Quote:
Originally Posted by wparsons
Holy shit, I'm seeing ghosts! 
Has anyone done any testing to see if opening the throttle plate to 100% improves hp up top or not? I find it counter intuitive that a smaller opening would make more power high up. Down low I can believe it, but I have nothing to back that up with beyond my gut feeling. |
having the throttle plate close early, at least on an FI car where I've tested it, will cost you power. this is a common mistake made on 86's that goes something like this:
- person sees table labeled 'WOT torque threshold' that seems to read in nm.
- person says 'wow... i want more torque.. awesome!' and bump up the values without adjusting the other dependent tables
- person gets upset when they log their throttle plate angle and see it closing (usually through the midrange because they thought that taking the 'dip' out of that table would eliminate the torque dip)
basically, increasing values in WOT torque threshold causes the throttle plate to open *less*, which is counterintuitive. in order to maintain full throttle angle with a reasonable WOT torque threshold curve you also have to edit the dependent tables.
for a more detailed explanation of how this all works:
http://forums.nasioc.com/forums/show....php?t=1537010, though it doesn't apply directly to our ecu, it'll give you an idea of how the tables relate to one another.
To be more application-specific: The 'WOT Torque Threshold' value is divided by the current value in 'Accel Pedal to Desired Torque', which is then used as an input to 'Desired Torque to Throttle Opening' to resolve a desired throttle plate angle.