Has anyone done this??????
Thread Starter
Instructor
Joined: Aug 2003
Posts: 112
Likes: 1
From: Denver CO
Has anyone done this??????
I have a 99 that I drag race, and I removed the ABS System Completely, Mechanical and Computer. I cannot do a burnout at all now, as the ASR kicks on and bogs the motor. Computer scan shows the timing just hit the floor. The car is Ok other that the burnout. Does anyone have any info on how to defeat the ASR completely?????
Safety Car
Joined: Aug 2000
Posts: 4,933
Likes: 30
From: San Rafael CA
I don't know what you removed ... but it doesn't sound like you took out the EBCM ....I'm assuming you're using the "ASR" to mean traction control.
If you want to turn off traction control .... press the button on the console that has the icon of a Corvette leaving a skid mark ......
Whatever you took out ... you might want to consider putting it back in ......
If you want to turn off traction control .... press the button on the console that has the icon of a Corvette leaving a skid mark ......
Whatever you took out ... you might want to consider putting it back in ......
Drifting
Joined: May 2005
Posts: 1,590
Likes: 1
From: Littleton Colorado
Asp ?? The C5's have a TCS system, Traction Control System. Yes, it does work with the brakes, but it also pulsl timing and fuel. No, it can't just be ripped out, you have to do some tune modifications. Get with a tuner and have them help you out. Not sure if I would recomend you to try and tune it out youself if you have never worked with a C5 type system. Or like stated above, turning it off may be all you need.
There is also a active handling system which can also apply brakes.
I would suggest visting the drag race forum here and do some research before removing stuff. You may cause yourself more work than needed. But, then again I don't know what is good to do for drag racing, I like turns LOL...
What kind of times are you doing to justify taking out the ABS??
Tech Contributor
Joined: Oct 1999
Posts: 41,058
Likes: 9,820
From: Charlotte, NC (formerly Endicott, NY)
You should explain exactly what modules you removed from the car and any other things such as tuning you think you have done. Use the correct terms for the modules.
The Traction Control System is part of the ABS system and if you had removed the EBCM it would not be able to request a reduction in power.
Bill
The Traction Control System is part of the ABS system and if you had removed the EBCM it would not be able to request a reduction in power.
Bill
Last edited by Bill Dearborn; Jun 9, 2008 at 11:46 AM.
Race Director
Joined: May 2005
Posts: 15,960
Likes: 21
From: West Norriton PA
St. Jude Donor '08
You should explain exactly what modules you removed from the car and any other things such as tuning you think you have done. Use the correct terms for the modules.
The Traction Control System is part of the ABS system and if you had removed the EBCM it would not be able to request a reduction in power.
Bill
The Traction Control System is part of the ABS system and if you had removed the EBCM it would not be able to request a reduction in power.
Bill
Very hard to figure out what you did. If EBCM is out no signal should be sent to reduce timing to PCM.
Active handling gyroscope is on passenger side floor next to tunnel. Have you removed pind from wiring harness at PCM for traction control and other items that you removed ??
Thread Starter
Instructor
Joined: Aug 2003
Posts: 112
Likes: 1
From: Denver CO
The car is basically a "Straight Line Street Car". She lives at the Drag Strip, and cruises the streets occassionally. Last year it ran 9.70's at 144 MPH, and this year we needed to reduce weight shooting for 9.50's.
I removed the entire ABS unit, re-routing the brakelines off the master cylinder. All the wiring was also removed from the EBCU. All the wiring was also removed to the wheel speed sensors, shocks and magnasteer. We've narrowed it down that the ASR is alive in the Fly-by wire brain, even though we've cut off the leggs and arms. It is only a problem if you have your foot on the brake, and a brake signal is being sent, then a power brake produces the "bog" (scan shows timing spikes down to ZERO). If you use the line lock (foot off the brake) everything is Ok. I know this is probably something that the majority of you aren't familiar with, I was just hoping that someone else had traveled this road. Thanks for your inputs!!!
