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My restored IROC with some Vette friends

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Old Oct 14, 2019 | 12:06 PM
  #1  
rudolphschenker's Avatar
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From: Utah
Car: 1990 IROC Z, 1987 IROC Z, 1986 Fir
Engine: 350
Transmission: 700r4
Axle/Gears: 3.73
My restored IROC with some Vette friends





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Old Oct 14, 2019 | 01:03 PM
  #2  
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Transmission: 700R4
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Re: My restored IROC with some Vette friends

Great trio of cars there!
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Old Oct 14, 2019 | 07:21 PM
  #3  
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Car: 1986 Camaro Drag Car
Engine: 383 on Ethanol
Transmission: Automatic
Axle/Gears: 4.86 Currie 9 inch
Re: My restored IROC with some Vette friends

Nice cars!! The black and gold IROC'S are my all time favorites! Same goes for Admiral Blue as far as C4 Vettes go....
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Old Oct 14, 2019 | 08:47 PM
  #4  
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Re: My restored IROC with some Vette friends

I’m diggin the louvers...
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Old Oct 19, 2019 | 11:40 PM
  #5  
Jenkins's Avatar
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From: The Desert
Car: 1984 Trans Am
Engine: Lg4
Transmission: 700R4
Axle/Gears: 3:23
Re: My restored IROC with some Vette friends

I’m diggin the ZR1...
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Old Oct 20, 2019 | 09:51 AM
  #6  
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From: New England
Car: 1988 IROC Z Convertible
Engine: 305 TPI (LB9)
Transmission: 700 R4
Axle/Gears: G80 GU2
Re: My restored IROC with some Vette friends

Wow... admiral blue ZR1! Nice...

Black and Gold IROC too... nice looking cars
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Old Oct 20, 2019 | 12:49 PM
  #7  
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Car: 89 GTA ASC Conv., Prev: 89 GTA 6.3L
Engine: 5.7L L98 TPI
Transmission: 700r4 Automatic
Axle/Gears: 3.27:1 w/ JG1 Options:B2L, N10, U1A
Re: My restored IROC with some Vette friends

The blue Corvette looks good, but the C5, not really a fan of the bloated bubbles.

Last edited by Big&BadGTA; Oct 20, 2019 at 03:40 PM.
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Old Oct 20, 2019 | 02:41 PM
  #8  
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Car: 1988 Pontiac Trans Am GTA
Engine: 5.7 liter V-8
Transmission: 4 speed auto
Re: My restored IROC with some Vette friends

Great pics, great cars. And loving that background. Looks like you live in a very beautiful area of Utah.
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Old Oct 20, 2019 | 03:12 PM
  #9  
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Re: My restored IROC with some Vette friends

The cars look good. But please adjust those fog lights on the IROC.
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Old Oct 21, 2019 | 12:12 PM
  #10  
rudolphschenker's Avatar
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From: Utah
Car: 1990 IROC Z, 1987 IROC Z, 1986 Fir
Engine: 350
Transmission: 700r4
Axle/Gears: 3.73
Re: My restored IROC with some Vette friends

Will do!! Fog lights are a bit droopy
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Old Oct 21, 2019 | 12:16 PM
  #11  
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From: Utah
Car: 1990 IROC Z, 1987 IROC Z, 1986 Fir
Engine: 350
Transmission: 700r4
Axle/Gears: 3.73
Re: My restored IROC with some Vette friends

The C5 is the quickest. Maggie breaks the wheels loose easily

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Old Oct 21, 2019 | 02:36 PM
  #12  
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Car: 1991 Z28 Vert
Engine: 383 single plane efi
Transmission: T-56
Axle/Gears: 8.8 with 3.73s
Re: My restored IROC with some Vette friends

I still would take the blue C4 over the C5.
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Old Oct 21, 2019 | 02:36 PM
  #13  
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From: South Ms
Car: 89 Firebird
Engine: 355 TBI
Transmission: 700R4
Axle/Gears: 10 Bolt.Posi-3.73s
Re: My restored IROC with some Vette friends

Ive always been a fool about that engine in the ZR1 !
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Old Oct 31, 2019 | 05:00 PM
  #14  
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From: Lansdale, PA
Car: 1991 Corvette
Engine: 383 TPI
Transmission: 700R4
Axle/Gears: D44 3.33 gears
Re: My restored IROC with some Vette friends

Originally Posted by Tibo
I still would take the blue C4 over the C5.

