Do Not Launch This Car... - Cadillac V-Series - CTS-V, STS-V and XLR-V
User Tag List

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 11 (permalink) Old 02-04-2005, 07:39 PM Thread Starter
Junior Member
 
Join Date: Feb 2005
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Do Not Launch This Car...

I have an 05 CTS-V and have broke my rear end twice trying to launch it. 1st time i did a few burn outs and left aboutt 25ft strips of rubber and the axels slammed in. Then i tried to launch the car at about 3500rpm and it had massive wheel hop and the differential split. I mean it just tore it apart. This car is not meant to launch. you can only feather it off the line and punch it. Take it from me i am still waiting for my car to be fixed.
cts-v speedracer is offline  
Sponsored Links
Advertisement
 
post #2 of 11 (permalink) Old 02-05-2005, 04:20 AM
Junior Member
 
Join Date: Feb 2005
Posts: 18
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I was told not to launch it that high. Mallett told me when I picked mine up from them that I should rev to about 16-1700 rpm's then slip the clutch out.
CTSVader is offline  
post #3 of 11 (permalink) Old 02-05-2005, 06:20 AM
Senior Member
 
ekool's Avatar
 
Join Date: Oct 2003
Location: Alamogordo, NM
Posts: 340
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I've been able to get the perfet launch on the street with no wheelhop and very good acceleration. I can only hope that I can duplicate it at the track.

It came from very light slippage, and tip in of throttle just off idle.




2005 CTS-V - Pictures
ekool is offline  
 
post #4 of 11 (permalink) Old 02-05-2005, 05:27 PM Thread Starter
Junior Member
 
Join Date: Feb 2005
Posts: 5
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
lucky you...

Quote:
Originally Posted by CTSVader
I was told not to launch it that high. Mallett told me when I picked mine up from them that I should rev to about 16-1700 rpm's then slip the clutch out.
i wish the dealership i bought it from would have told me that. this car doesnt launch like the average car. i am going to upgrade the rear suspension now.
cts-v speedracer is offline  
post #5 of 11 (permalink) Old 02-06-2005, 05:13 AM
Premium Member
 
Join Date: Feb 2005
Posts: 28
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Did you have any problems getting your dealership to warranty the car? I know some dealerships are terrible about covering things of that nature.
Well, any dealership in my area. My boss had a 2004 Yukon and the local GM dealership told him if he ever took it off-roading that they may not be able to warranty anything if it broke, basically he couldnt use it in 4x4 mode.
I think that there are alot of dealerships that make it seem like they do not want you to use the performance aspect of your vehicle, well I hope your dealership is not one of those, and you get your Caddy back soon.
LuckStar is offline  
post #6 of 11 (permalink) Old 02-06-2005, 08:51 PM
Junior Member
 
Join Date: Feb 2005
Posts: 11
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Anytime there is axle hop you shouldn't keep doing it. Axle hop is terrible on your drivetrain and as shown can brake parts. So doing keep trying to hook when you can't. The best launch is not attainable by dropping the clutch, easing the clutch is the best thing to do, and if its to high an RPM than the wheels will spin and then hop. Wheelhop is never a good thing increasing the RPM isn't going get you less wheelhop either.

If you can't hook, than don't try to launch, go from a roll, or get better tires.
Nocturn is offline  
post #7 of 11 (permalink) Old 02-07-2005, 04:32 AM
Junior Member
 
StealthV's Avatar
 
Join Date: Jan 2005
Location: Western IL
Posts: 11
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Launch at 1600 rpm, slip the clutch and nail the gas. Easy as pie.

Rick

<-Click now for custom engineered CTS-V accessories: Free-Flow-V Air Intakes, !CAGS Skip Shift Eliminators and Z06V Engine Covers
StealthV is offline  
post #8 of 11 (permalink) Old 02-16-2005, 07:40 PM
Junior Member
 
Join Date: Feb 2005
Posts: 2
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by cts-v speedracer
i wish the dealership i bought it from would have told me that. this car doesnt launch like the average car. i am going to upgrade the rear suspension now.
What are you going to use to upgrade the rearend. Do you think it will be worth it. I have inquired about the BMR System.
Jay Barrows is offline  
post #9 of 11 (permalink) Old 02-17-2005, 09:02 AM
Senior Member
 
ekool's Avatar
 
Join Date: Oct 2003
Location: Alamogordo, NM
Posts: 340
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I have contracted Getrag about getting steeper gears for the rear end (3.92's) but have not heard a response.

I also contacted Michael Weinberg @ RSGear.com about strengthening the rear end, and this is what he had to say:

Quote:
Hi John,

We have new CTS-V ratios in the design stage at present, but are probably 6 months away from production.

I spent all of last years racing season driving a CTS-V in competition for Powell Motorsports and GM. We developed the car for the Grand Am Cup series and SCCA T2. The wheel hop is generated by the 5 link rear and the damage to the diffs is a product of suspension problems and not the diff design. We did not experience any diff failures and our races are all 3 hours long or more. If you wish you can contact John Powell at jrpowell at ican.net and see if he will sell you the corrected set-up to deal with the wheel hop.

I am not sure that there are real gains to be had from a ratio change if you can't get the power to hook up to the ground.

Best regards,

Mike
I just kicked off an email to John and await his response.

edit: I've obfuscated his email address a bit so that spam traps dont pick it up.




2005 CTS-V - Pictures
ekool is offline  
post #10 of 11 (permalink) Old 03-03-2005, 08:44 AM
Member
 
Join Date: Feb 2005
Location: Tucson, AZ
Posts: 32
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by ekool
edit: I've obfuscated his email address a bit so that spam traps dont pick it up.
I thought that was immoral, fattening, or caused you to go blind.......
carpe dm is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Cadillac V-Series - CTS-V, STS-V and XLR-V forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome