C5 Auto shift points
Thread Starter
Racer
Joined: Aug 2001
Posts: 352
Likes: 0
From: San Diego CA
C5 Auto shift points
Hi all. I'm doing a driving simulator for work, and am using the C5 vette for test data. I was wondering if there is a formula that I could use to calculate the RPM's at which an automatic C5 will shift at as a function of throttle position (0-100%)? A table would work too, though it would be less convenient.
Thanks in advance for any help or pointers :)
Thanks in advance for any help or pointers :)
Le Mans Master
Joined: Nov 2000
Posts: 7,294
Likes: 1
From: Coral Springs Florida
Re: C5 Auto shift points (wlutgen)
Alot will depend on the program. With one rear end ratio vs. another..Hp/Tq..finding that sweet spot to shift at is a matter of programming. As a guide the owners manual will tell you the limits of each gear.
In my case the programming has been modified to optmize the h.p./tq and the rev limiter has been increased to maximize the powedr of the shifts. I also have a Transgo shift kit installed in my transmission which provides clean quick shifts..:D
In my case the programming has been modified to optmize the h.p./tq and the rev limiter has been increased to maximize the powedr of the shifts. I also have a Transgo shift kit installed in my transmission which provides clean quick shifts..:D
Melting Slicks
Joined: May 2001
Posts: 2,596
Likes: 120
From: East Tennessee
Re: C5 Auto shift points (wlutgen)
Here is a stock 3.15 A4 shift vs TPS table, hope it helps you out :cheers:
I guess you have to click on it to get full size..
[Modified by kp, 10:16 AM 12/14/2002]
I guess you have to click on it to get full size..
[Modified by kp, 10:16 AM 12/14/2002]
Team Owner
Joined: Sep 2000
Posts: 25,015
Likes: 2,709
From: Far NW 'burbs of Chicago
St. Jude Donor '13
Re: C5 Auto shift points (kp)
When I clicked on the link, it came up kinda fuzzy but some of the numbers didn't look right. For my 2001, A4, 3.15 axle, full throttle upshifts come at:
1-2: 45
2-3: 85
3-4: 135
Or at least, that's as close as I can read the speedo during the mad rush!
1-2: 45
2-3: 85
3-4: 135
Or at least, that's as close as I can read the speedo during the mad rush!
Melting Slicks
Joined: May 2001
Posts: 2,596
Likes: 120
From: East Tennessee
Re: C5 Auto shift points (Gearhead Jim)
it has to meet both mph and RPM for it to shift, my 1-2 is set at 42 mph but it doesnt shift until the rpm reaches 6350 (where I have it set) which is ~49mph. There is another table that shows the rpm that you adjust as well. Those are stock numbers right from a stock PCM..
Melting Slicks
Joined: Feb 2002
Posts: 2,613
Likes: 0
From: Winston Salem NC
Re: C5 Auto shift points (Gearhead Jim)
The chart kp put up is for part throttle shifts. The shifts your show are at wot and must have mph and rpm parameters met to occur, as he points out. The chart the poster would like is not possible for the reasons Manny points out. But, those shift points are fairly consistant if you have a steady foot and under similar conditions like a flat road.
Try this link, it probably is okay for your project. http://www.smokemup.com/auto_math/mph_range.php
[Modified by jfpilla, 8:31 PM 12/15/2002]
Try this link, it probably is okay for your project. http://www.smokemup.com/auto_math/mph_range.php
[Modified by jfpilla, 8:31 PM 12/15/2002]
