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Old 01-25-2016, 12:32 PM   #1
AMR
Former Vendor
 
Member#: 171509
Join Date: Feb 2008
Chapter/Region: Tri-State
Location: Danbury, CT
Cool AMR Performance: 2016 Subaru STi: STOCK-vs-STAGE 1+ (AMR Cold Air Intake) Test Data

AMR PERFORMANCE BMI COLD AIR INTAKE TESTING
- 2016 SUBARU STI -


This data and testing was done to compare the factory air box "depression" / "restriction" from stock -vs- stage 1 (just tune) -vs- stage 1 plus (tune + AMR Performance BMI Cold Air Intake)








TESTING (all data in S# mode):
  • STOCK (no mods)
  • STOCK (no mods) w/ STAGE 1 TUNE
  • AMR BMI CAI w/ STAGE 1 PLUS TUNE

INTAKE DEPRESSION:
  • A restriction caused by the air filter or air intake system ducting / tubing upstream to the turbochargers compressor.


VEHICLE:
  • 2016 HyperBlue Subaru STi

VEHICLE PICTURE:









STOCK BOOST PRESSURE -vs- INTAKE DEPRESSION






GRAPH NOTES:
  • The data acquisition on the graph above shows the vehicle in stock form running the factory tune with no modifications. We did for base line data to measure the amount of "depression" / "restriction" the factory air box system has running the factory tune.





STOCK BOOST PRESSURE -vs- STAGE 1 BOOST PRESSURE -vs- INTAKE DEPRESSION






GRAPH NOTES:
  • The data acquisition in the graph above shows the STOCK BOOST PRESSURE -vs- STAGE 1 TUNE BOOST PRESSURE -vs- INTAKE DEPRESSION.
  • The STAGE 1 TUNE targes higher boost levels than the factory tune. This increase in boost pressure indicates a larger increase of intake depression. The data acquisition on the graph shows the intake system's restriction greatly increased.




STOCK BOOST PRESSURE -vs- STAGE 1 BOOST PRESSURE -vs- STAGE 1 PLUS BOOST PRESSURE -vs- INTAKE DEPRESSION






GRAPH NOTES:
  • Now we install the AMR BMI Cold Air Intake System for testing.
  • Due to the increased size of the AMR BMI Cold Air Intake (76mm) over the factory intake air box, a mass air flow (MAF) scaling is required.
  • Upon properly rescaling and leaving boost targets identical the STAGE 1 TUNE, data acquisition results on the graph shows the LARGE DECREASE in depression.
  • The decrease in depression resulted in the turbocharger's boost response coming in sooner in the RPM band as well as an increase in pressure stabilizing in the upper RPM band toward redline.
  • The intake depression at 18.4psi now shows the same restriction as the factory air box did at 15psi BUT with a DECREASE of restriction over 5500rpm by -0.10!




POWER -vs- INTAKE DEPRESSION:






GRAPH NOTES:
  • The data acquisition on the graph shows the HORSEPOWER -vs- INTAKE DEPRESSION through testing.
  • Though the STAGE 1 TUNE increase HP widely through the RPM band, it also increased the depression / restriction in the intake system.
  • The STAGE 1 PLUS TUNE w/ AMR BMI Cold Air Intake shows a large DECREASE in restriction on the intake system as well as making more power throughout the RPM band at the same boost levels as STAGE 1.



THE TOTAL RESULT GRAPH:







GRAPH NOTES:
  • The results net an increase in HORSEPOWER & TORQUE over the factory airbox while drastically decreasing intake system depression which net a increase in turbocharger response. Bringing BOOST in quicker, stabilizing boost consistency throughout the RPM band and increasing horsepower & torque in certain areas by 5-7% and others areas of the RPM band as high as 10-15%.
  • Bottom line: LESS RESTRICTION = MORE POWER!



THANK YOU FOR READING & WE HOPE THIS WAS HELPFUL


- Robert
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Last edited by AMR; 01-25-2016 at 05:51 PM.
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Old 05-20-2016, 10:04 PM   #2
skeeter281
Scooby Specialist
 
Member#: 403893
Join Date: Oct 2014
Chapter/Region: SCIC
Location: SoCal
Vehicle:
2015 STi Limited
WR Blue

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If I'm reading this right, you hit 350 tq and 300+ whp w an intake and a tune on a stock STI?
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Old 06-19-2016, 11:39 AM   #3
STi*guy.kiev
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Member#: 117854
Join Date: Jun 2006
Location: KIEV UKRAINE
Vehicle:
2003 spec c

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The stock car makes 230tg and 260whp on thier dyno.

Remember the Tune is the first and last line of defense for us car modders. I wouldn't ever mark a TUNED (this comes in many flavours) sti as STOCK.

So its more like a 45whp gain from a spicy tune coupled with awesome intake which brings alot more headroom. The stock AFR mapping is quite rich starting from the upper-midrange, leaning out the AFR and pulling a higher load gives more power. Fyi I run a 76mm intake too, and It barely touches 4.4MAFv on mild 8374EFR build @ 15psi @ 11AFR @ 12msIWP ID1000. My guess that It would support at least 22psi on my large turbo before pegging out. That said this 76mm intake might be of a compromise to any cars running strictly stage 1 or stage 2 setups. You loose resolution, and with that comes accuracy.. In my mind I always go for the smallest intake with the slighest headroom. Same for injectors, i always try maximize the pulse width without going to lower fuel pressures. This has a straight effect on performance and the physics involved. And MAP sensors without 2 or 3 atmospheres of excess sensing range going to waste leaving me with half of the resolution to work with. Yes there MUST be headroom but its best to manage it by application.

Cars flowing more air (bigger turbo +++) would start having the necessity to raise the MAF ceiling starting from around 355whp on pump gas and even more on race fuels where you run leaner AFRS and more ignition. This is when MAF cars really NEED a product like this.

Bottom line: LESS RESTRICTION = MORE POWER
GOOD PRODUCT!

Last edited by STi*guy.kiev; 06-19-2016 at 12:03 PM.
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