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Old 08-27-2014, 02:20 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 2004STi 335WHP/376WTQ Great VF39 power after MLT rebuild!

Shop: Motion Lab Tuning
Dyno Type: DynoCom FX5000-AWD
Temp: 90F
Boost: 22psi
Fuel: 93OCT
Target AFR: 11:1 -> 10.8:1 @ Redline
SAE Corrections: Default Corrections
Peak HP at RPM: 335whp @ 5100 RPMs
Peak Torque at RPM: 376wtq @ 4450 RPMs
Transmission: Stock 6 speed
Gear: 5th
Engine Management: Cobb AP V2B w/ Speed density
Engine/Power Modifications:

  • Freshly rebuilt VF39 turbocharger
  • ML500+ Shortblock
  • Stock heads
  • Stock TMIC
  • Stock intake
  • Agency Power Side feed fuel rail system
  • Stock injectors
  • TGV Deletes
  • 255LPH fuel pump
  • 3" Turboback exhaust


This is a 2004STi that got brought to us and had a long road to success. Brought to us on a flat bed with pretty much only a bucket of bolts to sort through we were able to sort through the issues the previous shop caused while attempted to perform the project. They had assembled the motor, but we weren't sold on their workmanship. After a lengthy talk with the customer expressing our concerns he opted to take the painful step back to square 1 and have the longblock torn back down and inspected for proper assembly. This turned out to be a great decision as we found rod bolts over torqued, low quality bearings, piston rings installed incorrectly, as well as the cylinders being ~.001" out of round to name a few. Certainly not the recipe for a proper build.

After going back through the motor and rebuilding it to our ML500+ specification with ACL race bearings we started to address some of the other issues. We ended up rebuilding the cylinder head and the turbocharger while the car was down to ensure the best reliability and results possible. All said and done we had some very surprising results out of a lil ol' VF39 turbo!

Solid green lines = ~22-23PSI high boost map, dotted blue lines = Low boost wastegate pressure map.

Final HP/TQ with AFR graph:




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 08-27-2014, 03:46 PM   #2
BroBroBroBroBro
Scooby Newbie
 
Member#: 338211
Join Date: Nov 2012
Chapter/Region: E. Canada
Location: Pemeal Bacon
Vehicle:
2011 wrx ewg
equal headers+frontmount

Default

5th gear lol
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Old 08-27-2014, 03:55 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 BroBroBroBroBro View Post
5th gear lol
Just out of curiosity, why do you find 5th gear pulls funny?

Thanks,
Alex Goodwin
AlexG@motionlabtuning.com
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Old 08-27-2014, 04:40 PM   #4
bjohnson_55
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Member#: 216580
Join Date: Jul 2009
Chapter/Region: MWSOC
Location: INDY
Default

Quote:
Originally Posted by Motion Lab Tuning View Post

Just out of curiosity, why do you find 5th gear pulls funny?

Thanks,
Alex Goodwin
AlexG@motionlabtuning.com
The same reason everyone else does. I know you'll say "but it's the closest 1:1 gear!"
Well guess what, that's bs. And there's enough data out there to prove so and allow you to open your eyes.
Also we find it funny that you tune all these small turbo cars on sd, just so you can get another $100 out of the customer. We all know theres absolutely no gain in doing so, but an unaware customer may follow along with your sales pitch. I'd be willing to bet this car also has the maf fully intact with no aftermarket iat wired in.
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Old 08-27-2014, 05:30 PM   #5
Motion Lab Tuning
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Join Date: Nov 2009
Chapter/Region: South East
Location: AEM Infinity Trained
Default

Quote:
Originally Posted by bjohnson_55 View Post
The same reason everyone else does. I know you'll say "but it's the closest 1:1 gear!"
Well guess what, that's bs. And there's enough data out there to prove so and allow you to open your eyes.
Also we find it funny that you tune all these small turbo cars on sd, just so you can get another $100 out of the customer. We all know theres absolutely no gain in doing so, but an unaware customer may follow along with your sales pitch. I'd be willing to bet this car also has the maf fully intact with no aftermarket iat wired in.
I have quite a bit to say, but since you thrive on trolling us I will simply send you a private message!

Thanks,
Alex Goodwin
AlexG@motionlabtuning.com
Motion Lab Tuning is online now   Reply With Quote
Old 08-27-2014, 05:45 PM   #6
Motion Lab Tuning
NASIOC Vendor
 
Member#: 228856
Join Date: Nov 2009
Chapter/Region: South East
Location: AEM Infinity Trained
Default

For anyone curious however, with a low inertia dyno (like our FX5000-AWD or Mustang MD-150 w/o load from the eddy brake) it is quite important to run it in a higher gear to ensure the vehicle gets loaded in a similar/identical fashion on the street as we were observing on the dyno during tuning. We do not use load from the PAU for testing currently due to the software functionality, it isn't as consistent as testing with inertia only. We have found that testing in this manner provides consistent results inline with your average DynoJet.

Thanks,
Alex Goodwin
AlexG@motionlabtuning.com
Motion Lab Tuning is online now   Reply With Quote
Old 08-27-2014, 07:26 PM   #7
lolli431
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Member#: 400120
Join Date: Aug 2014
Default

no pics of the car?
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Old 08-27-2014, 08:57 PM   #8
BroBroBroBroBro
Scooby Newbie
 
Member#: 338211
Join Date: Nov 2012
Chapter/Region: E. Canada
Location: Pemeal Bacon
Vehicle:
2011 wrx ewg
equal headers+frontmount

Default

Quote:
Originally Posted by Motion Lab Tuning View Post
Just out of curiosity, why do you find 5th gear pulls funny?

