wrx/sti short block...who's done it
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Here is somthing I posted a while ago:
Well we finally got around to posting our 20G sti/wrx dyno sheet.
The dyno runs were taken a little more than one month ago. Of course the car is running a "little" stronger now :devil:
Here is a list of the modifications done to the hybrid (Sti/WRX/20g Ver1).
Modifications
- USDM 2.5L STi Shortblock
- USDM 2.0L WRX stock Heads
- M2 Turboback Exhuast
- Helix Uppipe
- STi Injectors
- Walbro Fuel Pump
- 20G Turbo (15.5 PSI, yeah that is it)
- I-Speed ECUtek
These tests were conducted on only 15.5PSI becuse the tiny little STi injectors cannot handle any more work. FYI, the duty cycle on the injectors was about 90%.
Chris
I-Speed USA
cescamilla@i-speedusa.com
Well we finally got around to posting our 20G sti/wrx dyno sheet.
The dyno runs were taken a little more than one month ago. Of course the car is running a "little" stronger now :devil:
Here is a list of the modifications done to the hybrid (Sti/WRX/20g Ver1).
Modifications
- USDM 2.5L STi Shortblock
- USDM 2.0L WRX stock Heads
- M2 Turboback Exhuast
- Helix Uppipe
- STi Injectors
- Walbro Fuel Pump
- 20G Turbo (15.5 PSI, yeah that is it)
- I-Speed ECUtek
These tests were conducted on only 15.5PSI becuse the tiny little STi injectors cannot handle any more work. FYI, the duty cycle on the injectors was about 90%.
Chris
I-Speed USA
cescamilla@i-speedusa.com
2006 Mt Hammy Car Show Winner
iTrader: (11)
Joined: Dec 2002
Posts: 2,730
From: Danville, CA
Car Info: Black 03 WRX, White 04 E46 M3
yea as of now this is what i am planning to do to my car once once i get the money (probably in a year or two 
) Is everything bolt on though and the head doesn't need any work? Also will the redline still be the same (7k) with the stock wrx heads or will you be able to rev higher.
) Is everything bolt on though and the head doesn't need any work? Also will the redline still be the same (7k) with the stock wrx heads or will you be able to rev higher.
tk5dan-
I believe it is safe to say that the bottom/middle end can put up with a 7K redline. If you are serious about raising the redline you'll need to upgrade the head for more flow, and durability. Valve springs, retainers, Cams, and valves (maybe not the valves) will need upgrading for higher redline, and you'll definately need to use a ECUtek or something to that nature.
This swap looks most promising as the WRX STI ECU can not be modded with ECUtek at this time. I believe the ideal/dream motor would be JDM RA or Spec C heads with a USDM short block. High redline with a bad *** center/middle.
If you guys have anymore questions you should ask Chris on the specifics and for a ride as well.
you won't be disapointed.
I believe it is safe to say that the bottom/middle end can put up with a 7K redline. If you are serious about raising the redline you'll need to upgrade the head for more flow, and durability. Valve springs, retainers, Cams, and valves (maybe not the valves) will need upgrading for higher redline, and you'll definately need to use a ECUtek or something to that nature.
This swap looks most promising as the WRX STI ECU can not be modded with ECUtek at this time. I believe the ideal/dream motor would be JDM RA or Spec C heads with a USDM short block. High redline with a bad *** center/middle.
If you guys have anymore questions you should ask Chris on the specifics and for a ride as well.
you won't be disapointed.
@Stoptech
iTrader: (5)
Joined: Nov 2002
Posts: 2,416
From: San Francisco, CA
Car Info: 2002 WRX Wagon
Originally posted by GM6
I am considering the sti short block and head refresh for my o3 wrx..What a great mod to have...
I am considering the sti short block and head refresh for my o3 wrx..What a great mod to have...
Former Sponsor
iTrader: (39)
Joined: Nov 2002
Posts: 6,453
From: San Jose
Car Info: Evo X, 04 STI, 335i, Fit
Hey Tim, you can make pretty good use of a GT30R on a stock EJ20 with no internals or otherwise mate. I have attached a graph from our test car with just that. This sheet shows 3 baselines in 3rd gear (we use a 6sp and the actual numbers from 4th gear were 322whp and 283wtq I just can't find the print out)
The above was done using 91 octane and with the boost pegged at just below 18psi.
Mike
(510) 487-4447
www.mpjperformance.com
www.gb-motorsports.com
The above was done using 91 octane and with the boost pegged at just below 18psi.
Mike
(510) 487-4447
www.mpjperformance.com
www.gb-motorsports.com
Last edited by Speed Element; Dec 28, 2003 at 11:22 AM.
Pr0n King
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Joined: Nov 2002
Posts: 26,618
From: The Land of Rocks
Car Info: Turncoat Turbo
Originally posted by MPJ Performance
Hey Tim, you can make pretty good use of a GT30R on a stock EJ20 with no internals or otherwise mate. I have attached a graph from our test car with just that. This sheet shows 3 baselines in 3rd gear (we use a 6sp and the actual numbers from 4th gear were 322whp and 283wtq I just can't find the print out)
The above was done using 91 octane and with the boost pegged at just below 18psi.
Mike
(510) 487-4447
www.mpjperformance.com
www.gb-motorsports.com
Hey Tim, you can make pretty good use of a GT30R on a stock EJ20 with no internals or otherwise mate. I have attached a graph from our test car with just that. This sheet shows 3 baselines in 3rd gear (we use a 6sp and the actual numbers from 4th gear were 322whp and 283wtq I just can't find the print out)
The above was done using 91 octane and with the boost pegged at just below 18psi.
Mike
(510) 487-4447
www.mpjperformance.com
www.gb-motorsports.com
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Former Sponsor
iTrader: (39)
Joined: Nov 2002
Posts: 6,453
From: San Jose
Car Info: Evo X, 04 STI, 335i, Fit
Garrett makes the GT series turbo's, the setup we use is a GT30R cartridge built into a T3/T4 housing to our specs.
The internals seem to be holding up thus far with this kit being on the car for 7,000+ miles to date but at these levels and with us having pushed the car out about another 50whp on good gas your really playing Russian roulette with the motor.
Mike
The internals seem to be holding up thus far with this kit being on the car for 7,000+ miles to date but at these levels and with us having pushed the car out about another 50whp on good gas your really playing Russian roulette with the motor.
Mike
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