HomeDashboardFAQSearchRiviera Questions & AnswersWrite-Ups IndexRegisterRelated LinksMemberlistLog in
Write-Up: Performance Shift Knob 5 5 1
Share | 
 

 Write-Up: Performance Shift Knob

View previous topic View next topic Go down 
Go to page : 1, 2, 3  Next
AuthorMessage
turtleman
Junkie


Name: Codith
Age: 26
Location: Villa Park, IL
Joined: 2007-02-08
Post Count: 3177
Merit: 111

PostSubject: Write-Up: Performance Shift Knob   Sat Apr 11, 2009 7:01 pm

If this is not already here somewhere, I'll be making a pretty detailed writeup on installing a regal GS or similarly functional shift knob (to be able to use the performance shift function)

http://www.rivman.com/perfshift.htm

Above is a link to Rivman aka Rob's page that basically has the fundamentals of the writeup.
Back to top Go down
turtleman
Junkie


Name: Codith
Age: 26
Location: Villa Park, IL
Joined: 2007-02-08
Post Count: 3177
Merit: 111

PostSubject: Re: Write-Up: Performance Shift Knob   Sat Apr 11, 2009 7:55 pm

This writeup may be a lot shorter than I thought. I just went out and checked my PCM harnesses. Rivman's writeup states that pin 21 on the clear connector is the one that renders perf shift on (when you ground it). On my '97 riv PCM, pin 21 is already occupied on both the clear and blue connectors. Anyone know if my year will use a different pin for that or if the PCM doesn't have any pin for it or what? The '97 GTP's had it and I can see the complete perf shift tables on my factory tune.

I had not considered that Rivman was actually using a 200X GTP PCM in his riv. Any ideas? I'm going to ask him about it next time I catch him on aim but if anyone knows what pin it would be on my PCM, post!
Back to top Go down
Rickw
Expert


Name: Rick
Age: 55
Location: Lancaster, MA
Joined: 2008-09-13
Post Count: 5961
Merit: 100

PostSubject: Re: Write-Up: Performance Shift Knob   Sat Apr 11, 2009 8:11 pm

For us dummys, could you explain what perf shift is and what it does.
Back to top Go down
turtleman
Junkie


Name: Codith
Age: 26
Location: Villa Park, IL
Joined: 2007-02-08
Post Count: 3177
Merit: 111

PostSubject: Re: Write-Up: Performance Shift Knob   Sun Apr 12, 2009 8:29 pm

Rickw wrote:
For us dummys, could you explain what perf shift is and what it does.

Performance shift or perf shift is just a funtion that most GTP's and Regal GS's have from factory that renders a more aggressive shift behavior. The button that enables it is located on the side of the shift knob used in these cars.

Physically, what this button does is short pin 21 on the clear connector of the PCM to a ground (some say with a 348ohm resistance) What that does is tell the PCM to switch to it's alternate (performance) shift tables. This funtion affects shift quickness, line pressure, shift points, etc.

There is technically nothing that this perf shift function will enable you to do, performance-wise, that you can't do with reprogramming but it does enable you to switch between two completely different transmission settings on the fly.

On factory programming, the perf shift tables aren't drastically different than the normal table but again, you can manipulate it how you wish with programming.
Back to top Go down
Rickw
Expert


Name: Rick
Age: 55
Location: Lancaster, MA
Joined: 2008-09-13
Post Count: 5961
Merit: 100

PostSubject: Re: Write-Up: Performance Shift Knob   Sun Apr 12, 2009 8:40 pm

Thanks for the explanation.
When you find out if we can utilize this with our PCM's or not, will you please post that info.
Back to top Go down
AA
Administrator


Name: Aaron
Age: 36
Location: C-bus, Ohio
Joined: 2007-01-13
Post Count: 17270
Merit: 207

PostSubject: Re: Write-Up: Performance Shift Knob   Sun Apr 12, 2009 10:21 pm

I have always thought it would be cool to wire a relay to the Trac Control button that would activate Perf Shift when TC is turned off. I know it could be done, and planned on it for a while until I got a tuner. I could then turn Perf Shift on or off by throttle application.

_________________
'98 SC Riviera • 268k miles • 298 HP/370 TQ • 0-60: 5.79s • ET: 13.97 @ 99.28 • 4087 lb • 20.1 avg MPG • Nelson Ledges Lap: 1:30
3.4" pulley • AL104 plugs • 180Ί t-stat • FWI w/K&N • 1.9:1 rockers • OR pushrods • LS6 valve springs • SLP headers • ZZP fuel rails
KYB GR2 struts • MaxAir shocks • Addco sway bars • UMI bushings • GM STB • Enkei 18" EV5s w/ Dunlop DZ101s • F-body calipers
EBC bluestuff/Hawk HP plus • SS lines • Brembo slotted discs • DHP tuned • Aeroforce • Hidden Hitch


'05 GTO • 49k miles • 0-60: 4.8s • 16.9 avg MPG
Because fun
Back to top Go down
http://www.cardomain.com/ride/657082/4
turtleman
Junkie


Name: Codith
Age: 26
Location: Villa Park, IL
Joined: 2007-02-08
Post Count: 3177
Merit: 111

PostSubject: Re: Write-Up: Performance Shift Knob   Tue Apr 14, 2009 1:59 am

ok question for DHP or Tech2 users: Can we confirm that a 97 (and other years) riviera uses the perf shift program or normal shift program?

I looked in my 1997 factory service manual and it shows that pin 21 goes to ground. If the PCM exclusively uses the perf shift tables, then it might make sense that I can cut and switch that wire to render perf shift on and off.