Thanks,
Alex Goodwin
AlexG@motionlabtuning.com
cause you can squeek out a bigger number
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Old 08-27-2014, 09:20 PM   #9
Motion Lab Tuning
NASIOC Vendor
 
Member#: 228856
Join Date: Nov 2009
Chapter/Region: South East
Location: AEM Infinity Trained
Default

Quote:
Originally Posted by BroBroBroBroBro View Post
cause you can squeek out a bigger number
You have that backwards actually.... lower gear ration will slow the rate of acceleration. Dynos essentially measure rate of acceleration. Our numbers would be higher with a 4th gear pull.

Thanks,
Alex Goodwin
Alexg@motionlabtuning.com
Motion Lab Tuning is online now   Reply With Quote
Old 08-27-2014, 09:47 PM   #10
Scooby921
Merci Buckets
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Member#: 88606
Join Date: Jun 2005
Chapter/Region: MWSOC
Location: Clarkston
Vehicle:
2011 GMC Sierra
'13 JCW

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Quote:
Originally Posted by BroBroBroBroBro View Post
5th gear lol
Care to post something useful or are you just trolling for a post count because you think it matters?

Quote:
Originally Posted by bjohnson_55 View Post
The same reason everyone else does. I know you'll say "but it's the closest 1:1 gear!"
Well guess what, that's bs. And there's enough data out there to prove so and allow you to open your eyes.
Also we find it funny that you tune all these small turbo cars on sd, just so you can get another $100 out of the customer. We all know theres absolutely no gain in doing so, but an unaware customer may follow along with your sales pitch. I'd be willing to bet this car also has the maf fully intact with no aftermarket iat wired in.
Interesting to see you using your profile to advertise your own tuning business without being a NASIOC vendor. How about you knock that off, and when you're done perhaps have some respect for those in the same trade. You make yourself look like an incredible douche pissing on others' threads.

Quote:
Originally Posted by BroBroBroBroBro View Post
cause you can squeek out a bigger number
I don't think you know how gear ratios work. I also don't think you know how engine load works. You can generally reach higher load regions of the various calibration tables loading up the engine in a higher gear. Tuning using WOT pulls in 3rd or 4th gear doesn't always compensate for loads you'll find at WOT in 5th or 6th climbing a hill. I don't know why someone would climb a hill at WOT in 5th or 5th when they could downshift a gear or two and be more efficient, but all kinds of people do all kinds of silly things. Quite honestly it amazes me that any tuner can feel fully confident with a tune knowing they were only given a few hours to try to work magic on something that's expected to make a ton more power AND be reliable. The OEM's spend years coming up with a reliable cal that works for everyone. We all ask these magicians to give us more power and maintain that same reliability with a few hours worth of fiddling with things.

Think before you speak or go bro trolling in a different forum so I don't have to get all surly dealing with the ignorance. Sorry, its a "get off my lawn" kind of day.
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Old 09-02-2014, 07:01 PM   #11
BroBroBroBroBro
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Member#: 338211
Join Date: Nov 2012
Chapter/Region: E. Canada
Location: Pemeal Bacon
Vehicle:
2011 wrx ewg
equal headers+frontmount

Default

Quote:
Originally Posted by Scooby921 View Post
Care to post something useful or are you just trolling for a post count because you think it matters?


Interesting to see you using your profile to advertise your own tuning business without being a NASIOC vendor. How about you knock that off, and when you're done perhaps have some respect for those in the same trade. You make yourself look like an incredible douche pissing on others' threads.


I don't think you know how gear ratios work. I also don't think you know how engine load works. You can generally reach higher load regions of the various calibration tables loading up the engine in a higher gear. Tuning using WOT pulls in 3rd or 4th gear doesn't always compensate for loads you'll find at WOT in 5th or 6th climbing a hill. I don't know why someone would climb a hill at WOT in 5th or 5th when they could downshift a gear or two and be more efficient, but all kinds of people do all kinds of silly things. Quite honestly it amazes me that any tuner can feel fully confident with a tune knowing they were only given a few hours to try to work magic on something that's expected to make a ton more power AND be reliable. The OEM's spend years coming up with a reliable cal that works for everyone. We all ask these magicians to give us more power and maintain that same reliability with a few hours worth of fiddling with things.

Think before you speak or go bro trolling in a different forum so I don't have to get all surly dealing with the ignorance. Sorry, its a "get off my lawn" kind of day.
your right I don't know what im saying I just assumed 4th yields higher numbers so 5th would be even moreso. didnty mean to troll it does sound childish and I don't know **** about cars.
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Old 09-02-2014, 08:13 PM   #12
Dr. octagon
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Join Date: Feb 2008
Chapter/Region: MAIC
Location: Union Station
Vehicle:
02 Kinugawa'ed
Rotated T67

Default

Quote:
Originally Posted by BroBroBroBroBro View Post
your right I don't know what im saying I just assumed 4th yields higher numbers so 5th would be even moreso. didnty mean to troll it does sound childish and I don't know **** about cars.
My god
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