Gears & Axles Driveshafts | Rearends | Differentials | Gears | 12 Bolt | 9 Inch | Dana

Torque management experts, is this TM?

Thread Tools
 
Search this Thread
 
Old Jul 14, 2002 | 09:58 PM
  #1  
Nick's WS6's Avatar
Thread Starter
TECH Regular
 
Joined: Nov 2001
Posts: 410
Likes: 0
From: Madison Heights, MI
Default Torque management experts, is this TM?

Notice once the shift happens the rpms don't go up for 5 seconds.

Current Gear(.) Engine Speed(RPM) Ignition Timing Advance(°) Throttle Position Angle(%)
1 791.8 28 0
1 808.8 26.5 0
1 796.3 28.5 0
1 787 28.5 0
1 783.3 28.5 0
1 797.8 27 0
1 805.3 27 0
1 827.5 25.5 0
1 801.3 27 0
1 775.8 31 0
1 773 29 0
1 790 26 14.1
1 889.8 24.5 21.2
1 1405 25.5 28.2
1 1702.5 27 38
1 1972.8 27 45.9
1 2202.3 27.5 52.2
1 2378 27.5 63.1
1 2559 27 93.7
1 2908 24.5 100
1 3233.3 24.5 100
1 3608.8 24.5 100
1 3982.3 25 100
1 4412.8 25.5 100
1 4957 26.5 100
1 5390.8 27 100
2 5783.5 27 100
2 5911.3 27 100
2 4632.3 24 100
2 3288.5 24 100
2 3476 24.5 100
2 3555.5 23.5 100
2 3589.5 24 100
2 3650.8 24 100
2 3700.3 24 100
2 4008.8 25.5 100
2 3991.8 25.5 100
2 4100.8 25.5 100
2 4283 25.5 100
2 4462.8 26 100
2 4516.5 26 100
2 4642.3 26.5 100
2 4800 27 100
2 4917.8 27.5 100
2 5064 28 93.7
2 5190 29.5 35.3
4 4975 41 0
4 4610.8 41 0
4 4182 41.5 0.4
4 3869.3 41.5 0.4
4 3616.5 41.5 0
4 3334.8 41.5 0.4
4 3109.8 41.5 0.4
4 2711.5 40.5 0
4 2217.3 39.5 0.4
4 2140.8 39.5 0.4
4 2140 39.5 0.4
4 2126.8 39.5 0.4
4 2095 39.5 0.4
4 2096.5 39 0.4
4 2099 39.5 0.4
4 2094.5 39 0.4
4 2093.8 39.5 0
4 2086.3 39.5 0.4
4 2081.3 39 0.4
4 2063 39 0.4
4 2069 39 0.4
4 2058 39 0.4
4 2050 39 0.4
Reply
Old Jul 15, 2002 | 07:42 AM
  #2  
gwj's Avatar
gwj
TECH Addict
 
Joined: Nov 2001
Posts: 2,003
Likes: 0
From: Live Oak, FL - in the woods where the creatures lurk.
Default Re: Torque management experts, is this TM?

A4 trans? Looks like normal rpm dropoff with a stock converter.
Reply
Old Jul 15, 2002 | 08:45 AM
  #3  
Windy City's Avatar
TECH Apprentice
 
Joined: Nov 2001
Posts: 387
Likes: 0
From: South Elgin, IL
Default Re: Torque management experts, is this TM?

I don't see any TQM in what you posted.

I just ATAPed a friends '02 TA Saturday at the track and he showed -10 timing just before the shift into second. Now that's TQM!
Reply
Old Jul 15, 2002 | 09:08 AM
  #4  
Nick's WS6's Avatar
Thread Starter
TECH Regular
 
Joined: Nov 2001
Posts: 410
Likes: 0
From: Madison Heights, MI
Default Re: Torque management experts, is this TM?

OK so what would cause the rpms to not go up for 5 seconds after the shift.
Reply
Old Jul 15, 2002 | 02:09 PM
  #5  
Ragtop 99's Avatar
TECH Senior Member
iTrader: (7)
 
Joined: Nov 2001
Posts: 9,491
Likes: 1
From: Bethesda, MD
Default Re: Torque management experts, is this TM?

