Leave it alone or keep tuning?
01-10-2007, 01:25 PM
#1
TECH Apprentice
Thread Starter
iTrader: (1)
Join Date: Apr 2006
Posts: 301
Likes: 0
Received 0 Likes
on
0 Posts
Leave it alone or keep tuning? My LTFT has been holding most of the time from .8 to 1.1. Think I should leave it alone or make some more adjustments to get it in the negitive?
Anything spifically to adjust to make this move the slighest bit?
Thanks
Anything spifically to adjust to make this move the slighest bit?
Thanks
01-10-2007, 01:29 PM
#2
LS1TECH Sponsor
iTrader: (4)
Join Date: Nov 2001
Location: Chicago, IL
Posts: 2,404
Likes: 0
Received 0 Likes
on
0 Posts
Move them nevative.
Gather a full log of LTFT data in the histogram in VCM Scanner with a min cell count of 100.. then multiply your VE table by % - half, then do some hand smoothing (very gentle)..
That should put you right there.
Gather a full log of LTFT data in the histogram in VCM Scanner with a min cell count of 100.. then multiply your VE table by % - half, then do some hand smoothing (very gentle)..
That should put you right there.
01-10-2007, 03:04 PM
#3
TECH Addict
iTrader: (10)
Join Date: Jun 2004
Location: Commerce Twp, MI
Posts: 2,918
Likes: 0
Received 0 Likes
on
0 Posts
If you're still in SD, then adjust the VE as Magnus mentioned.
If the MAF has been re-enabled, tweak it there. Just watch your STFT's/LTFT's averages vs. MAF Hz. You can usually see where the trouble spots are then. Make minor adjustments (1/2 corrections or less) based on the LTFT+STFT averages.
Example...
MAF Hz = 4,125
LTFT average = 1.1
STFT average = -0.2
N = 189 (make sure you have enough data)
STFT+LTFT = 0.9
Correction = multiply 4,125Hz cell by 0.9955 for 1/2 correction
(0.9% divided by 2 = 0.45% or .0045 >>> 1-.0045=.9955)
If the MAF has been re-enabled, tweak it there. Just watch your STFT's/LTFT's averages vs. MAF Hz. You can usually see where the trouble spots are then. Make minor adjustments (1/2 corrections or less) based on the LTFT+STFT averages.
Example...
MAF Hz = 4,125
LTFT average = 1.1
STFT average = -0.2
N = 189 (make sure you have enough data)
STFT+LTFT = 0.9
Correction = multiply 4,125Hz cell by 0.9955 for 1/2 correction
(0.9% divided by 2 = 0.45% or .0045 >>> 1-.0045=.9955)