If this pin is actually for perfshift on a 97 riv pcm, I would take a stab and say that the 97 doesn't need the resistor(s) like some cars do, since it's already directly grounded as it is.
Back to top Go down
curious riv
Enthusiast


Name: Chris
Age: 34
Location: C'view FL
Joined: 2008-10-20
Post Count: 521
Merit: 3

PostSubject: Re: Write-Up: Performance Shift Knob   Fri May 15, 2009 3:59 pm

turtleman, any luck with this?
Back to top Go down
turtleman
Junkie


Name: Codith
Age: 26
Location: Villa Park, IL
Joined: 2007-02-08
Post Count: 3177
Merit: 111

PostSubject: Re: Write-Up: Performance Shift Knob   Fri May 15, 2009 10:00 pm

curious riv wrote:
turtleman, any luck with this?

not really

I did a crude test to figure out which shift tables my factory program uses and I'm pretty certain it's the normal tables, so that doesn't really support the theory that pin 21 on my PCM is for perfshift like all the rest. I really doubt that the relationship between the circuit status and the table used would be inverted on my PCM.

I don't really know what else to try at the moment and i'm not desperate or convinced enough to cut that wire just yet so unless I get some new information on this, the project's on hold.

Worst case, this button could be used as a factory-looking arm switch for nitrous or anything that I might need a switch for in the future.

I'm waiting to catch Rob on aim again to see if he has any further knowledge on this.
Back to top Go down
deekster_caddy
Master


Name: Derek
Age: 42
Location: Reading, MA
Joined: 2007-01-31
Post Count: 7239
Merit: 105

PostSubject: Re: Write-Up: Performance Shift Knob   Sat May 16, 2009 1:54 pm

I will add to this that a perf shift knob is really unnecessary if you have a DHP or HPTuners - just redo the shift tables so that light throttle involves stock settings and heavier throttle uses higher pressures and crisper shifts etc... and your 'perf shift' comes on when you step on the gas.

That said, supposedly the '98-'02 PCM is supposed to be capable of this mod you describe, whereas the '97 PCM might not be due to hardware limitations.
Back to top Go down
98riv
Moderator


Location: USA
Joined: 2007-01-14
Post Count: 872
Merit: 30

PostSubject: Re: Write-Up: Performance Shift Knob   Sun May 17, 2009 12:25 am

A few years ago I asked Rob the same question about adding a performance shift button to a 98riv. I can't remember his correct response, but I think he said something about you needed an aftermarket pcm (this was back before the powertuner, etc.) for the performance shift to work. Maybe someone can confirm this, but does the stock pcm file have a performance shift table? I thought it didn't, but I can't remember for sure.

_________________
1998 Supercharged Riviera - Custom CAI, Alpine spx-13ref, Infinity 6x9's, Alpine 4 Channel Amp, Kicker KX3, Silverstars, STB, Hawk Brake Pads, Monroe Air Shocks, KYB GR2
Back to top Go down
turtleman
Junkie


Name: Codith
Age: 26
Location: Villa Park, IL
Joined: 2007-02-08
Post Count: 3177
Merit: 111

PostSubject: Re: Write-Up: Performance Shift Knob   Sun May 17, 2009 1:58 pm

The stock file definitely has the perf shift tables and they are also populated with the same stuff.

Derek, I know for sure that the '97 GTP's had perfshift.
If my PCM is wired differently for some reason, I'm just gonna give it up. I would like to have a 98-99 PCM but I'm not going through that kind of hassel.
Back to top Go down
deekster_caddy
Master


Name: Derek
Age: 42
Location: Reading, MA
Joined: 2007-01-31
Post Count: 7239
Merit: 105

PostSubject: Re: Write-Up: Performance Shift Knob   Sun May 17, 2009 4:37 pm

Yeah, the stock PCM definitely has performance shift tables, they just never get touched.

If you want to work on your shift tables, let me know and I'll be happy to help you improve them...
Back to top Go down
98riv
Moderator


Location: USA
Joined: 2007-01-14
Post Count: 872
Merit: 30

PostSubject: Re: Write-Up: Performance Shift Knob   Sun May 17, 2009 10:00 pm

I guess I remembered it wrong. I wonder why they never used them?

_________________
1998 Supercharged Riviera - Custom CAI, Alpine spx-13ref, Infinity 6x9's, Alpine 4 Channel Amp, Kicker KX3, Silverstars, STB, Hawk Brake Pads, Monroe Air Shocks, KYB GR2
Back to top Go down
deekster_caddy
Master


Name: Derek
Age: 42
Location: Reading, MA
Joined: 2007-01-31
Post Count: 7239
Merit: 105

PostSubject: Re: Write-Up: Performance Shift Knob   Mon May 18, 2009 5:21 pm

They pretty much made the same PCM or very similar for all the 3800s, some could handle slight hardware option changes, then for '98 -'02 3800s they should all be the same hardware-wise. Perf shift tables were not used on cars where they didn't see the need, i.e. Pontiac GTP had a Perf Shift button some years, Buicks didn't. (did some regals?)
Back to top Go down
 

Write-Up: Performance Shift Knob

View previous topic View next topic Back to top 
Page 1 of 3Go to page : 1, 2, 3  Next

 Similar topics

-
» ECMlink switchable tunes write up!
» And the Best Performance of the Year
» plucky performance from our boys against the Dutch
» Write-Up: Performance Shift Knob
» Nokya Motorsports Red/Carbonfiber Shift Knob

Permissions in this forum:You cannot reply to topics in this forum
Riviera Performance ::   Supercharged 3800 Tech :: Series II Scans, Tuning, PCM-