mich2112

iTrader: (9)

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

RedHardSupra

iTrader: (1)

email me the bin to marcinpohl at gmail dot com, and info about your tires, gears and trans.

joecar

The upshift speeds must always be higher than the downshift speeds at the same corresponding throttle position.

jimmyblue

iTrader: (11)

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.

mich2112

iTrader: (9)

Sent....thanks.

Mike

mich2112

iTrader: (9)

What setting(s) make the car downshift with less %tps. Stock you have to sometime floor the car for downshift, and that is not desireable.

Thanks, Mike Jones