HP Tuners - 2002 SS A4 tuning ??
#1
HP Tuners - 2002 SS A4 tuning ??
I am using HP Tuners to "enhance" the A4 in my mostly stock SS (power pulleys, Lid, smooth bellow, SLP Y and Loud Mouth). What I wanted was the car to downshift with less effort on the gas pedal, and for the shifts to be a little more crisp.
What I have happening is when the car downshifts to a lower gear, it will change back up almost immediately. This is not under WOT, maybe about 30-50% TPS (does not happen all the time). I have looked at the stickeys, and looked at other BINS on the site and I'm stumped.
I have changed the parameters in the shift speed to all .200, the TPS enable lowered to 90% and disable to 80%, and changed the values in the shift speed vs %tps vs speed table.
Does anyone have ideas?
PS - I also have a new GM reman tranny.
I can email the BIN if needed.
Thanks, Mike Jones
What I have happening is when the car downshifts to a lower gear, it will change back up almost immediately. This is not under WOT, maybe about 30-50% TPS (does not happen all the time). I have looked at the stickeys, and looked at other BINS on the site and I'm stumped.
I have changed the parameters in the shift speed to all .200, the TPS enable lowered to 90% and disable to 80%, and changed the values in the shift speed vs %tps vs speed table.
Does anyone have ideas?
PS - I also have a new GM reman tranny.
I can email the BIN if needed.
Thanks, Mike Jones
#4
Moderator
iTrader: (11)
Join Date: Mar 2002
Location: East Central Florida
Posts: 12,604
Likes: 0
Received 6 Likes
on
6 Posts
In fact you want some "hysteresis" built in, like downshift
speed should be several MPH below upshift speed. I've used
a 2MPH difference for the 1-2, 3MPH for 2-3 and 4MPH for
3-4. Try viewing the table in the "lines" mode and see how
well separated they stay, the up & down lines should never
touch or cross and upshift always higher than downshift.
Look on Horist's site for one of my later .bins and it will have
a pretty well bedded-in shift table (3.42 gears may need a
correction for yours). You would want to ignore the converter
stuff most likely and just use the part throttle shift table as
an example.
speed should be several MPH below upshift speed. I've used
a 2MPH difference for the 1-2, 3MPH for 2-3 and 4MPH for
3-4. Try viewing the table in the "lines" mode and see how
well separated they stay, the up & down lines should never
touch or cross and upshift always higher than downshift.
Look on Horist's site for one of my later .bins and it will have
a pretty well bedded-in shift table (3.42 gears may need a
correction for yours). You would want to ignore the converter
stuff most likely and just use the part throttle shift table as
an example.