v8musclecobra

is there any way to stiffen an 03-04 cobra's irs enough where it works just as good as a live rear axel, cause ive heard a live rear axel is a very rough and unenjoyable ride.

IWinULose

I have no complaints about any live axle car I've had. As far as your question... Say you take an IRS and stiffen it... make it almost to where it won't move... What have you done besides create live axle? I think you pick one. Either IRS(better ride) or live axle(for more horsepower and better launches). It seems to me like you would be defeating the purpose of the IRS if you started decreasing its flex and stiffening it. But that's just my opinion.

jdaniel

To answer your question, you can buy the IRS brace and bushings and that will allow you to run it a lot harder from a dig and will definetly give you better traction because it wont flex as hard.

Fallstar01

There are a number of products that are aimed at doing this.
From what I hear, the kenny brown setup is the mother of them all and it's pretty darn expensive but it's supposedly the best irs set up, bar none. It's also the only that actually replaces the upper and lower control arms (not just bushings).
Kenny Brown's website is crap and continuously under construction so you're best off searching google for more information. Here is an article I found:
http://www.allfordmustangs.com/artma...icle_383.shtml

Steeda has some kind of roll steer kit and some bushings and brakets:
http://www.steeda.com/store/-catalog/555-2155.htm
http://www.steeda.com/store/-catalog..._steer_kit.htm

Maximum Motorsports has a bunch of stuff that are all summed up in these kits: (http://www.maximummotorsports.com/giabIRS.asp

The links below currently do not have IRS setups (to the best of my knowledge) but could in the future since they are known for their live axel setups:
Griggs Racing: http://www.griggsracing.com/
Evolution motorsports: http://www.evolutionmsport.com/

v8musclecobra

Can you still run low 9 sec quarters with the stiffened irs. You do have a point that it basically is a live axel whaen you stiffen it that much...so which for the money and power, do you think id be better off with? The kenne brown seemed real good that it was also 40% lighter.

Fallstar01

From my understanding, the kenny brown owns all. I've heard that under certain sanctioned events, it doesn't qualify for some reason, (i'm paraphrasing stuff I've read elsewhere so correct me if I'm wrong people), which is why you typically hear more about live-axels tearing it up.

Lets put it this way, if I had a huge budget, I'd probably swap out my live-axel for the Kenny Brown IRS.

v8musclecobra

how expensive are they then?? i didnt see a price but this is an on going project as you all know and money is no object cause it's a project car and isn't getting done all at once.

Fallstar01

http://www.kennybrown.com/shopkb.cfm

Call Kenny and ask (317.247.5320). Be sure to post the price here for other interested folks.

jdaniel

I would like to know what the IRS brace and bushings cost from KennyBrown. I think thats the ones that my buddy got and he got it all for like $300.

v8musclecobra

called but got no answer. does anyone know if its under 3 grand for full front and back suspension.