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So what makes this '89 IROC-Z so cool?

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Old May 1, 2015 | 06:11 PM
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From: Chicagoland
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
So what makes this '89 IROC-Z so cool?

Low miles, '89 IROC, peanut cammed LB9, single cat exhaust, 2.73 posi, rear drums, base 15x7" IROC wheels. Nice car, other than the paint needing a big detail, this car is a real creampuff.

But what makes it so cool? It's wearing the repro 225/60/16 Gatorbacks that were brought back for the Mustang. So nice to see NEW Gatorbacks on a 3rd gen, even if they weren't the factory size.
http://www.ebay.com/itm/291446046491?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT


Last edited by chazman; May 1, 2015 at 07:47 PM.
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Old May 1, 2015 | 08:25 PM
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From: Chicagoland
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: So what makes this '89 IROC-Z so cool?

BTW, the rest of the car is really nice as well, if you go through the dozens of photos in the listing, this car is fairly representative of how dealer ordered IROC-Zs were equipped back in the day.

Last edited by chazman; May 1, 2015 at 09:57 PM.
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Old May 1, 2015 | 11:14 PM
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From: Imperial, Missouri
Car: 89 IROC/89 Vert/87 Vert/89 GTA Vert
Engine: 5.7/5.0/5.0/5.7
Transmission: 700R4
Axle/Gears: 9" 2.77/9" 3:23/9" 3:42
Re: So what makes this '89 IROC-Z so cool?

Are they still making those?
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Old May 1, 2015 | 11:24 PM
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Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: So what makes this '89 IROC-Z so cool?

Originally Posted by rarebmx
Are they still making those?
I checked Kelsey Tire and they no longer have them listed. I know they did a run of them in 225/60/15 in 2012.
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Old May 2, 2015 | 07:35 AM
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Car: 1987 IROC Original Owner
Engine: LB9
Transmission: M39 MM5
Axle/Gears: G80 G92 J65
Re: So what makes this '89 IROC-Z so cool?

I love the black with the blue stripe - the IROC-Z further back on the door was a nice change for 88 as well.

Do they have any idea how many of those tires they would sell if they made them? Damn!
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Old May 2, 2015 | 10:46 AM
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Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: So what makes this '89 IROC-Z so cool?

Originally Posted by PurelyPMD
I love the black with the blue stripe - the IROC-Z further back on the door was a nice change for 88 as well.

Do they have any idea how many of those tires they would sell if they made them? Damn!
Supposedly they've been working on a 245/50/16 version for the 3rd gen, but no word on it's release.
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Old May 4, 2015 | 09:00 AM
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From: Chicagoland
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: So what makes this '89 IROC-Z so cool?

Apparently Kelsey is doing another run of the 225/60/15 Gatorbacks in a couple of weeks. Nothing on the 245/50/16s.
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Old May 4, 2015 | 09:58 AM
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From: Newtown, CT
Car: 1987 IROC Original Owner
Engine: LB9
Transmission: M39 MM5
Axle/Gears: G80 G92 J65
Re: So what makes this '89 IROC-Z so cool?

Originally Posted by chazman
Apparently Kelsey is doing another run of the 225/60/15 Gatorbacks in a couple of weeks. Nothing on the 245/50/16s.
15's or 16's?

There is almost no difference in size between the two.
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Old May 4, 2015 | 10:00 AM
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From: Chicagoland
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: So what makes this '89 IROC-Z so cool?

Originally Posted by PurelyPMD
15's or 16's?

There is almost no difference in size between the two.
15s. The repro tires made for the Mustang and the ones this IROC-Z is wearing on it's base 15x7 wheels.
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Old May 4, 2015 | 10:20 AM
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From: Newtown, CT
Car: 1987 IROC Original Owner
Engine: LB9
Transmission: M39 MM5
Axle/Gears: G80 G92 J65
Re: So what makes this '89 IROC-Z so cool?

Originally Posted by chazman
15s. The repro tires made for the Mustang and the ones this IROC-Z is wearing on it's base 15x7 wheels.

Chaz, aren't those the 16 x 8" wheels, not the base 15's.

Last edited by PurelyPMD; May 4, 2015 at 10:23 AM.
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Old May 4, 2015 | 11:04 AM
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From: Chicagoland
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: So what makes this '89 IROC-Z so cool?

Originally Posted by PurelyPMD
Chaz, aren't those the 16 x 8" wheels, not the base 15's.
No, those are the base 15x7 IROC wheels which look identical to the 16x8s, except for the size.
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Old May 4, 2015 | 11:47 AM
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From: Huntsville AL
Car: 88GTA
Engine: 5.7TPI
Transmission: Auto
Axle/Gears: 3.27
Re: So what makes this '89 IROC-Z so cool?

Originally Posted by chazman
Apparently Kelsey is doing another run of the 225/60/15 Gatorbacks in a couple of weeks. Nothing on the 245/50/16s.
I would buy 3 sets (12) right now if they did em!
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Old May 4, 2015 | 12:06 PM
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From: Chicagoland
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: So what makes this '89 IROC-Z so cool?

Originally Posted by Bob88GTA
I would buy 3 sets (12) right now if they did em!
I'd be in for 2 sets right now as well. I have no idea why they just don't release them. They've had the 245/50/16 size in the pipeline for years. And I'm pretty confident they'd sell more of those to us, than they have the 225/60/15s to Mustang guys.
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Old May 4, 2015 | 12:15 PM
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From: Huntsville AL
Car: 88GTA
Engine: 5.7TPI
Transmission: Auto
Axle/Gears: 3.27
Re: So what makes this '89 IROC-Z so cool?

Originally Posted by chazman
I'd be in for 2 sets right now as well. I have no idea why they just don't release them. They've had the 245/50/16 size in the pipeline for years. And I'm pretty confident they'd sell more of those to us, than they have the 225/60/15s to Mustang guys.

I hear ya. Now if we needed 22's or 24's, the options would be ENDLESS!
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Old May 4, 2015 | 03:06 PM
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From: Doghouse ······································ Car: 1989 Formula 350 Vert Engine: 350 L98 Transmission: 700R4 Axle/Gears: B&W 3.27
Car: 87 Formula T-Top, 87 Formula HT
Engine: 5.1L TPI, 5.0L TPI
Transmission: 700R4, M5
Axle/Gears: Sag 3.73, B&W 3.45
Re: So what makes this '89 IROC-Z so cool?

Originally Posted by Bob88GTA
I hear ya. Now if we needed 22's or 24's, the options would be ENDLESS!
No kidding... Even 17" is easy to come by...

John
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Old May 4, 2015 | 03:34 PM
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From: Chicagoland
Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: So what makes this '89 IROC-Z so cool?

I spoke to smallhurst from this thread several years ago. https://www.thirdgen.org/forums/hist...l-offered.html

Back then, he said they were looking for original tires to use as patterns and I told him that I had a 10K mile set off my '89 sitting in my attic. I believe that they have since sourced some original tires to use as patterns. I have no idea what the delay is about. I certainly don't know why they'd come out with a 225/60/15 version and 3+ years later not have them in our size.
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Old May 10, 2015 | 11:16 PM
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Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: So what makes this '89 IROC-Z so cool?

Sold for $8800. Sweet car.
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