Need info on:

Shift time (secs) vs. % tps vs. shift normal low alt
Shift time (secs) vs. % tps vs. shift normal hight alt
Shift time (secs) vs. % tps vs. shift performance low alt
Shift time (secs) vs. % tps vs. shift performance hight alt

How do these table effect the shift?

Still trying to get the tranny to shift closer to when the computer tells it to.

Thanks for any help

Brian

 

anyone?

 

Wow...looks like you have been building up your z. Hows the 396 setup? Anyways, have you checked the docs in TunerCat? It should give a general info on what the tables are for.

 

Hey Wilson,

Lost touch with you for a while. Car is still in the tuning phase, only have 350 miles on the new motor. Seems to be running good, I think the heads and intake are holding me back a little, but I’m only shooting for 12.0's on the motor so I should be able to get it there.
Tunercat info doesn't say much about those four tables, just looking for someone who has played with them to see if they have had any luck.

If you feel like chatting, drop me a e-mail and I'll get you my Cell #.

Past is past, let's not worry about it.

Brian

 

Theses parameters are not used unless you are in Performance Mode. This works the same as "Normal" mode except the PCM needs to be tripped by a momentary switch. If you look at the some of the Pontaic TransAm cars they have a little switch on the center console that lets them switch from " Normal" & "Performance". You can build you own switch circuit that triggers the PCM.

For shift points i believe you just use the Normal or Performance (if u got the switch) Up/Down Shift Points table.

For Harder/Softer shifts use the Normal/Performance Mode Pressure offset vs. %TPS

These tables control Pressure offset in either Plus or minus numbers making shift harder or softer.

 

I see what you are talking about with the difference between normal and performance tables, but do you think that by changing the times in these tables it will effect how quickly the trany completes the shift. I ask because when I do transmission data logging, there is a considerable amount of time from when the computer tells the trany to shift and when the shift actually happens. For instance, my computer says to shift to 2nd at 32 mph, and I can see this in the data logging, but it doesn't complete the shift until 41 mph. By the way, the other table in tuner cat that is governed by rpm is set to 5000rpm so that shouldn't be a factor. Just thinking that if I reduce the factory #'s of (6.3) it might make the shift happen a little closer to the actual mph set in the program.

Brian

 

If I were you I would rig up a switch to so I could toggle between "NORMAL" & "PERFORMANCE" mode. I assume your transmission shifts okay when your cruising around town. So, leave your "NORMAL" table alone. Work on the "PEFORMANCE" table. You can lower your shift points in "PERFORMANCE" mode so that you can get it to shift where you want it. Or you can try messing with the Normal/Performance Mode Pressure offset vs. %TPS to get it to shift Harder. That might fix it. But I personally would modify the "PERFORMANCE" tables for just track only use.

 

Wilson,

Thanks for the advice, I'll try that.
By the way, I have the B & M electronic shift improver that connects to the computer via two pins at the computer. It makes the car shift alot harder, but not sure it uses those tables because there set with the exact #s.

Will look into it.

Thanks
Brian

 

Dont use the B&M shift improver if your editing your tranny tables in the PCM. You'll end up killing your trans. Unplug the B&M and sell it cause the B&M unit only bumps up the line presses. Do you know where to tap into to make the tranny shift into Performance mode?

 

Here's the wiring diagram so you can access the Performance table.

Transmission Performance Switch

 

Thanks Wilson, I'll try that, still looking for some advise on how to modify the performance tables, like how much to take out or add to these tables.

Brian

 

Wilson,

I'm putting in a 96TA center console in the camaro, It already has the performance switch built in. Will that work for the performance switch hooked up the way in the directions you provided.
Also, I noticed it uses a momentary switch to turn on the performance mode, so am I to understand that you push it to turn it on, and the light will come on, and push it again to turn it off, and the light will go off. And doing this, it switches between normal & performance mode.


P.S. I have a complete gray leather interior out of my car if you know anyone interested.

Brian

 

Yes, the button works as you described. It also defaults to normal mode on the next ignition cycle if the key is turned OFF.