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Old 05-04-2013, 12:25 AM   #1
Scooby Newbie
Member#: 197011
Join Date: Dec 2008
Chapter/Region: BAIC
Location: bayarea
04 Forester XT

Default FXT VF43 Tune Log and VDyno

Finally have the FXT ready to tune, Bought it bone stock a month ago from the original owner, 74k miles. Threw a VF43, 09 STi TMIC, 255lph, 3"TB, LC1 WB, stock intake. Setup on 04 STi rims, sti scoop, Swift springs.

OTS VF39 Stage 3 ACN91 map AFR is pretty rich, ~10.6 from 4.5k to redline. Slow peak to 15.5psi and ~14psi by redline. 0 knock, 18.5 max timing at redline. Im still getting used to the map names coming from tuning opensource on my Evo X.

Couple of questions: **What is the best parameter to log "knock" and how do i interpret it in terms of traditional knock sum counts? FBKC? What is an acceptable amount? Im used to sum counts and staying under a certain threshold.

Also wondering if the "primary open loop fueling" is the best map to make fuel adjustments or is there a compensation map like in OpenSource?

Here are a couple of logs and my VD graph. For some reason ATR will only let me log 6 items at once, if i choose any more than 6 the program freezes and kicks out of the ECU and then I must reconnect and change the parameters to be less than 6(+the LC1 wideband, and its not the wideband causing the issue). Anyone else have this issue?

After the initial pulls I changed the WGDC midrange because the OTS map was all over the place. Also for my "Tune#1" I leaned it out from 4.5k to redline. For "Tune#2" I will try and get the car to hit ~15psi right away ~3.2krpm, and lean the full band to around ~11.2AFR.

OTS VF39 Cobb Map logs

Tune #1 logs
Red is best run on my Tune#1 and Yellow is best run with Cobb OTS stage3.
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Last edited by imdrax; 05-04-2013 at 01:03 AM.
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