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08-21-2014, 12:13 PM | #1 |
Former Vendor
Member#: 228856
Join Date: Nov 2009
Chapter/Region:
South East
Location: AEM Infinity Trained
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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:
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 [email protected] MotionLabTuning.com - Engineering Performance Motion Lab on Instagram
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08-21-2014, 12:16 PM | #2 |
Scooby Specialist
Member#: 78640
Join Date: Jan 2005
Chapter/Region:
NESIC
Vehicle:19 Tundra 20 Landcruiser | 12 IS-F |
Why only rev to 7,000 with the upgraded cams/valves/springs?
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08-21-2014, 12:23 PM | #3 |
Former Vendor
Member#: 228856
Join Date: Nov 2009
Chapter/Region:
South East
Location: AEM Infinity Trained
|
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 [email protected] |
08-23-2014, 06:24 AM | #4 |
Scooby Newbie
Member#: 390398
Join Date: May 2014
Location: Jax. Florida
Vehicle:2014 wrx ice silver |
Wow that is impressive on 93oct and a stock location turbo.
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08-25-2014, 04:58 PM | #5 |
Scooby Newbie
Member#: 288312
Join Date: Jul 2011
Chapter/Region:
MWSOC
Location: North Royalton, Ohio
Vehicle:2007 WRX STi WRB |
Why the 5th gear pull?
Sent from my SM-N900V using NASIOC mobile app |
08-25-2014, 05:40 PM | #6 | |
Former Vendor
Member#: 228856
Join Date: Nov 2009
Chapter/Region:
South East
Location: AEM Infinity Trained
|
To be honest, the power looks exciting, but the lag isn't very exciting .
Quote:
Thanks, Alex Goodwin [email protected] |
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