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IRS from caddy on camaro?

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Old 03-15-2008, 07:39 AM
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Default IRS from caddy on camaro?

I may be totally off, and just stupid for asking this - but has anyone ever took the IRS from the cts-v and put it on a f-body?
Old 03-15-2008, 08:57 AM
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LOL, interesting idea. Undertake an extensive fabrication project to install an IRS that would give the F-body about the only rear axle setup out there that is weaker than the 10-bolt. Venture to the Caddilac CTS-V section and feast your eyes on the nightmare those guys n gals are enduring with the diff on those things.

Not a stupid idea, just kinda unresearched.
Old 03-15-2008, 09:01 AM
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so what is the benifit of the IRS? I've never even rode in a car with that type of setup, didnt know what the big deal was?
Old 03-15-2008, 09:02 AM
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and my main reason for asking was i have access to a junked out cts with the IRS and i can get it by trading some junk outta my garage for it just didnt know if it would be worth the effort.
Old 03-15-2008, 10:01 AM
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Originally Posted by Awake455
LOL, interesting idea. Undertake an extensive fabrication project to install an IRS that would give the F-body about the only rear axle setup out there that is weaker than the 10-bolt. Venture to the Caddilac CTS-V section and feast your eyes on the nightmare those guys n gals are enduring with the diff on those things.

Not a stupid idea, just kinda unresearched.

Here is your anwser. It would be unique, but a huge waste of time & money.
Old 03-15-2008, 10:06 AM
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isnt a vette IRS? what about from a vette?
Old 03-15-2008, 10:17 AM
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The IRS rears are gonna be weaker no matter what. If you have a f-body you need to just go 12-bolt, 9" or Dana 60. Plain and simple. Anything else is gonna be weaker.
Old 03-15-2008, 10:19 AM
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if it can be had for cheap get it and ebay/craigslist it
Old 03-15-2008, 11:09 AM
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i just didnt know if they were stronger/better for some reason, didnt know why they are on a vette if it's not the best?!?
Old 03-15-2008, 11:19 AM
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IRS is good if you want to go around a lot of corners. If you're road racing or auto-xing the car it's something to look into.

But if you want any power to go through it or you want to go fast in a straight line, ditch it.
Old 03-15-2008, 11:36 AM
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thanks! my car is a straight line car so i guess a 9r will be the answer
Old 03-15-2008, 11:41 AM
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Not likely to see a net positive return on your time/money investment into an IRS for a straightliner.

A properly tuned 4th gen rear suspension is extremely capable at a road course or autox. It would come down to how much time and money you are willing to spend to be different. The lion's share of your efforts would be spent in getting it back to the level of a properly tweaked F-body solid axle setup.

The question becomes...do you want to go thru a great deal of fabrication, installation, and tuning of an IRS to achieve what can be done with the existing suspension? I'm pretty sure that, once someone successfully gets the thing installed and tuned, it could be made to outperform the solid axle torque arm panhard rod F body setup. The road between here and there is quite long and involved though.

Do another search on here, you will find an example of a member who has installed a (IIRC) C4 IRS.
Old 03-15-2008, 12:11 PM
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awesome - thanks man! I dont have the time or patience to go that indepth - it was just an idea that crossed that i thought i would throw out there - thanks
Old 03-15-2008, 07:54 PM
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Here's the link to a shop that installed a C4 IRS.

https://ls1tech.com/forums/gears-axles/539526-4th-gen-irs-f-body-larger-pics.html
Old 03-16-2008, 07:42 AM
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Ive seen a IRS in a fbody. If I were auto crossing it be something id consider.



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