Proper way to raise part throttle shift points

[Redline Motorsports]

I am trying to dial in a 2000 C5 A4 car that we just put 3.42 gears in. The guy had been complaining that the car was shifting too early at part throttle so I would like to stretch out the shift a bit.

It looks like maybe raising the D0901-D0903 MPH should make this happen but wanted to confirm that there are not other tables that tie into this.

I also notice it needs quite a bit of pedal to down shift and see that D0906 is noted as 100% TPS. I assume that lowering the TPS % will enable down shift earlier?? Sounds obvious but the tranny is as unique as the engine management!

Just looking to do it the right way.

Thanks

Howard

[SSpdDmon]

http://forum.efilive.com/showthread.php?t=3399

That's my process...

Start with stock tables. Make changes with gear calculator. Then shift part throttle tables up one row. You can try two rows, but I personally like one. Just make sure you shift all tables equally ("D0901, D0902, D0903, D0906, D0907, & D0908"). If it's stalled, then you should definitely play with the lockup. But even on stock stalled cars, I play with the apply/release speeds - especially in 4th. The best thing to do is to open both the 4th apply and 4th release windows side by side. That way you can make sure the release speed is always LOWER than the apply speed.

[joecar]

Howard,

Like SSpd said, first enter your axle rear change, before doing anything else.

Then do table row shifting like SSpd said;

you may want to keep the low TPS portions of D0901-3 the same,
unless you want it to delay upshifting at low throttle (doesn't feel right);
i.e. move up just the middle/higher TPS portions;

Then test drive it on the street, and may need to fine tune.

Keep D0960-2 and D1007-9 at 100%...

D0901-3 and D0906-8 provide all the PT speed and throttle responses
(consider this: if throttle jumps up, where does it put you on any one of D0906-8...).

Always maintain the following relationships:

D0901 > D0906
D0902 > D0907
D0903 > D0908

D0903 > D0902 > D0901
D0908 > D0907 > D0906

D1002 > D1005
D1003 > D1006

D1001 and D1004 may be set to 255 (or some high value)...
this just disables the TCC in 2nd gear, you can leave that as is.

Joe

[Redline Motorsports]

To impatient to wait for a response so I went and played with it. Already did the gear cal last night after the install.

I got it shifting pretty good by raising the mph shifts at part throttle. I raised the entire scale the same on all shifts and got it real good. I also reduced the down shift TPS % and that worked good as well.

I took joe's write up that I found the other day and got the tranny shifting firmer by playing with the shift times, torque reduction and trans pressure. Its too bad it takes so long to pull over, change and reflash to get the points right. Seems like it takes more time to make the changes then it does to know if the changes worked!

Thanks for the info!

Howard

[joecar]

Howard,

D0901-3 and D0906-8 function in 2 ways...

a. if the MPH crosses the curve, then the shift is commanded;
b. if the TPS crosses the curve, the MPH has now effectively crossed the curve also, so the shift is commanded.

Joe

[joecar]

To impatient to wait for a response so I went and played with it....

lol... that's the way to do it....

[Doc]

. Seems like it takes more time to make the changes then it does to know if the changes worked!

Howard

Time for a Road Runner

[Redline Motorsports]

Time for a Road Runner

Good point. I think its time!