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Cobra IRS wheel hop

  • Thread starter Thread starter stangsalwayswin
  • Start date Start date Sep 10, 2007
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stangsalwayswin

New Member
May 23, 2007
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Alexander Ar
Sep 10, 2007
#1
  • Sep 10, 2007
  • #1
I just purchased a 99 cobra vert and it has a bad case of wheel hop. I have never had a IRS mustang before so what is the best way to fix this problem?
 
U

Uncle Meat

Banned
Jun 13, 2002
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Prattville, Alabama
Sep 10, 2007
#2
  • Sep 10, 2007
  • #2
The best way? Remove the IRS and replace with a SRA from a GT.

U.M.
 
K

Kilgore Trout

Fried or Broiled ?
10 Year Member
Mar 30, 2005
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Sep 10, 2007
#3
  • Sep 10, 2007
  • #3
I would not ever consider removing the IRS from any Cobra I owned

There are ways to correct the wheel hop which are well documented on the internet and revealed with a simple Google search.

Additionally, Maximum Motorsports makes some excellent kits for the Cobra IRS suspension

From the CobraBob FAQ tome 'o knowledge:
There are several options for reducing wheel hop. Amazon Tuning Solutions and Billetflow have an IRS kit for the Cobra designed to specifically reduce wheel hop. In addition, some improvement can be made by stiffening the suspension and frame. This can be accomplished using sub-frame connectors (full-length, weld on are best, as there is no “bolt walk”) and improved IRS bushings. Steeda products for both of these are available here: http://www.steeda.com/
 
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grey03cobravert

New Member
Sep 20, 2006
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Sep 10, 2007
#4
  • Sep 10, 2007
  • #4
i heard of people breaking level 5 shafts still?
 

RB88

New Member
May 31, 2004
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Mobile, Al
Sep 10, 2007
#5
  • Sep 10, 2007
  • #5
My fix was to lower the car, and put on sticky tires.... If you don't spin, you don't hop. I understand that not all want to run drag radials though. Good luck!
 
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grey03cobravert

New Member
Sep 20, 2006
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Sep 10, 2007
#6
  • Sep 10, 2007
  • #6
Kilgore Trout said:
I would not ever consider removing the IRS from any Cobra I owned

There are ways to correct the wheel hop which are well documented on the internet and revealed with a simple Google search.

Additionally, Maximum Motorsports makes some excellent kits for the Cobra IRS suspension

From the CobraBob FAQ tome 'o knowledge:
There are several options for reducing wheel hop. Amazon Tuning Solutions and Billetflow have an IRS kit for the Cobra designed to specifically reduce wheel hop. In addition, some improvement can be made by stiffening the suspension and frame. This can be accomplished using sub-frame connectors (full-length, weld on are best, as there is no “bolt walk”) and improved IRS bushings. Steeda products for both of these are available here: http://www.steeda.com/
Click to expand...
 
U

Uncle Meat

Banned
Jun 13, 2002
0
1
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Prattville, Alabama
Sep 10, 2007
#7
  • Sep 10, 2007
  • #7
Kilgore Trout said:
I would not ever consider removing the IRS from any Cobra I owned
Click to expand...
Hey, he asked the BEST way... no matter HOW much money you dump into the IRS it will never be as good for traction in a straight line as an SRA.

U.M.
 

stangsalwayswin

New Member
May 23, 2007
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Alexander Ar
Sep 10, 2007
#8
  • Sep 10, 2007
  • #8
Yeah I want to keep the IRS. I will check out these sites and see what all i can get.
 
U

Uncle Meat

Banned
Jun 13, 2002
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Prattville, Alabama
Sep 10, 2007
#9
  • Sep 10, 2007
  • #9
stangsalwayswin said:
Yeah I want to keep the IRS. I will check out these sites and see what all i can get.
Click to expand...
If that's the case then start with installation of some better rubber. If that doesn't help there's all sorts of mods you can do to the IRS. Each one is progressively more difficult and more expensive.

U.M.
 
K

Kilgore Trout

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Mar 30, 2005
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#10
  • Sep 10, 2007
  • #10
IRS Grip Box for 1999-04 Cobra
$974.48
Part #: MMRG-22
Manufacturer: Maximum Motorsports

The MM Rear Grip Boxes include what you need to bring the performance of the IRS up to the same high level that MM parts have done for the solid-axle equipped cars. These three different Rear Grip Boxes allow you to outfit your car to match your desired performance level. MM's Sales Associates can also custom-build a Rear Grip Box to meet your specific needs.

The Rear Grip Box includes the following parts:

MMRG-22

* Delrin Rear Lower Control Arm Bushings
* Delrin Rear Upper Control Arm Bushings
* IRS Subframe bushings
* IRS adjustable Tie-rod kit
* Rear swaybar bushings
* Rear sway bar end link kit
* Aluminum pinion angle adjusting differential mounts
 

countrysvt

New Member
Aug 26, 2007
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Sep 10, 2007
#11
  • Sep 10, 2007
  • #11
the tires have alot to do with the wheel hop to and them being hot or cold too!
 
