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Discussion Starter #1 (Edited)
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Creating the street/competition GRB....turning slowly into a race car.



Current Tune (Nov 18) 516whp(385wkw), @ 28.9psi on E73
Dyno Run (Aug 20) 480whp(358wkw), @ 28.4psi on E10 (Pump Gas)


My 2008 GRB JDM Spec R Sti



Facebook:
Smitho Racing - Home | Facebook



Youtube: Jeremy Smith - YouTube :busted:









Modification List





ENGINE MANAGEMENT




Emtron Australia KV8 MY07-14 Plugin Engine Management​
Emtron Excess Loom for extra inputs - Lambda & Oil Temp​
Emtune Logging and Motorsport Control​
Toshiba 8" Tablet for Live Data Dash and PC Logging/Tuning​
Protuned on 98 Octane/E85 Flex Fuel (E10)/(E73)​
Defi External Oil Pressure Sensor​
Defi External Fuel Pressure Sensor​
Defi External Oil Temperature Sensor​
Bosch LSU 4.9 Lambda Sensor for closed loop lambda fuel control​
HV Electronics Intake Air Temperature Sensor​
HV Electronics Flex Fuel Sensor​
EFR Turbo Speed Sensor​
Fullriver HC20 680CCA High Crank battery​
Narva Battery Isolation Switch.​
External Ignition Cut Switch​




ENGINE BLOCK



NEW Subaru Semi-closed v7 EJ207 Engine Block​
Eagle H-Beam Conrods​
JDM STI Forged Pistons ported for Oversize valves​
ACL race bearings​
New OEM 2.0L crank​
Subaru Group N Engine Mounts​
Subaru Group N Transmission Mount​
Kartboy Engine Pitch Mount​





OIL SYSTEM



12mm Oil Pump​
Black IAG Competition Air / Oil Separator​
Killer B Motorsport V2 Performance Oil Pan​
Motul 300V 15W50/20W60 Oil​
Mocal non-thermostatic Sandwich Plate​
Setrab Series 6 - 19 Row Oil Cooler​
Koyorad 15 Row Oil Cooler - Run in series​
Delete Factor Modine and Oil Cooler​
Speedflow Oil Cooler Lines and Fittings​
Custom Front Mount oil cooler brackets & ducting​





HEAD



V11 Heads with Porting​
H11mm Head Stud Kit​
Kelford 282 Race D-Shaped Cams​
Ferrea 1mm Oversize Valves​





FUEL



Bosch Motorsport 1650cc Injectors​
Denso IKH24 Spark Plugs​
AEM 320lph E85 feed Fuel Pump​
Custom external mounted Surge Tank with Dual Bosch 044 Fuel Pumps​
Aeromotive 40mm Dual Fuel Filters​
Aeromotive A1000-6 Fuel Regulator​
Speedflow fuel rails, lines and fittings​
98 Octane Fuel (93 Octane US equivalent) or up to E85​
IAG V2 Parallel Top Feed Fuel Rails - Black​





INDUCTION



Borg Warner EFR7670 Turbo 1.05 A/R T4 Twin Scroll (external WG)​
PTP T4 Lava Turbo Beanie​
Custom Exhaust Up and 3" Down pipe​
Custom Plenum Chamber for Intake Manifold​
Deleted TGV and Ported Bolt on Adaptors - Emission sensors disabled​
LINK 4 Bar MAP Sensor​
Tial 44mm MVR EWG​
Adrenalin R 3" Exhaust - Straight through piping.​
HKS Racing Suction R Intake with K&N Filter​
Custom Cold airbox for intake and oil cooler​
600x300x100mm Custom Front mount Intercooler & piping with DEI Reflect-a-gold Tape heat wrapping.​
Black Silicon Intercooler Joiners / Wurth Hose Clamps​
Koyo Racing Radiator - Dual Core​
Perrin Performance Radiator Shroud​
Rallytech UK Carbon Reverse Scoop​





