What do our cars consider WOT?
10-10-2008, 12:51 PM
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What do our cars consider WOT? Anything pedal to the floor or less then that? I'm trying to adjust my cruise ltft's again and my wot fueling again.
10-10-2008, 02:48 PM
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There are several thresholds that you care about.
There's one for transmission (A4) that decides to
use "WOT shifting strategy" (i.e. max(RPM, MPH)
from WOT tables rather than the MPH vs TPS part
throttle table. For fueling you need to look at PE
mode enable TPS but realize that it also needs MAP
and RPM to be satisfied, and both of these also are
related to throttle position. PE mode enable TPS is
never at 100%. I have it as low as 25% and count
on the MAP to be the real "trigger" (don't need PE
until you have so much cylinder pressure, that you
would ping at stoich). Bring spark advance down
to fight ping until you get to 25 degrees or so (w/
MAP, which is seen in dynamic cylinder air) and from
that point fight ping with fuel instead. Or 27 degrees,
whatever you like. But you don't need to be throwing
35 degrees advance and 12.5:1 at it, that's inefficient.
There's one for transmission (A4) that decides to
use "WOT shifting strategy" (i.e. max(RPM, MPH)
from WOT tables rather than the MPH vs TPS part
throttle table. For fueling you need to look at PE
mode enable TPS but realize that it also needs MAP
and RPM to be satisfied, and both of these also are
related to throttle position. PE mode enable TPS is
never at 100%. I have it as low as 25% and count
on the MAP to be the real "trigger" (don't need PE
until you have so much cylinder pressure, that you
would ping at stoich). Bring spark advance down
to fight ping until you get to 25 degrees or so (w/
MAP, which is seen in dynamic cylinder air) and from
that point fight ping with fuel instead. Or 27 degrees,
whatever you like. But you don't need to be throwing
35 degrees advance and 12.5:1 at it, that's inefficient.