compressor: 67.4mm/49.7mm Garrett GTX2867R Style Aero 11-blade wheels custom
made from billet 7075 Aluminum
 Compressor flow: 51lbs per min
 Turbine: 9-blade TD06SL2 54.1mm/61mm Low Inertia wheel
 TD06SL2 Turbine Housing
 Billet Adjustable Wastegate
 Site: http://steamturbochargers.com/index.php/turbochargers/steam-turbos/wrx-sti-twinscroll/steam-stx-67plus-for-subaru-wrx-sti-10cm.html
 Blog: http://blog.steamspeed.com/2015/05/19/introducing-the-steam-stx-67-plus-for-subaruwrxsti/
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2008 JDM Subaru Impreza S-GT
Model: STEAM STX 71 10 CM² JDM STI TWIN SCROLL
Specifications
 Horsepower: 600CHP (~500+whp due to the TD06SL2 turbine housing)
 Journal Thrust Bearing CHRA
 Compressor: 71.4mm/54.1mm Garrett GTX3071R Style Aero 11-blade wheels custom
made from billet 7075 Aluminum
 Compressor flow: 60lbs per min
 Turbine: 9-blade TD06SL2 54.1mm/61mm Low Inertia wheel
 TD06SL2 Turbine Housing
 Billet Adjustable Wastegate
 Site: http://steamturbochargers.com/index.php/turbochargers/steam-turbos/wrx-sti-twinscroll/steam-stx-71-for-subaru-wrx-sti-10-cm-twin-scroll.html
 Blog: http://blog.steamspeed.com/2015/06/11/steam-stx-71-sti-spec-c-twin-scroll-edtion/
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2008 JDM Subaru Impreza S-GT
Blouch Turbo
Model: Blouch Subaru WRX/STi Dominator 1.5XT-R Twinscroll Turbocharger
Specs
 Horsepower: 470CHP
 Garrett Ball bearing CHRA
 71mm XT Compressor wheel
 56.5mm Turbine Wheel
 47lbs per min
 BPT Twin Scroll Turbine housing
 http://www.bptstore.com/Subaru-WRXSTi-Dominator-15XT-R-TwinscrollTurbocharger_p_130.html
Model: Blouch Subaru WRX/STi Dominator 3.0XT-R Twinscroll Turbocharger
Specs
 Horsepower: 550CHP
 Garrett Ball bearing CHRA
 76mm XT Compressor wheel
 60mmTurbine Wheel
 55lbs per min
 BPT Twin Scroll Turbine housing
 http://www.bptstore.com/Subaru-WRXSTi-Dominator-30XT-R-TwinscrollTurbocharger_p_135.html
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2008 JDM Subaru Impreza S-GT
Boost Control
GrimmSpeed 3 Port Boost Control Solenoid
BOV
TIAL QR 50MM BOV
MAP Sensor
Omni Power 3Bar MAP Sensor
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2008 JDM Subaru Impreza S-GT
TMIC
Process West Top Mount Intercooler Subaru WRX 2008-2014
FMIC
Perrin Subaru 2008-2013 WRX FMIC
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2008 JDM Subaru Impreza S-GT
Intake
Perrin CAI 2008-2013
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2008 JDM Subaru Impreza S-GT
Turbo Inlet Hose
Perrin Turbo Inlet Hose
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2008 JDM Subaru Impreza S-GT
Headers
Tomei Twin Spool Exhaust Manifold For JDM STI
Info: http://www.tomeiusa.com/_2003web-catalogue/000_expreme/expreme_gd-gr-gv_exmani-e.html
A better alternative: http://rogerclarkmotorsport.co.uk/store/product/170-rcm-twin-scroll-stainlesssteel-tubular-exhaust-manifold
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2008 JDM Subaru Impreza S-GT
Turbo Outlet for DP
AVO Impreza Twinscroll Cast Turbo Outlet [VF36-37]
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2008 JDM Subaru Impreza S-GT
Miscellaneous
GrimmSpeed Air/Oil Separator
Aquamist HFS-3 Water/Alcohol Injection System
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2008 JDM Subaru Impreza S-GT
Kelford Cams
220-B CAMSHAFT SET
Manufacturer Kelford Camtech
264/260 degree 10.7mm/10.20mm Lift. Stage 1 camshaft for fast street or rally application.
