thunderbird supercoupe irs

jayem · #1 (**permalink**) 10-15-2002, 02:28 PM

I am considering switching out my 9 inch rear end wirh an 8.8
supercoupe irs. I am running a supercharged 289, 375 horse,
425 lbs torque. Will the irs handle the torque. How have the 8.8
irs units held up in cobras. Thanks for your input. Jay.

Mr.Fixit · #2 (**permalink**) 10-15-2002, 02:56 PM

They handle it fine. Just don't put on some drag slicks and try and launch the car at 7000rpm. SPF puts them in their cars, and there are a bunch of SPF's with lots more torque and no diff problems. But why switch anyway?

Cobrabill · #3 (**permalink**) 10-15-2002, 03:29 PM

I up-graded to an Auburn Pro carrier in my 8.8 and have had no worries.

jayem · #4 (**permalink**) 10-15-2002, 03:54 PM

3 reasons for the switch:
#1. I need a winter project.
#2. I auto cross the car & believe the irs will perform better.
#3. I found a complete irs for $500 dollars & should be able
to sell the 9 inch disc. with posi for more.

Mr.Fixit · #5 (**permalink**) 10-15-2002, 05:53 PM

I have never seen an LAE or B&B with IRS. is it supposed to be a drop in assembly? The cost of modifying the frame to accept: A-arms out back, hang the center section, and everything else will be a huge pain, but you said you needed a project. What did you get with the "complete irs for $500"

Excaliber · #6 (**permalink**) 10-15-2002, 08:53 PM

I like reason number 2. You are starting a poll aren't you? LOL

Ernie

aeon · #7 (**permalink**) 10-15-2002, 10:46 PM

i would love to see pics of it when your done as mine is the same as yours and we all need winter projects : )

aeon

jayem · #8 (**permalink**) 10-16-2002, 08:37 AM

I'm checking to make sure the irs hub to hub length is the same as the 9 inch. To shorten or lengthen the irs would be spendy.
The irs I've looked at is a 1992, 327 gears with posi. The unit is
100 percent complete. I actually think the install wil be easy. A wire feed welder & some custom brackets. I will keep you posted. Jay