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Old 07-19-2015, 01:56 AM   #1
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Opinions on a Cobra IRS in a 2000 GT

2000 GT

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Old 07-19-2015, 07:27 AM   #2
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We need some more info. Is cost a factor? What do you use the car for? And what all have you done to the car so far?


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Old 07-19-2015, 03:15 PM   #3
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I did it in mine. It honestly wasn't anything special other than being able to say that I had one and i was able yo adjust my rear toe and canber. My car was low enough that I didn't gain any smooth ride benefits from the swap. The exhaust did look cool. If you're looking at it for performance reasons then just remember you're adding close to 200lbs to the back of the car.

Install isn't terrible, took me all day to install because I was sharing my tools with the guy getting my SRA. The 03/04 has carbon fiber differential clutch packs and possibly bigger half shafts (can't remember). If you find an 03/04 IRS you're gonna need to buy a hybrid u-joint and a Cobra driveshaft flange to mate up to the differentuap, or you'll need to buy a new GT differential flange and crush collar to mate up to the GT driveshaft.

If you ever plan on doing a gear swap it would be best to do that while everything is out because the differential carrier needs to be removed in order to replace the gears. Also make sure to change your fuel filter while everything is out. The placement of the IRS subframe makes it tough to reach the fuel filter so future replacement is not gonna be easy.
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Old 07-19-2015, 06:25 PM   #4
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Here's my problem. This is on my new project. Ineed opinions on it because someone has already put one In. I find know what direction to go with the car now.

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Old 07-19-2015, 06:55 PM   #5
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It is by no means a bad thing to have one, they're different and cool to have
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Old 07-19-2015, 07:26 PM   #6
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If it is already in, then cool! Now you should just look at what you want the car to do. You drag racing? Autocross?
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Old 07-19-2015, 07:36 PM   #7
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Thanks mile high. Yea they put it in right. The problem I'm having is finding outer a arm bushings.

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Old 07-19-2015, 08:02 PM   #8
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I would look at full tilt boogie racing. They have a great kit that eliminates almost all wheelhouse and might have the control arm bushings you need.
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Old 07-19-2015, 10:24 PM   #9
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Thanks.

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Old 07-19-2015, 10:34 PM   #10
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Not a problem. I'm also curious like Panther is about what you plan on doing with the car
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Old 07-19-2015, 10:41 PM   #11
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Haven't made up my mind. I'm starting with suspension. The guy I got it from lives on a gravel road, so every bushing is trashed. It has 104,000 original miles. She has a long way to go but I'm going from suspension to cosmetics. It well always be a daily driver. I want it to handle like a dream.

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Old 07-20-2015, 09:21 AM   #12
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If it's got irs already then that's not a bad thing. You've got it, run with it. Your on the right track. Definitely get all those bushing replaced. It will make a would of difference. I agree with the exhaust, it really does look much better with the irs imho.


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Old 07-20-2015, 12:54 PM   #13
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All out handling, probably the IRS. 1/4 mile racing, SRA.

As far as adding weight, the IRS does add a chunk to the car... but its only about 40lbs or so more than the SRA with the Torque Arm/PHB setup so its not crazy. Also it adds the weight to the *** of the car on a platform that is nose heavy so its not nearly as bad as putting 200lbs onto the nose.
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Old 07-20-2015, 01:42 PM   #14
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Thanks scotty. This can probably will never 1/4. I'm wanting to build it where it's fun to drive. Handling is what's important to me.

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Old 07-20-2015, 01:52 PM   #15
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Then I'd drop it out this winter and install the entire Full Tilt Boogie setup into it. I think he also has the bushings you need and if not I'm sure he could tell you where to get them.

I almost bought a 95 GT that had full suspension, termi T56 and an IRS but it was a stock motor and like 160k miles on the body... Still think about that car sometimes.
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Old 07-20-2015, 02:10 PM   #16
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Yea someone else mentioned full tilt and when I looked it up I already had their site book marked. They sell a at of all four of the outer with the tool for removal and install for $300.

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Old 07-20-2015, 08:18 PM   #17
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Just to throw it out there, is it not a good idea to drag with irs. All I've ever had was sra.

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Old 07-20-2015, 08:58 PM   #18
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If you are drag racing then keep the SRA. Honestly there are so many setups right now for the SRA for handling as well. It really is debatable which one is better. Max Motorsports seems to think the IRS is superior, Griggs and Steeda and a few others go with modified SRAs. Griggs has a whole Watt's setup and Steeda has what is called a "5 link".
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Old 07-20-2015, 10:09 PM   #19
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Quote:
Originally Posted by scottydsntknow View Post
If you are drag racing then keep the SRA. Honestly there are so many setups right now for the SRA for handling as well. It really is debatable which one is better. Max Motorsports seems to think the IRS is superior, Griggs and Steeda and a few others go with modified SRAs. Griggs has a whole Watt's setup and Steeda has what is called a "5 link".
Leave it up to steeda to have a five link lol

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Old 07-20-2015, 10:15 PM   #20
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I've actually been researching it a lot since I have a real Steeda car. I thought it would be some crazy *** gimmicky thing but it actually is a really good setup from everything I'm reading. If I stick with the SRA I will probably go that route mainly because I have a Steeda car and its cool to buck the trend sometimes.


As for the IRS though, which was the original topic. It can be made into a really really good unit as I said before. Its a real SLA (short long arm) setup for the rear and has been out since 1999 so companies like FTBR have had a loooong time to figure out what needs to be fixed and how best to do it.
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Old 07-21-2015, 11:54 AM   #21
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What is suspension difference in the front? Will a cobra spring kit work in the front?

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