I removed the entire ABS unit, re-routing the brakelines off the master cylinder. All the wiring was also removed from the EBCU. All the wiring was also removed to the wheel speed sensors, shocks and magnasteer. We've narrowed it down that the ASR is alive in the Fly-by wire brain, even though we've cut off the leggs and arms. It is only a problem if you have your foot on the brake, and a brake signal is being sent, then a power brake produces the "bog" (scan shows timing spikes down to ZERO). If you use the line lock (foot off the brake) everything is Ok. I know this is probably something that the majority of you aren't familiar with, I was just hoping that someone else had traveled this road. Thanks for your inputs!!!
Race Director
Joined: May 2005
Posts: 15,960
Likes: 21
From: West Norriton PA
St. Jude Donor '08
The car is basically a "Straight Line Street Car". She lives at the Drag Strip, and cruises the streets occassionally. Last year it ran 9.70's at 144 MPH, and this year we needed to reduce weight shooting for 9.50's.
I removed the entire ABS unit, re-routing the brakelines off the master cylinder. All the wiring was also removed from the EBCU. All the wiring was also removed to the wheel speed sensors, shocks and magnasteer. We've narrowed it down that the ASR is alive in the Fly-by wire brain, even though we've cut off the leggs and arms. It is only a problem if you have your foot on the brake, and a brake signal is being sent, then a power brake produces the "bog" (scan shows timing spikes down to ZERO). If you use the line lock (foot off the brake) everything is Ok. I know this is probably something that the majority of you aren't familiar with, I was just hoping that someone else had traveled this road. Thanks for your inputs!!!
I removed the entire ABS unit, re-routing the brakelines off the master cylinder. All the wiring was also removed from the EBCU. All the wiring was also removed to the wheel speed sensors, shocks and magnasteer. We've narrowed it down that the ASR is alive in the Fly-by wire brain, even though we've cut off the leggs and arms. It is only a problem if you have your foot on the brake, and a brake signal is being sent, then a power brake produces the "bog" (scan shows timing spikes down to ZERO). If you use the line lock (foot off the brake) everything is Ok. I know this is probably something that the majority of you aren't familiar with, I was just hoping that someone else had traveled this road. Thanks for your inputs!!!
http://www.phoenixperformanceinc.com/
Tech Contributor
Joined: Oct 1999
Posts: 41,058
Likes: 9,820
From: Charlotte, NC (formerly Endicott, NY)
Bill
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Safety Car
Joined: Aug 2000
Posts: 4,933
Likes: 30
From: San Rafael CA
The car is basically a "Straight Line Street Car". She lives at the Drag Strip, and cruises the streets occassionally. Last year it ran 9.70's at 144 MPH, and this year we needed to reduce weight shooting for 9.50's.
I removed the entire ABS unit, re-routing the brakelines off the master cylinder. All the wiring was also removed from the EBCU. All the wiring was also removed to the wheel speed sensors, shocks and magnasteer. We've narrowed it down that the ASR is alive in the Fly-by wire brain, even though we've cut off the leggs and arms. It is only a problem if you have your foot on the brake, and a brake signal is being sent, then a power brake produces the "bog" (scan shows timing spikes down to ZERO). If you use the line lock (foot off the brake) everything is Ok. I know this is probably something that the majority of you aren't familiar with, I was just hoping that someone else had traveled this road. Thanks for your inputs!!!
I removed the entire ABS unit, re-routing the brakelines off the master cylinder. All the wiring was also removed from the EBCU. All the wiring was also removed to the wheel speed sensors, shocks and magnasteer. We've narrowed it down that the ASR is alive in the Fly-by wire brain, even though we've cut off the leggs and arms. It is only a problem if you have your foot on the brake, and a brake signal is being sent, then a power brake produces the "bog" (scan shows timing spikes down to ZERO). If you use the line lock (foot off the brake) everything is Ok. I know this is probably something that the majority of you aren't familiar with, I was just hoping that someone else had traveled this road. Thanks for your inputs!!!
Based on Bill Dearborn's post above .....
Circuit 20 (LT BLUE wire) to the TAC module is energized when you step on the brake pedal ........ might want to look into killing that circuit ..... I'm not responsible for "unintended consequences" of defeating this circuit .... GM put it there for a reason ......
Last edited by BlackZ06; Jun 9, 2008 at 11:31 PM.