Suits up to 30lb boost and 8000 RPM with our recommended valve spring
220-C CAMSHAFT SET FOR 450-650CHP RANGE
Manufacturer Kelford Camtech
272/268 Degree, 11.30/10.50mm Lift. High lift 272 degree racing camshafts.
Requires cylinder head modification to fit
Must have shimless buckets.
KVS1847-BT VALVE SPRING & TI RETAINER SET
SUBARU EJ20/25 2000- Current. Ovate wire, PACALOY Beehive valve spring set with Titanium retainers. Nano-peen and
gold nitride surface finishing treatments for superior endurance. High frequency, increased seat pressure, low open pressure.
Designed specifically for the Subaru flat four. 105lb seat pressure at 36.00mm installed height. Coil bind is at 23.00mm.
12.00mm maximum lift.
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2008 JDM Subaru Impreza S-GT
GSC Power-Division Billet S1 camshafts for the 2008+ STI EJ257B with Dual AVCS.
Good for stock turbo or up to 500WHP (GT35R) upgrades.
Upgraded valve springs are required; Beehive valve springs are recommended but not required.
**Due to the lobe size, head castings will need to be filled down slightly for clearance.
*Requires upgraded valve springs*
Intake 266 / 225 @ .040" / Peak Lift 10.7MM / Centerline AVCS
Exhaust 264 / 222 @ .040" / Peak Lift 10.4mm / Centerline AVCS
GSC Power-Division Billet S2 camshafts for the 2008+ STI EJ257B with Dual AVCS.
GSC Power-Division Billet S2 camshafts for the 08+ Subaru STi EJ257 with Dual AVCS. These cams are built to suite the
higher horsepower Subies. With a power range of 500WHP and up, you need some certain mods to utilize the true potential
of the S2s. Built motor, with a built/ported head, and a good engine management system.
Upgraded valve springs are required; Beehive valve springs are recommended but not required.
**Due to the lobe size, head castings will need to be filled down slightly for clearance.
Intake 272 / 230 @ .040" / Peak Lift 10.7MM / Centerline AVCS
Exhaust 272 / 228 @ .040" / Peak Lift 10.4MM / Centerline AVCS
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2008 JDM Subaru Impreza S-GT
GSC Power-Division Beehive Spring set with Titanium Retainer for the Subaru EJ Engines
GSC Power-Division Beehive springs feature some of the most impressive manufacturing techniques in the
industry. Our beehive spring uses an ovate wire which utilizes advanced material heat treatment methods for
superior load loss capabilities. What this means to you is our spring has the highest level of spring load retention
while still maintaining good fatigue threw out the life of the spring. Only the best materials go into the GSC
Power-Division Beehive valve spring. Each batch is scrutinized for tensile strength properties, ductility, inclusion
content, and fatigue toughness.
The beehive valve spring shape has become the buzz lately. Some have inquired as to the benefits of a beehive
spring vs the dual springs that are sold by others. While some might find that the beehive spring design is new it
has been used commonly in many OE engines as well as in all of the NASCAR and F1 engines of today. Why?
The beehive shape is more stable than standard single or dual cylindrical springs. The beehive design which
incorporates an ovate wire is more than capable of the performance demands that were previously only matched
by a Dual Springs. With the smaller and lighter retainer used on the beehive valve spring allow for higher RPM
and more valve control. So beehive valve springs, with there lighter weight retainers allow for engine's to rev
quicker and maintain a more stable valve motion than the traditional cylindrical springs of yesteryear.
Beehive Spring Benefits:
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Rev faster
Lighter components
More durable design
Less stress on valvetrain components
Lower spring frequency for more precise valve control.
More valve control equals more aggressive cam profiles
Nano peened for faster break in and less stressed springs
All of these items help to return more power for you to enjoy!
The GSC 5043 Beehive valve spring set, and Grade 5 Titanium retainers. This kit is capable of 9500+ RPMS, with as much
as 11.5mm lift cams.
5043 Beehive spring pressure:
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Seat: 85 lbs @ 1.369" (34.8mm) Valve Lift
225lbs @ .433" (11mm) Valve Lift
Coil bind @ .550" (14mm) Valve Lift
5043 Beehive Rev and Boost range (using an S3 profile camshaft set)
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Max RPM: 9,500
Max boost: 35psi+
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