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2005 Cadillac CTS-V
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Discussion Starter #1
1. How do you electronically lighten the flywheel?

2. What is torque management? May explain why everyone wants to get rid of it.

Thanks

I'm really waffling between buying EFILive and Diablo Predator handheld. I will never likely go beyond catbacks, CAI and headers since its a daily driver and my wife is cheap :thepan:
 

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Discussion Starter #5

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My understanding of "torque managment" is part of the stock ECU program which reduces torque under certain circumstances. One of these is when shifting. A skilled ECU tuner can "turn off" this torque management.
 

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Discussion Starter #7
My understanding of "torque managment" is part of the stock ECU program which reduces torque under certain circumstances. One of these is when shifting. A skilled ECU tuner can "turn off" this torque management.
Thats kinda what I gathered as well but I'm confused if it only applies to Automatic transmissions. It seems to mostly apply when shifting to 'let off the throttle' so to speak, likely so the engine or torque converter/clucthes don't blow.
 

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Torque managment is definitely part of the CTS-V program. I know this because TPIS turned my torque management "off" when they tuned my ECU.
 

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See you in the funny papers
04 CTS-V, 05 STS, 07 SRX- All sold :(
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Torque Management reduces engine torque through by retarding timing under sudden applications of throttle (like shifting) in an effort to reduce wear on the drivetrain. Disabling it can have good effects like lower ETs and better acceleration, or bad effects like snapped halfshafts, blown rears and loss of control due to exessive wheelspin on a 1-2 upshift.

I have no affiliation with Stealth so this is just specualtion, but I would assume that the "electronic flywheel lightening" is what he calls eliminating the "lag" in the throttle response and recalibrating how the car decelerates to make the RPMs drop faster, providing results similar to a lightened flywheel.
 

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Discussion Starter #12


^ this is cute, but I must admit it went right over my head.
I think its an inside joke, sources I cannot reveal tell me the following:

Urby = Gene Simmons
StealthV = Ace Frehley

Apparently they are both original members of Kiss.
 

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2007 CTS-V (Thunder Grey)
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I pulled this off of a Corvette Forum:

Torque Management

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 overstress of the powertrain components
To reduce engine power during certain throttle actuator control (TAC) system faults
To limit the engine power when the brakes are applied more than approximately 40 percent
To prevent damage to the vehicle during certain abusive maneuvers
The PCM monitors the following sensors and engine parameters to calculate engine output torque:


Air/Fuel ratio
Mass Air Flow (MAF)
Manifold Absolute Pressure (MAP)
Intake Air Temperature (IAT)
Spark Advance
Engine Speed
Engine Coolant Temperature (ECT)
A/C Clutch Status
The PCM monitors the torque converter status, the transmission gear ratio, and the extended brake switch input in order to determine if torque reduction is required. The PCM retards the spark as appropriate to reduce engine torque output 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 maneuver.

*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 brakes are applied with moderate to heavy throttle (with the traction system active).
When the driver is performing harsh or abusive maneuvers, 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 the 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 maneuver.


Copyright © 2004 ALLDATA LLC

That's clear as mud :bigroll:
 

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Lemon Law'd '05 V
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1. How do you electronically lighten the flywheel?

2. What is torque management? May explain why everyone wants to get rid of it.

Thanks

I'm really waffling between buying EFILive and Diablo Predator handheld. I will never likely go beyond catbacks, CAI and headers since its a daily driver and my wife is cheap :thepan:
I remember having a few of my threads pull a Houdini act after this stuff was discussed, so I'll tread lightly...

#1....uh, certain parameters of the tuning tables are tweaked to make the engine spin-up faster when under light-load and spin-down when throttle is lifted.
#2....been answered above. Slight hesitation in power to allow tires to stay in contact with road/limit wheel-hop/save tranny-driveline parts.

As WW stated above...the LS1 forum has a phenomenal amount of info...much to learn. Both EFILive and HPTuners have great forums to help you learn/ask as you go along. I've found HPT to be a little more open, where members are willing to help with certain questions....EFI seems to be a little more tight...JMHO. You can also go on the Vette boards...your motor is a Vette mill.

There are several who tune themselves on this board as well, and have a wealth of knowledge. Most of them are great guys who would probably help you if you needed it.

If you plan on only doing a few mods, then take the money you'd spend on the Diablo/Superchips/EFILive/HPTuners and go to a good shop and have your car tuned on the street and dyno. Although there are some good "mail-order" tunes, and this is a whole 'nother bag-o-worms that I don't want to open, a custom tune by an experienced tuner is best. Any good "Vette" tuner in your area can do it...and there are many more Vette shops than Caddy shops.

Do your homework, don't jump into this quickly, do more reading/learning/homework and you might learn more than you thought.

Good luck,
Tom
 

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I found the post I wanted you to read. If you can understand the discussion, the terms, the process of tuning...then you can do it. I will say that it took me MANY hours...actually countless...to even get to the point of being able to discuss tuning.
http://www.cadillacforums.com/forums/cadillac-cts-v-series-forum/61129-help-tuning-v.html?highlight=Discussion+on+something

If it sounds like it's for you...do it, if you have more time than you know what to do with, if you are an OCD kind-of-guy, if you need a new hobby...do it.

In the end...I didn't. HPTuners was delayed with their new software and I decided to lemon-law the V. Funny though...I wound up with a 2002 Z06 with a maggie, same motor. I had a local Vette specialist work with me on the tune for smoothness and roadcourse work, with meth injection. Now I can spend the time that my wife says I don't have on the hard parts of the car. I think I would be divorced if I bought the HPTuners/EFILive when I wanted to...

Be good and good luck,
Tom
 

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Discussion Starter #17
Tom - All I can say about how that old tuning thread started out is :eek:

Definately sheds some light on the one of the responses I got. I'll reserve judgement as the over whelming majority of responses I've gotten from this board (yours included) have been extremely educational and helpful.

It appears there is some history here and some open wounds based on a similar thread I discovered on another board. Yes its true I do like to do my own research and turn my own wrenches before asking for help.

Apparently any discussion of tuning outside of buying a tune is better discussed elsewhere. For the record I am leaning towards going with EFILive only because I have played with the free demo and they have a good deal going on with the v1 (LS6) commercial package. Its basically a few hundred more than the handheld which is likely more than I'll ever need. But I am a software guy by trade and a wrench turner by heart so the lure is appealing.

As a wrench turner I have recently completed a kit car based on a 1929 Mercedes running a 1979 Pinto V6 driveline. All the experience I ever wanted with a carburetored engine. Bought it off Ebay the previous owner started the project in the early 80s and it sat in the back of a body shop for 20 years. What a mess, a fun project rather inexpensive but fueled my old high school memories of racing and screwing around with my Mustang.

For now the V will be the new 'other woman' as my family refers to her.

Best of luck with your new ride I bet its a handfull, in a good way.

Scott
 
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