K

Kilgore Trout

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Mar 30, 2005
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#12
  • Sep 10, 2007
  • #12
Tires are absolutely a huge factor...
 

stangsalwayswin

New Member
May 23, 2007
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Alexander Ar
Sep 10, 2007
#13
  • Sep 10, 2007
  • #13
I do have a set of slicks left over from my 04 GT but I think ill just put drag radials on my cobra.
 
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grey03cobravert

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Sep 20, 2006
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Sep 10, 2007
#14
  • Sep 10, 2007
  • #14
Uncle Meat said:
Hey, he asked the BEST way... no matter HOW much money you dump into the IRS it will never be as good for traction in a straight line as an SRA.

U.M.
Click to expand...
i ditched the irs , my rear cover on it always leaked on my 99 and my 03 cobras 900 bucks to cure the irs to me is not worth it . jmo
 
U

Uncle Meat

Banned
Jun 13, 2002
0
1
0
Prattville, Alabama
Sep 11, 2007
#15
  • Sep 11, 2007
  • #15
Kilgore Trout said:
IRS Grip Box for 1999-04 Cobra
$974.48
Part #: MMRG-22
Manufacturer: Maximum Motorsports

The MM Rear Grip Boxes include what you need to bring the performance of the IRS up to the same high level that MM parts have done for the solid-axle equipped cars. These three different Rear Grip Boxes allow you to outfit your car to match your desired performance level. MM's Sales Associates can also custom-build a Rear Grip Box to meet your specific needs.

The Rear Grip Box includes the following parts:

MMRG-22

* Delrin Rear Lower Control Arm Bushings
* Delrin Rear Upper Control Arm Bushings
* IRS Subframe bushings
* IRS adjustable Tie-rod kit
* Rear swaybar bushings
* Rear sway bar end link kit
* Aluminum pinion angle adjusting differential mounts
Click to expand...

I guess if you believe the advertisements....

Here get one of these too while you're at it!



Plus unless you're going to do the work yourself the installation of the kit mentioned above is a MAJOR PITA! Most guys report 8 hours just to install the IRS sub-frame bushings alone.

Remember, the more you do to increase the traction potential of the IRS, the more strain you put on the other components. You'll have to start dealing with the other weak areas.... like the factory half-shafts:



..and the weak 10-spline input shaft.

Last but not least switching to a SRA shaves almost 150lbs of weight from this pig of a car.

U.M.
 
K

Kilgore Trout

Fried or Broiled ?
10 Year Member
Mar 30, 2005
4,749
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Sep 11, 2007
#16
  • Sep 11, 2007
  • #16
Comparing the fine Maximum Motorsports IRS grip box to the Turbonator?

Mmm kay do what you have to do...
 
U

Uncle Meat

Banned
Jun 13, 2002
0
1
0
Prattville, Alabama
Sep 11, 2007
#17
  • Sep 11, 2007
  • #17
Kilgore Trout said:
Comparing the fine Maximum Motorsports IRS grip box to the Turbonator?

Mmm kay do what you have to do...
Click to expand...
No... I was calling attention to the "Truth in Advertising" factor. I just have issues with the statement in their ad...

The MM Rear Grip Boxes include what you need to bring the performance of the IRS up to the same high level that MM parts have done for the solid-axle equipped cars.

U.M.
 
K

Kilgore Trout

Fried or Broiled ?
10 Year Member
Mar 30, 2005
4,749
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134
Sep 11, 2007
#18
  • Sep 11, 2007
  • #18
Yeah, I noticed that also... I think what they are trying to say is that they are now making their great parts for IRS. I do not think they are saying that their great parts will make IRS = SRA...

At the end of the day MM makes great suspension parts and if I had $950 I would absolutely get that kit, take the Cobra out of service for the winter, and install it in my garage.
 
U

Uncle Meat

Banned
Jun 13, 2002
0
1
0
Prattville, Alabama
Sep 11, 2007
#19
  • Sep 11, 2007
  • #19
Kilgore Trout said:
At the end of the day MM makes great suspension parts and if I had $950 I would absolutely get that kit, take the Cobra out of service for the winter, and install it in my garage.
Click to expand...
I agree. MM does make quality parts for both IRS & SRA applications. Although from everything I've read I'd never attempt to replace the IRS subframe bushings in my garage unless you have a overhead lift or you planned on removing the whole IRS out of the car first. I hear drilling out those stock bushings is not something you'd wish even on your enemies...

U.M.
 

stangsalwayswin

New Member
May 23, 2007
22
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Alexander Ar
Sep 11, 2007
#20
  • Sep 11, 2007
  • #20
Maybe I will consider swaping to a SRA. Is it an easy swap?
 
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