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Old 06-02-2014, 10:45 AM   #1
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Cobra IRS

Is it worth keeping? Have a day off and finally got to toy with my Mustang. I see that I have cobra irs, cobra exhaust, etc. Has 3.73 as well. What's the different from the solid to this?
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Old 06-02-2014, 11:21 AM   #2
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Cobra IRS

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Is it worth keeping? Have a day off and finally got to toy with my Mustang. I see that I have cobra irs, cobra exhaust, etc. Has 3.73 as well. What's the different from the solid to this?

Irs is a better ride and better road course suspension. Solid is better for drag racing and weighs less than the irs. IMO I wouldn't bother swapping It. Not worth the trouble
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Old 06-02-2014, 11:22 AM   #3
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Irs is a better ride and better road course suspension. Solid is better for drag racing and weighs less than the irs. IMO I wouldn't bother swapping It. Not worth the trouble

Better ride as in I won't feel bumps as much as on the solid? It feels way different compare to the solid.
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Old 06-02-2014, 11:23 AM   #4
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Better ride as in I won't feel bumps as much as on the solid? It feels way different compare to the solid.

I would assume for. I personally don't have experience with it and have seen countless threads saying that it's a better ride, and a better road course performer.
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Old 06-02-2014, 11:25 AM   #5
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I would assume for. I personally don't have experience with it and have seen countless threads saying that it's a better ride, and a better road course performer.

Alright, question. So when I'm driving 60+ and switching lanes it feels floaty? Feels like I'm floating over. Is that normal? Or bad suspension component?
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Old 06-02-2014, 11:26 AM   #6
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Alright, question. So when I'm driving 60+ and switching lanes it feels floaty? Feels like I'm floating over. Is that normal? Or bad suspension component?

as in it feels unsafe? Or just feels nice and smooth?
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Old 06-02-2014, 11:27 AM   #7
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Cobra IRS

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as in it feels unsafe? Or just feels nice and smooth?

Unsafe.


Edited/ just got it checked out and everything is good. Tie rods, alignment, control arms etc. Probably not use to the irs.
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Old 06-02-2014, 12:47 PM   #8
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Still doesn't feel right. Feels loose. 60 mph or higher feels like I'm floating? Like I'm going to loose control but I don't. No vibration. New tires in rear, tires in front are old.
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Old 06-02-2014, 12:50 PM   #9
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Still doesn't feel right. Feels loose. 60 mph or higher feels like I'm floating? Like I'm going to loose control but I don't. No vibration. New tires in rear, tires in front are old.

It probably feels lose because it's made like that. I would assume that is why it's better for the track. It is loose enough to move with bumps and obstacles
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Old 06-02-2014, 12:52 PM   #10
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If that's true then I want the solid 8.8 rear back, lol.
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Old 06-02-2014, 12:58 PM   #11
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Yeah, I mean the solid rear is pretty ancient though which is why it probably felt so much more clunky, and bumpy. Not as smooth. Good to plant power on the track though. All about what you want, but IMO it's not worth spending the cash to trade back
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Old 06-02-2014, 01:30 PM   #12
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Probably the rubber bushings in the thing on the way out. Brand new they are not optimal at all, as they age it gets bad. There is a really good bushing kit from Full Tilt Boogie Racing that addresses just about every issue with the IRS but its $700 and you need to drop the rear out to install it. Still, once done its probably the best riding rear setup as far as street driving.

