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Old 01-31-2011, 02:44 PM   #1
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IROC REAL OR CLONE?

hey guys i am new here as i just bought a 1987 iroc on the week-end. is there anyway to verify that is a real iroc or just a z28 with the stickers on the door. the car has z28 on the dash and the side skirts and iroc on the door. the motor is a 305 4 bbl with the overdrive 4speed auto. (it is a t-roof) and has the iroc rims. but all that can be easily put on to make it look like an iroc so is there a code somewhere to verify?

thanks in advance
mike
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Old 01-31-2011, 03:19 PM   #2
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If it's an 87 and has a 4 bbl it is not an IROC. It would have to have Tuned Port Injection unless they did a swap....which would probably not have been wise for that motor/car.
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Old 01-31-2011, 03:30 PM   #3
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i believe the RPO to look for is B4Z


let me check...
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Old 01-31-2011, 03:35 PM   #4
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Loook at your arm rest under the console lid:

LG4 = Carb. L89 = TPI

The 305 TPI (RPO LB9) was optional on the Z28 (with and without the IROC-Z option).
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Old 01-31-2011, 03:39 PM   #5
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1987:

1987 IROCs used two different RPO codes--"Z28", and "B4Z". Plain Z28s will have just "Z28" in the RPO codes. IROCs will have both "Z28" and "B4Z", because "B4Z" is the RPO code for the IROC package, which was added on to the "Z28" package. For 1987, No "B4Z"=no IROC.

However, if your SPID is missing, the eighth digit of the VIN may be able to tell you what you have:

IROC Engines:

F (LB9)
H (LG4)
8 (L98)

--In 1987, if your VIN shows an "8" in the 8th position, you have an IROC, because the IROC was the only model this engine was available in.

--In 1987, if your VIN shows either "F" or "H", the VIN tells you nothing about the car's status as an IROC, because these engines were also used in other models. You will need the RPO codes from the SPID.

--The RPO code to look for in 1987 is "B4Z". For this year, No "B4Z"=No IROC.


http://www.thirdgen.org/techboard/hi...-car-iroc.html
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Last edited by toesuf94; 01-31-2011 at 03:44 PM. Reason: added link
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Old 01-31-2011, 03:45 PM   #6
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yep... look in the console for the RPO codes. for an 87 IROC, you should have both Z28 & B4Z

also, in 87, they had both Z28 & IROC badges because the IROC package was an option to add to the Z. and they didn't drop the factory carbs til 88, so you could actually have a factory motor. check the 8th digit in your VIN. if it's H, it came with the LG4 carb'd 305
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Old 01-31-2011, 06:33 PM   #7
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THANKS GUYS, I CHECKED THE CODES UNDER THE ARM REST AND IT IS STILL THE ORIGINAL ARM REST ACCORDING TO THE VIN ON THE STICKER WITH THE RPO CODES. SO IT IS ONLY A Z28 AND NOT A IROC, BUT IT IS THE `H` MOTOR CODE SO YA A CARB 305 AND AUTO TRANS IS ORIGINAL.
WHEN I WAS LOOKING AT THE RPO UNDER THE ARM REST THERE ARE LOTS OF CODES THAT ARE NOT SHOWING ON THE LIST ANY OTHER PLACE TO LOOK TO FIGURE OUT WHAT THESE CODES MEEN? ALSO IN MY VIN THE 6TH DIGIT IS `21` AND ALL I CAN FIND FOR THAT DIGIT IS `87`MEENING COUPE 2DR SPORT. THE CAR IS A T-ROOF SO MAYBE IT MEENS THAT BUT ???

Last edited by GRASSHOPPER; 01-31-2011 at 07:16 PM.
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Old 02-01-2011, 08:50 AM   #8
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http://www.chevy-camaro.com/chevy-ca....asp?year=1987

The internet is your friend. Embrace it.

Now, post some pictures of your car! I love IROCs.
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Old 02-01-2011, 09:11 AM   #9
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THANKS, THAT IS THE SAME LIST I HAVE FOUND ON THE NET ON A NOTHER SITE AND IT IS ALSO THE SAME LIST AS I HAVE IN ONE OF MY CAMARO BOOKS. I HAVE 54 MORE CODES THAT ARE NOT ON THESE LISTS, THERE WAS ONLY 22 THAT MADE THE LIST. I WAS JUST WONDERING ABOUT THE REST BUT THEY ARE PROBABLY NOT IMPORTANT ANYWAY.

I WILL SNAP SOME PICS TONIGHT, I JUST GOT MY CAMERA BACK LATE LAST NIGHT. IT IS DEFINATLY NOT AS NICE AS MOST OF THE CARS BUT HOPEFULLY IT WILL BE SOME DAY SOON.

THANKS AGAIN
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Old 02-01-2011, 10:42 AM   #10
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Here are all the possible codes: http://www.marshu.com/images-website...-car-codes.pdf
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Old 02-01-2011, 02:46 PM   #11
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YA THAT'S THE LIST I WAS LOOKING FOR. THANKS. IT IS MAINLY USELESS INFO BUT MY CURIOSITY IS CURED
I'LL TRY TO LOAD SOME PICS OF MY YELLOW (NON IROC) Z28
IT DID CODE THAT THE CAR WAS ORIGINALY RED SO IT WAS WORTH LOOKING AT
AGAIN THANKS, MIKE
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Old 02-01-2011, 02:57 PM   #12
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Caps lock is your friend when you turn it off. Nice car.
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Old 02-01-2011, 05:14 PM   #13
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sorry about the caps, i have to leave them on when i`m at work for use in my other systems and always forget about typing to other people using them. my wife yells at me all the time about it. i am having trouble with my camera so i`ll post pics when i can
mike
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Old 02-01-2011, 05:21 PM   #14
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Quote:
Originally Posted by GRASSHOPPER View Post
sorry about the caps, i have to leave them on when i`m at work for use in my other systems and always forget about typing to other people using them. my wife yells at me all the time about it. i am having trouble with my camera so i`ll post pics when i can
mike
No problem. Can't wait to see some pics. Love the third gens.
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