How did you get 5 seconds? ATAP logs more than once a second, there is a timing counter you can see when you dump the data into Excel. 1-2 Upshift shows only a couple frames, not counting the upshift lag; part of which is programmed into the computer.
Reply
Old Jul 15, 2002 | 03:18 PM
  #6  
Nick's WS6's Avatar
Thread Starter
TECH Regular
 
Joined: Nov 2001
Posts: 410
Likes: 0
From: Madison Heights, MI
Default Re: Torque management experts, is this TM?

I can count it when I'm driving. It's shown as about 10 frames here.
Reply
Old Jul 15, 2002 | 07:24 PM
  #7  
WILWAXU's Avatar
TECH Senior Member
20 Year Member
iTrader: (6)
 
Joined: Nov 2001
Posts: 14,378
Likes: 1
From: League City, TX
Default Re: Torque management experts, is this TM?

Can't really figure that out above.. but, look at the data. It's normal for a stock PCM to pull timing on a shift. But.. if this last more than a few "frames" of autotap, you have TM.

Example:

My car would do something like this on a shift:

24
24
24.5
-10
-10
-8
0
10
17
20
24.5
25
25
25.5

BTW: It's not incommon for timing to go to -10 on a shift for one maybe 2 frames on a stock PCM.. anything more isn't good.

If there is any question, get it tuned. I ran in circles for 6 months with this thing, and tried about everything... tuning was the only cure.

<small>[ July 15, 2002, 07:28 PM: Message edited by: WILWAXU ]</small>
Reply
Old Jul 15, 2002 | 07:35 PM
  #8  
Nick's WS6's Avatar
Thread Starter
TECH Regular
 
Joined: Nov 2001
Posts: 410
Likes: 0
From: Madison Heights, MI
Default Re: Torque management experts, is this TM?

Funny you say that is I have tuning.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-1

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-2

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Jul 16, 2002 | 06:39 AM
  #9  
gwj's Avatar
gwj
TECH Addict
 
Joined: Nov 2001
Posts: 2,003
Likes: 0
From: Live Oak, FL - in the woods where the creatures lurk.
Default Re: Torque management experts, is this TM?

Like I said, the rpm dropoff looks normal for an A4 car with stock converter. Here's the rpm change on the 1-2 shift I get with an ST3500 / 2.73 combo. Notice the rpm drop is not as low as yours, but substantially better than with the stock TC.
Current Gear Engine Speed
1 606
1 617
1 1094
1 2934
1 3448
1 4134
1 4865
1 5208
1 5405
1 5527
1 5537
1 5450
1 5366
1 5630
1 5870
2 6170
2 5988
2 5527
2 4878
2 4840
2 4892
2 4952
2 5028
2 5086
2 5147
2 5201
2 5263
2 5308
2 5353
2 5419
2 5502
2 5586
2 5652
2 5714
2 5794
2 5848
3 5928
Reply
Old Jul 16, 2002 | 07:07 AM
  #10  
Nick's WS6's Avatar
Thread Starter
TECH Regular
 
Joined: Nov 2001
Posts: 410
Likes: 0
From: Madison Heights, MI
Default Re: Torque management experts, is this TM?

Right your rpms drop but they don't stay steady. Once they drop they imediatly go back up. I have 10 frames where the rpm's are staying at about 4000 rpm's. I'm going to try to get a video of this tonight.
Reply
Old Jul 19, 2002 | 05:38 PM
  #11  
WILWAXU's Avatar
TECH Senior Member
20 Year Member
iTrader: (6)
 
Joined: Nov 2001
Posts: 14,378
Likes: 1
From: League City, TX
Default Re: Torque management experts, is this TM?

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Nick's WS6:
<strong>Funny you say that is I have tuning.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Well.. then you need to talk to whoever did the tuning. If the tuner wasn't asked to remove TM.. then it probably was left alone. Ed Wright got rid of mine completely!
Reply
Old Jul 19, 2002 | 06:24 PM
  #12  
2xLS1's Avatar
TECH Senior Member
20 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (25)
 
Joined: Nov 2001
Posts: 5,649
Likes: 9
From: Warr Acres, OK
Default Re: Torque management experts, is this TM?

A-tap is monitoring the ECM. The Current Gear is only what the ECM thinks it is by the signal it has sent to the tranny .The delay you are seeing is the delay between the ECM sending the electronic signal to shift, and the mechanical shifting of the tranny. It takes some time for the mechanical internals to complete the shift and for the RPM's to drop.

