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Old 03-23-2013, 08:09 AM   #1
nfm
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Member#: 171697
Join Date: Feb 2008
Chapter/Region: MWSOC
Location: Orland Park, IL
Vehicle:
05 WRX
0whp

Default 2.0L vf48 283whp/297wtq

Event: Road pull
Location: N/A
Ambient Temp: 38F
Elevation: 675ft
Weather: Sunny, 68% humidity
Track and Conditions: Asphalt, slightly uphill starting in middle of the pull
Tires: Nitto NT05

Car: '05 WRX
Tuner: Me
Dyno Info: Airboy
Transmission: 5spd
Gear: 3rd
Peak HP at RPM: 283 @ 5450
Peak Torque at RPM: 297 @ 4410
Baseline hp/tq for a stock on same dyno: N/A
Target Boost: 19psi, peaked 19.73psi
Target AFR: 10.94, actual were on avg 11.4
Fuel: Shell 93oct (winter blend?)
Engine/Power Modifications: VF48, STi TMIC, 565cc '11 WRX injectors, Walbro 255, TGV deletes, APS 65mm CAI, Invidia UP, Catless Helix 3" DP, A'PEXi N1 Race Catback, GM EBCS
Driveline Modifications: Stock clutch
Suspension Modifications: '04 Sti struts with JDM STi pink springs
Other Modifications: Perrin crank pulley, Nitto NT05 245/40/18 on 18.8.5 Rota SVN, Spoiler delete

Tune: 14 degrees peak torque, 22 degrees around 6.1k RPM (edit: correction, it was 20* in this pull)







More on car here: http://forums.nasioc.com/forums/show....php?t=2475010
Log: https://docs.google.com/spreadsheet/...GRSZTZzY1lVNmc

I ran out of road and stopped at 6.2k RPM. My AFRs used to be around 10.9~11.2 but recently since I cleaned my MAF and filter from oil/dirt it flows more. 11.5afrs will be too aggressive in the summer. I hit 4.6MAFv around 6k RPM, went above 3.0g/rev load, it's definitely making good power.

Kyle.
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Last edited by nfm; 03-26-2013 at 12:53 AM. Reason: added log
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Old 03-23-2013, 12:18 PM   #2
Subian
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Location: Chitcago, IL
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The 2.0L that could

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Ever tried comparing logs with Virtual dyno software?
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Old 03-23-2013, 05:46 PM   #3
nfm
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0whp

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285/299 virtual dyno:
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Old 03-23-2013, 06:17 PM   #4
BlazeRex
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Is that the final tune? 22* around 6000 is higher than I usually would go. That and fueling isn't exactly where I'd like it. But nonetheless good job on getting the numbers!
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Old 03-23-2013, 06:33 PM   #5
skatinboarding
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Is that the true afr on that vd?
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Old 03-23-2013, 06:34 PM   #6
nfm
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Quote:
Originally Posted by BlazeRex View Post
Is that the final tune? 22* around 6000 is higher than I usually would go. That and fueling isn't exactly where I'd like it. But nonetheless good job on getting the numbers!
Yeah you're right, seems like it's a bit too much timing. I will post/upload my ROM shortly. It looks like I did this pull with ECT temp of 140 and 2* advance was added in. Timing should have been around 12* peak and at most 19* toward redline after checking the map. But on the other hand, it ran 22* (correction: 20*) with 11.5afrs on winter blend? Not bad. I was wondering what kind of timing my setup can take.

Last edited by nfm; 03-23-2013 at 06:40 PM.
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Old 03-23-2013, 06:34 PM   #7
nfm
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Quote:
Originally Posted by skatinboarding View Post
Is that the true afr on that vd?
Yes true afrs logged with calibrated LC-1.
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Old 03-23-2013, 07:18 PM   #8
shano
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Right on man. Car must feel very torquey on the street eh?
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Old 03-24-2013, 11:36 PM   #9
nfm
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Quote:
Originally Posted by shano View Post
Right on man. Car must feel very torquey on the street eh?
You bet, feels pretty good. Spool is quick, feels like td04, and when comparing logs vf48 is neck and neck with td04 at least on my setup in this chilly weather when looking at RPM vs MAFv, except that it keeps going after 5.4k rpm.

Airboy suggested to have SAE off in VirtualDyno since weather/elevation information in Airboy's spreadsheet is used only for air density calculations to adjust for aero drag whereas VirtualDyno does something else. With SAE off I'm getting 298hp/313tq:

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Old 03-25-2013, 09:33 AM   #10
Subian
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I would give it some smoothing (3-5) to give you more of an accurate number.
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Old 03-25-2013, 11:10 AM   #11
LatentWagen
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Yea, definitely smooth it out. I don't know why people even bother tuning when they can just kick up the correction factor and smooth the **** out of a choppy curve.
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Old 03-25-2013, 02:22 PM   #12
ppayer38
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All I know is if that if the true AFR I don't see this car lasting long specially if the timing is even close to moderate... It's choppy and lean. You could have a much safer tune just by letting the AFR stay stead around 11-11.5
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Old 03-25-2013, 02:29 PM   #13
Airboy
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Quote:
Originally Posted by ppayer38 View Post
All I know is if that if the true AFR I don't see this car lasting long specially if the timing is even close to moderate... It's choppy and lean. You could have a much safer tune just by letting the AFR stay stead around 11-11.5
AFR is around 11-11.5
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Old 03-25-2013, 06:28 PM   #14
ppayer38
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Quote:
Originally Posted by Airboy View Post
AFR is around 11-11.5
Towards the end of that run it doesn't look like it... That is what I was referring to. Any reason you made it lean out like that?
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Old 03-25-2013, 07:59 PM   #15
skatinboarding
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Quote:
Originally Posted by ppayer38 View Post
Towards the end of that run it doesn't look like it... That is what I was referring to. Any reason you made it lean out like that?

It took me awhile to see it too. the boost numbers are on the right of the graph and the afr ratio is on the left. I was about to say something too but then noticed it.
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