DRIVE TRAIN



JDM 6 Speed Manual Transmision​
Motul Synthetic 75W90 Gear Oil​
Stock Front and Rear Differential�s​
Custom Driveshaft loops x 2​
Xtreme Clutch - Single Plate Race Ceramic Clutch (KSU24001-1R)​
Xtreme Clutch - Ultralightweight Flywheel - (FSU003CL)​
STI Brembo 4 Pot Front and 2 Pot Rear Brakes​
APR Carbon Brake Duct Plates Front​
Racetech Brake & Oil Cooler Ducts​
Girodisc 2 piece Front Rotors​
DBA T2 Street Series Slotted Rear Rotors​
Motul 600 Dot 5.1 Brake Fluid​
Endless ME22 Front Pads​
Endless MX72 Rear Pads​
New Relocated Teflon Power steering lines​





SUSPENSION / HANDLING



JDM 13:1 Steering Rack​
Sti Front Lip​
Whiteline 22mm Front and Rear Sway Bars​
Whiteline KSR207 Powersteering Bushings​
Whiteline Front Control arm - lower inner rear bushing (anti-lift/caster correction)​
Whiteline Front Roll centre/bump steer - correction kit​
Whiteline Front lower control arm brace​
Whiteline Front Strut Tower Brace​
Blitz Rear Miracle Camber Adjusters​
MCA Red Coilovers 11k Front, 12k Rear​





WHEELS / TYRES



Work Emotion 11R 18x9.5" Wheels​
Yokohama Neova AD08R 265/35R18 Tyres​
Work Emotion CR Kiwami 18x9.5” Wheels​
Hankook Z221 C70 265/35R18 Tyres​





INTERIOR



Racetech 4119WTHR Drivers Seat​
Racetech 4009WSTLH Passenger Seat​
Racetech Alloy Seat Brackets​
Octane Automotive Chromoly Multi Point (8+) Roll Cage​
Full Interior Paint in Midnight Blue​
OMP Seat Harnesses 0204​
OMP Velocita Steering Wheel, Suede, 350mm with Lifeline Quick Release & NRG Boss​
Lifeline 2.4L AFFF Handheld Fire Extinguisher.​
JDM Sti Push Button Start​
AVS A5 Car Alarm​
JDM Sti 2 Bar Boost Gauge (Metric: Bar)​
Defi Red Racer Oil Pressure Gauge (Metric: Bar)​
Bel STi Magnum Radar Detector​
GoPro 3 & 5 - Roll Cage Mount/Suction Cup​
VBOX Sport - Data Logger​
Ram Composite Twist Lock Suction Cup iPhone Mount with Universal X-Grip​
Harrys Laptimer Grand Prix Edition​
Driver Mod :tup:​





Power Journey

August 2020 - 480whp, 446wtq @ 28psi on E10 (Pump Gas)​
Update on Pump Gas Dyno - Pump Gas Dyno Update


Current Tune (Nov 18) 516whp(385wkw), @ 28.9psi on E73​
New Tune Oct 2017: 468whp, 456wtq @ 29.5psi​
Old Kelford 282's Tune: 481whp, 437wtq @29.25psi​
Kelford 272's: 494whp 446wtq @ 31.7psi​
401whp 329wtq (Limited by Tuner to be safe with Factory ECU)​
Exhaust + Air Filter + Tune: 269whp​
Stock: 227whp​
 

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9,165 Posts
Re: 2008 JDM Spec Spec R STI - Built Motor - Goal 500 whp

Nice man, good luck with the build!

I would recommend

1. Manley Turbo Tuffs rods
2. ARP Age 625 studs
3. ID1300cc injectors
4. ACT 6puck clutch
5. KillerB oil pickup, air pump delete, etc


Hopefully the shop offers a warranty on top of all that :tup:
 

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Discussion Starter #4
Re: 2008 JDM Spec R STI - Built Motor - Goal 500 whp

Current Dyno Sheet for interest - attached to the main post.
 