Absolutely, although I wish he had the right offset wheels in the back.
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Old Nov 1, 2019 | 01:29 PM
  #15  
rudolphschenker's Avatar
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Joined: Sep 2012
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From: Utah
Car: 1990 IROC Z, 1987 IROC Z, 1986 Fir
Engine: 350
Transmission: 700r4
Axle/Gears: 3.73
Re: My restored IROC with some Vette friends

Originally Posted by TPIVette
Absolutely, although I wish he had the right offset wheels in the back.
AB ZR1 is special for sure. Wheels are the Fikse FM5. I still have the original A-molds, but prefer the look of the FM5. Didn't know the offset was incorrect??
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Old Nov 2, 2019 | 07:48 AM
  #16  
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From: Lansdale, PA
Car: 1991 Corvette
Engine: 383 TPI
Transmission: 700R4
Axle/Gears: D44 3.33 gears
Re: My restored IROC with some Vette friends

[QUOTE=rudolphschenker;6335044]


Originally Posted by rudolphschenker
AB ZR1 is special for sure. Wheels are the Fikse FM5. I still have the original A-molds, but prefer the look of the FM5. Didn't know the offset was incorrect??
Fikse FM5s are beautiful and my favorite wheel for a C4, but your rear wheels sit pretty far inboard. I'd guess they were probably made for a regular C4?
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Old Nov 2, 2019 | 11:32 AM
  #17  
rudolphschenker's Avatar
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Joined: Sep 2012
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From: Utah
Car: 1990 IROC Z, 1987 IROC Z, 1986 Fir
Engine: 350
Transmission: 700r4
Axle/Gears: 3.73
Re: My restored IROC with some Vette friends

Hmmmmmmm.... previous owner had the Fikse's on. I think the correct ZR1 offset is +50 on the front and +43 on the rear for the FM5. Regular C4 offset is more shallow. I'll take a closer look
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Old Nov 2, 2019 | 02:22 PM
  #18  
TPIVette's Avatar
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From: Lansdale, PA
Car: 1991 Corvette
Engine: 383 TPI
Transmission: 700R4
Axle/Gears: D44 3.33 gears
Re: My restored IROC with some Vette friends

Originally Posted by rudolphschenker
Hmmmmmmm.... previous owner had the Fikse's on. I think the correct ZR1 offset is +50 on the front and +43 on the rear for the FM5. Regular C4 offset is more shallow. I'll take a closer look

50mm is the offset for the 17x11 A-mold that came on the 96 Grand Sports. 36mm is the offset for the 17x11s on ZR1. Either wheel will bolt on either car, but a 50mm wheel on a ZR1 will sit inboard and a 36mm wheel will poke out considerably on a standard with C4.

This is a 50mm 17x11 on the rear of my standard C4. This wheel would sit about an inch inboard on your ZR1.


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Old Nov 2, 2019 | 04:49 PM
  #19  
rudolphschenker's Avatar
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Joined: Sep 2012
Posts: 56
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From: Utah
Car: 1990 IROC Z, 1987 IROC Z, 1986 Fir
Engine: 350
Transmission: 700r4
Axle/Gears: 3.73
Re: My restored IROC with some Vette friends

I will check the offset. I suspect it's ok, however now that you mentioned it, I'm curious.



Last edited by rudolphschenker; Nov 2, 2019 at 05:26 PM.
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Old Nov 3, 2019 | 10:34 AM
  #20  
TPIVette's Avatar
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From: Lansdale, PA
Car: 1991 Corvette
Engine: 383 TPI
Transmission: 700R4
Axle/Gears: D44 3.33 gears
Re: My restored IROC with some Vette friends

Originally Posted by rudolphschenker
I will check the offset. I suspect it's ok, however now that you mentioned it, I'm curious.
If you still have your A-Molds, bolt one on the back and compare it to the Fikse.
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Old Nov 3, 2019 | 11:21 AM
  #21  
rudolphschenker's Avatar
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Joined: Sep 2012
Posts: 56
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From: Utah
Car: 1990 IROC Z, 1987 IROC Z, 1986 Fir
Engine: 350
Transmission: 700r4
Axle/Gears: 3.73
Re: My restored IROC with some Vette friends

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