Torque management is a function of the PCM that reduces engine power
under certain conditions. Torque Management is performed for the
following reasons:
To prevent overstressing the powertrain components.
To prevent damage to the vehicle during certain abusive maneuvers.
To reduce engine speed when the IAC is out of the normal operating
range.

The PCM monitors the following sensors and engine parameters to
calculate engine output torque:
Air/Fuel ratio
Mass Air Flow
Manifold Asolute Pressure
Intake Air Temperature
Spark Advance
Engine Speed
Engine Coolant Temperature
A/C Clutch Status

The PCM monitors the torque converter status, the transmission gear
ratio, and the engine speed in order to determine if torque reduction
is required. The PCM retards the spark as appropriate to reduce
engine torque if torque reduction is required. The PCM also shuts
off the fuel to certain injectors to reduce the engine power in the
case of an abusive manuever.

The following are instances when engine power reduction is likely to
be experienced:
During transmission upshifts and downshifts.
Heavy acceleration from a standing start.
The IAC is out of the normal operating range.
When the driver is performing harsh or abusive manuevers such as
shifting into gear at high throttle angles or shifting the
transmission from reverse to drive to create a rocking motion.

The driver is unlikely to notice the torque management actions in the
first two instances. The engine power output will be moderate at
full throttle in the other two cases.

The PCM calculates the amount of spark retard necessary to reduce
engine power by the desired amount. The PCM disables the fuel
injectors for cylinders 1, 4, 6, and 7 in the case of an abusive
manuever.
Reply
Old Jul 19, 2002 | 06:29 PM
  #13  
2xLS1's Avatar
TECH Senior Member
20 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (25)
 
Joined: Nov 2001
Posts: 5,649
Likes: 9
From: Warr Acres, OK
Default Re: Torque management experts, is this TM?

A-tap is monitoring the ECM. The Current Gear is only what the ECM thinks it is by the signal it has sent to the tranny .The delay you are seeing is the delay between the ECM sending the electronic signal to shift, and the mechanical shifting of the tranny. Remember, at WOT, your RPM's are building extremely fast. It takes some time for the mechanical internals to complete the shift and for the RPM's to drop.

Torque management is a function of the PCM that reduces engine power
under certain conditions. Torque Management is performed for the
following reasons:
To prevent overstressing the powertrain components.
To prevent damage to the vehicle during certain abusive maneuvers.
To reduce engine speed when the IAC is out of the normal operating
range.

The PCM monitors the following sensors and engine parameters to
calculate engine output torque:
Air/Fuel ratio
Mass Air Flow
Manifold Asolute Pressure
Intake Air Temperature
Spark Advance
Engine Speed
Engine Coolant Temperature
A/C Clutch Status

The PCM monitors the torque converter status, the transmission gear
ratio, and the engine speed in order to determine if torque reduction
is required. The PCM retards the spark as appropriate to reduce
engine torque if torque reduction is required. The PCM also shuts
off the fuel to certain injectors to reduce the engine power in the
case of an abusive manuever.

The following are instances when engine power reduction is likely to
be experienced:
During transmission upshifts and downshifts.
Heavy acceleration from a standing start.
The IAC is out of the normal operating range.
When the driver is performing harsh or abusive manuevers such as
shifting into gear at high throttle angles or shifting the
transmission from reverse to drive to create a rocking motion.

The driver is unlikely to notice the torque management actions in the
first two instances. The engine power output will be moderate at
full throttle in the other two cases.

The PCM calculates the amount of spark retard necessary to reduce
engine power by the desired amount. The PCM disables the fuel
injectors for cylinders 1, 4, 6, and 7 in the case of an abusive
manuever.

<small>[ July 19, 2002, 06:32 PM: Message edited by: 2xLS1 ]</small>
Reply
Old Aug 19, 2002 | 01:05 PM
  #14  
Nick's WS6's Avatar
Thread Starter
TECH Regular
 
Joined: Nov 2001
Posts: 410
Likes: 0
From: Madison Heights, MI
Default Re: Torque management experts, is this TM?

I have ataped the car to see if fuel is being shut off and when the 4000 rpm thing happens the injector pulse is 16 miliceconds. the exact same as when it's shifting normal. It's not droping timing and i don't know what to look at if it's geting rid of spark.
Reply




All times are GMT -5. The time now is 06:26 AM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE