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Old 08-21-2014, 12:13 PM   #1
Motion Lab Tuning
NASIOC Vendor
 
Member#: 228856
Join Date: Nov 2009
Chapter/Region: South East
Location: AEM Infinity Trained
Default Motion Lab Built 2008STi 501WHP/484WTQ BPT Dom4 @ 24psi ML500+ and Kelford cam

Shop: Motion Lab Tuning
Dyno Type: DynoCom FX5000-AWD
Temp: 84F
Boost: 24psi (Blue) 18psi (Red)
Fuel: 93OCT
Target AFR: 11:1 -> 10.8:1 @ Redline
SAE Corrections: Default Corrections
Peak HP at RPM: 501whp @ 5500 RPMs
Peak Torque at RPM: 482wtq @ 5400 RPMs
Transmission: Stock 6 speed
Gear: 5th
Engine Management: Cobb AP V2B w/ Speed density
Engine/Power Modifications:

  • ML500+ shortblock assembly
  • STi 11mm Oil pump
  • Motion Lab built cylinder heads
  • Manley Performance Standard size RaceFlo valves (Intake + Exhaust)
  • Manley Performance springs w/ OE tool steel retainer
  • Kelford 220-C camshafts
  • Perrin Performance FMIC kit
  • AMR Performance big tube header and 2" up-pipe
  • Blouch Dom 4.0XT
  • TiAL Q BOV
  • Short ram intake
  • DW300 fuel pump
  • DW1000 fuel injectors
  • AEM Adjustable FPR
  • Agency Power top feed fuel rail kit
  • 3" turboback exhaust w/ AP muffler delete axle back
  • Exedy Stage1 Heavy Duty clutch kit
  • Exedy lightweight flywheel



Here is a nice build we completed a few weeks ago on a 2008STi. The customer wanted to take advantage of the Dom4 turbocharger on the car. He opted for our ML500+ shortblock rebuild package and then we went to work on the heads as well. With the flow rating on this turbo we went with the more aggressive 220-C grind which offers a 272/268 duration and hefty 11.30mm(Intake)/10.50mm(exhaust) lift. Only thing not opted for on the heads was the port work we offer!

This particular customer had bought the car 2nd hand with the current modifications, but a stock motor. Not a wise choice on the part of the first owner. After having some fun he noticed smoke out of the tail pipe and sluggish response with lack of power. Now he has everything needed to enjoy a reliable 500WHP in his 2008STi!

First trip on the dyno showed a weak fuel pump so we had to swap to a DW300 fuel pump. Now we have totally maxed out the EV14 based DW 1000CC top feed injectors, but it should be enough power to hold him over for now. The Dom4 does feel a little laggy, but it pulls quite nicely once boost has hit. We were seeing peak boost at around 4500 on lower boost and 4800 with the extra boost.


Final HP/TQ with AFR graph (Blue high boost 24psi, Red low boost 18psi):




Follow whats going on at the shop on our Facebook page Motion Lab Tuning - Automotive - Charlotte, NC | Facebook

Thanks for looking!
Alex Goodwin
AlexG@motionlabtuning.com
MotionLabTuning.com - Engineering Performance
Motion Lab on Instagram
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Old 08-21-2014, 12:16 PM   #2
toph
Scooby Specialist
 
Member#: 78640
Join Date: Jan 2005
Chapter/Region: NESIC
Vehicle:
08 STi 3.5XT-R
15 STi CWP | 02 STi Wagon

Default

Why only rev to 7,000 with the upgraded cams/valves/springs?
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Old 08-21-2014, 12:23 PM   #3
Motion Lab Tuning
NASIOC Vendor
 
Member#: 228856
Join Date: Nov 2009
Chapter/Region: South East
Location: AEM Infinity Trained
Default

Quote:
Originally Posted by toph View Post
Why only rev to 7,000 with the upgraded cams/valves/springs?
The injectors were around a ~90% duty cycle on the 1000CC injectors so we didn't have enough fuel to try and keep pushing. Power had began falling off anyways, I don't think this stock location set-up has much left in it! Something like a PTE6262 or GTX3582 w/ .82A/R would have a much different looking power band thanks to the larger turbine housing allowing the set-up to move air more efficiently with equal spool. Torque would be flatter, and power would peak later.

Great power for stock location though!

Thanks,
Alex Goodwin
AlexG@motionlabtuning.com
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Old 08-23-2014, 06:24 AM   #4
kec80
Scooby Newbie
 
Member#: 390398
Join Date: May 2014
Location: Jax. Florida
Vehicle:
2014 wrx
ice silver

Default

Wow that is impressive on 93oct and a stock location turbo.
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Old 08-25-2014, 04:58 PM   #5
tricktraxxas3
Scooby Newbie
 
Member#: 288312
Join Date: Jul 2011
Chapter/Region: MWSOC
Location: North Royalton, Ohio
Vehicle:
2007 WRX STi
WRB

Default

Why the 5th gear pull?

Sent from my SM-N900V using NASIOC mobile app
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Old 08-25-2014, 05:40 PM   #6
Motion Lab Tuning
NASIOC Vendor
 
Member#: 228856
Join Date: Nov 2009
Chapter/Region: South East
Location: AEM Infinity Trained
Default

Quote:
Originally Posted by kec80 View Post
Wow that is impressive on 93oct and a stock location turbo.
To be honest, the power looks exciting, but the lag isn't very exciting .

Quote:
Originally Posted by tricktraxxas3 View Post
Why the 5th gear pull?

Sent from my SM-N900V using NASIOC mobile app
5th gear is closest to 1:1 which is important to consider as we were testing with inertia only. Had we tested in 4th gear, power figures would have been artificially inflated by the gear ratio.

Thanks,
Alex Goodwin
AlexG@motionlabtuning.com
Motion Lab Tuning is offline   Reply With Quote
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