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Discussion Starter #6
Re: 2008 JDM Spec R STI - Built Motor - Goal 500 whp

A few parts here are really grabbing my attention :naughty:

Should be a good one to keep an eye on :eek2:


Good luck and welcome to IWSTI, OP :tup:
Thanks a lot, been on this site a lot admiring the builds on here, only just got around to making my own journal.

I want to do this properly and avoid another blown motor if possible.:D So i try and steer towards the quality parts.
 

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Discussion Starter #8
Re: 2008 JDM Spec R STI - Built Motor - Goal 500 whp

Does anyone else here have the HKS SuperTurbo Exhaust, will it be restrictive for a high power application? I have been told I will need a 3.5" Custom Exhaust to make the most power. Comments appreciated. Thanks!
 

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Discussion Starter #10
Re: 2008 JDM Spec R STI - Built Motor, Race Cam, HKS, Excedy, Motul, ACL and Eagle

Car going in for 2nd stage of build next week, will be at the tuners for 3 weeks, cant wait to see the results!
 

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Discussion Starter #12
Re: 2008 JDM 2.0L STI - Built Motor, EFR7670 on Dynapack this week!

Car goes on the Dynapack Dyno @ E&H motors at the end of the week, looking forward to see the numbers this makes! Looking for around 530hp atw, with the Exhaust and the Factory ECU being the limiting factors.

I have also installed Whiteline Front and Rear sway bars, so looking forward to the improved handling!

Big update next week!
 

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Re: 2008 JDM 2.0L STI - Built Motor, EFR7670 on Dynapack this week!

Get whiteline antilift kit and upgraded motor/tranny/pitch stop at the very least for those power levels
 

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Discussion Starter #15
Re: 2008 JDM 2.0L STI - Built Motor, EFR7670 on Dynapack this week!

Really cool power build.

530whp on... stock suspension?

:facewall:
at this stage....yes, Bad idea? Getting the power side sorted first. I've got some Second Hand Tein N1 coilovers avalible for a really good price.
 

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Discussion Starter #16
Re: 2008 JDM 2.0L STI - Built Motor, EFR7670 on Dynapack this week!

Get whiteline antilift kit and upgraded motor/tranny/pitch stop at the very least for those power levels
i will look into the anti lift kit, it has upgraded pitch stop. The engine setup was built with at least these power levels in mind, Tuning shop is copying off their Rallycross / Gymkhana car.
 

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2008 JDM 2.0L STI - Built Motor, EFR7670 on Dynapack this week!

at this stage....yes, Bad idea? Getting the power side sorted first. I've got some Second Hand Tein N1 coilovers avalible for a really good price.

You will NEED coilovers to keep your car flat at that much power, you're going to have nightmare of a body roll and lift on stock struts/springs. I had a bad time with 330whp on stock struts and yellow springs when it came to how much the car squatted.

Get something good and that you like, you'll thank yourself later on :)
 

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Discussion Starter #18
Re: 2008 JDM 2.0L STI - Built Motor, EFR7670 on Dynapack this week!

You will NEED coilovers to keep your car flat at that much power, you're going to have nightmare of a body roll and lift on stock struts/springs. I had a bad time with 330whp on stock struts and yellow springs when it came to how much the car squatted.

Get something good and that you like, you'll thank yourself later on :)
Thanks for the advice! I definitely plan to get coil-overs in the near future, just trying to space out the modifications so my bank doesn't moan!
 

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Discussion Starter #20
Re: 2008 JDM STI-Built Motor, ID2000cc, EFR7670, Race Cam, HKS, Motul, Eagle, ACL, Ex

Been a week delay on getting the car on the dyno, car confirmed on the dyno on Thursday, would rather not rush the process and get it done to the highest standard possible! Looking forward to the numbers... :D
 
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