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mleblond
04-30-2009, 11:21 AM
Hi Guys,
what are you using as your base map?

I want to do the MAF calibration but I am not sure if I should do it on the stock map or the SF stage 2 FMIC 103l map.
Fobio
04-30-2009, 11:41 AM
it shouldn't matter...once you calibrate the MAF for one map, you can use the same MAF values for all the other maps.
Fobio
04-30-2009, 12:38 PM
one more thing. being in Canada, we tend to have larger swings in termperature than the US guys...so calibrating your MAF in TODAY's weather, may yield different results when summer comes around. so don't stress too much about getting to +/- 0% on your LTFT. Shoot for within +/-5%...as long as it's steady, it will be fine...and plan to re-calibrate once we get the warmer 20+ weather,
mleblond
04-30-2009, 02:09 PM
well idle is like +19% right now and WOT is +3%
Fobio
04-30-2009, 02:12 PM
I haven't calibrated mine yet, but thru-out all the testing I've done so far, I might've had 1 - 2 maps that got me into double digits ltft's...currently, running my version of a stg1+ SF 1.03r beta map...it's nice...smooth and powerful, and my ltft's are within the +/-5% @ idle and WOT without tweaking...but I will be calibrating the MAF this wknd, as it's imperative to calibrate it if you'll be tuning for power.
RX9
05-02-2009, 01:31 PM
how could you calibrate the MAF? and how can you tell the +/-%? mine runs rich, but the MAF reading is around 14.2~14.7. should i calibrate it?
Fobio
05-02-2009, 02:00 PM
how could you calibrate the MAF? and how can you tell the +/-%? mine runs rich, but the MAF reading is around 14.2~14.7. should i calibrate it?

is that your AFR or your LTFT reading?

once you calibrate your MAF (mass air flow), your LTFT's should be close to or at zero. this is not adjusting your AFR directly.
RX9
05-02-2009, 05:22 PM
is that your AFR or your LTFT reading?

once you calibrate your MAF (mass air flow), your LTFT's should be close to or at zero. this is not adjusting your AFR directly.
AFR reading. whats LTFT? i am using AP to read them.
-cj-
05-02-2009, 06:12 PM
Long term fuel trim if I'm not mistaken.

Mine move from 3 to 6 if I recall correctly... you're telling me it should be close to 0?
LBV
05-05-2009, 09:27 PM
Ideally it should be close to zero and it varies depending on what load you have on the engine - that means you'll have an LTFT # for idle, another for decel, another for cruise, and another for WOT. And as Fobio mentioned it'll vary when ambient temps stay steady.

3 -6 is nothing to worry about.