Ppl love or hate the IRS but it has proven better for road courses. No matter what a watt's link SRA does, it still can't fix the issues caused if one tire goes over a burm and tweaks the whole axle vs the IRS where the outside tire stays planted while the inside one rides up on its own.
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Old 06-02-2014, 01:36 PM   #13
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Could the tires also cause floaty ride? The inside of my tires look caved in. Click image for larger version

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Those 2 first are driver front and the 3rd pic is passenger front. Click image for larger version

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Old 06-02-2014, 02:20 PM   #14
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That's inner camber wear from being lowered without C/C plates. How are your shocks and struts? Those may cause a floating issue if they're going out.
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Old 06-02-2014, 06:53 PM   #15
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How much you think it's lowered?
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Old 06-02-2014, 07:00 PM   #16
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Probably 1.5-1.7what color are the springs?
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Old 06-02-2014, 07:02 PM   #17
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Looks like a 1.25 or 1.5" drop. If you are lowered without CC plates you are going to need said plates and new tires too. At least up front. Also, with the IRS you need to have your rear aligned too, not just the front.
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Old 06-02-2014, 07:05 PM   #18
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Springs are black. And I should go with MM plates?
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Old 06-02-2014, 07:13 PM   #19
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Always go with the MM plates.
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Old 06-02-2014, 07:14 PM   #20
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Always go with the MM plates.

Plates will fix my wear on tires and probably make it drive better? Or will it always feel floaty?
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Old 06-02-2014, 07:22 PM   #21
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Well getting your front suspension dialed in is a good start. It will keep your tires from wearing any more than they already are but you probably should replace them.
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Old 06-03-2014, 02:57 PM   #22
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Well getting your front suspension dialed in is a good start. It will keep your tires from wearing any more than they already are but you probably should replace them.

Already ordered new tires. I'll order mm plate when payday comes. Could I install the mm plates in my drive way or should I take it to a shop? Also if I get the rear end align then that should fix my main concern of that floaty feel/loose control feel?
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Old 06-03-2014, 05:22 PM   #23
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Well it might but if you have the stock rubber bushings in there... dunno. You can install your CC plates yourself if you have tools, its not too hard.
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Old 06-03-2014, 06:12 PM   #24
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My car doesn't float at all and I'm on stock bushings. How are your shocks and struts?
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Old 06-03-2014, 06:37 PM   #25
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My car doesn't float at all and I'm on stock bushings. How are your shocks and struts?

Going to get my rear end align tomorrow. How do I tell if my shocks/struts are bad?
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Old 06-03-2014, 06:47 PM   #26
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Going to get my rear end align tomorrow. How do I tell if my shocks/struts are bad?
Does the car bounce a lot when you go over bumps? Push down on the front of the car a couple times and see how long it takes to stop bouncing.
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Old 06-03-2014, 07:21 PM   #27
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Does the car bounce a lot when you go over bumps? Push down on the front of the car a couple times and see how long it takes to stop bouncing.

Feels stiff going over bumps. I'll double check when I get home.
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Old 06-03-2014, 08:45 PM   #28
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Feels stiff when I push the front and the rear I can push down. Comes up pretty quick
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Old 06-03-2014, 11:08 PM   #29
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I guess I should say the goal is to try to get the car bouncing and see how long it takes to stop. But I doubt that's what it is.
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Old 06-03-2014, 11:15 PM   #30
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I don't think it's the Shocks/Struts. You think cause it's lowered it's doing that? Or the Rear Alignment.
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Old 06-04-2014, 04:27 PM   #31
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Old 06-04-2014, 05:03 PM   #32
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Damn that tire is ****ed. You're pretty lucky it didn't blow out on you. Looks like you have Cobra Bilstein shocks too
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Old 06-04-2014, 05:04 PM   #33
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Damn that tire is ****ed. You're pretty lucky it didn't blow out on you. Looks like you have Cobra Bilstein shocks too


Think that floaty feel is because it's lowered without cc plates? It's the front that's floaty.
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Old 06-04-2014, 05:58 PM   #34
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No it shouldn't be that. Mine is lower than that without C/C plates and doesn't feel floaty at all. Did you get those tires replaced?
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Old 06-04-2014, 10:47 PM   #35
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No it shouldn't be that. Mine is lower than that without C/C plates and doesn't feel floaty at all. Did you get those tires replaced?
Thinking those tires are the reason why? Left it at the shop. Picking it up tomorrow morning.
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