89 Iroc for sure?
10-30-2005, 06:46 PM
#1
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Car: 1989 IROC-Z
Engine: 383 Stroker TPI
Transmission: T-56
89 Iroc for sure?
okay. I need to know this once and for all. I just bought an '89 IROC. 5 speed. 305 TBI E vin. door jam says Production Date 12/88. I've had 4 people now tell me this is impossible to have. when it's right there in plain view. I need proof from the experts here. by the way this thing is bare minimum. no power windows or power locks. yet has power trunk. what do you guys think?
10-30-2005, 07:00 PM
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Car: 1987 GTA
Engine: LT1
Transmission: T56
Axle/Gears: 9 bolt 3.70 posi
Only true way is to check the I want to say 3rd digit in the VIN which will tell you which year it is. The only other way is to check the RPO code B4Z as well.
10-30-2005, 07:02 PM
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Car: 1989 IROC-Z
Engine: 383 Stroker TPI
Transmission: T-56
yeah thats a good point. next time I'm at the shop I'll check it out. I just think that it's an awful lot of work to clone a normal *** camaro into an IROC. I mean it's got the full IROC suspension package and all so. yup. any other input would be awesome though 
10-30-2005, 07:04 PM
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Car: 1987 GTA
Engine: LT1
Transmission: T56
Axle/Gears: 9 bolt 3.70 posi
But I don't know what the big deal is, they made an '89 Iroc with the 305 TBI with the 5 speed, dunno why anyone is saying it isn't one.
10-30-2005, 07:19 PM
#6
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Just a few corrections....
A 1989 IROC-Z will not have RPO Code B4Z. B4Z was an option package on the 85-87 Z28, since the Z28 and the IROC-Z were both available. In 1988, the only Z28 available was the IROC-Z so there was no need for the B4Z code. You will only have Z28 in 88-90.
The tenth digit is the model year, not the 3rd. You should have a "K"
A 1989 IROC-Z will not have RPO Code B4Z. B4Z was an option package on the 85-87 Z28, since the Z28 and the IROC-Z were both available. In 1988, the only Z28 available was the IROC-Z so there was no need for the B4Z code. You will only have Z28 in 88-90.
The tenth digit is the model year, not the 3rd. You should have a "K"
10-30-2005, 07:21 PM
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Car: 1987 GTA
Engine: LT1
Transmission: T56
Axle/Gears: 9 bolt 3.70 posi
Geeez....I can't remember crap tonight for things.... maybe it's all the gas I ended up being around pulling the tank on my GTA tonight. 6 year old stale gas...yum 
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10-31-2005, 08:50 AM
#8
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Join Date: Mar 2001
Location: Doghouse ······································ Car: 1989 Formula 350 Vert Engine: 350 L98 Transmission: 700R4 Axle/Gears: B&W 3.27
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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
1) Tell those 4 people they do not know Jack. Go get to know him.
2) the LO3 to my knowledge was the base engine on the IROC/Z28 in 1989.
3) the date 12/88 indicates that the car was made in December of 1988. Since production of the model year preceeds the next physical year by a few months, its not uncommon for an 89 car to be made in 1988.
4) 10th didget of your VIn should have a "K" for 89 and "J" for 1988
Your vin should read:
1G1FP21E_KL1_ _ _ _ _
John
2) the LO3 to my knowledge was the base engine on the IROC/Z28 in 1989.
3) the date 12/88 indicates that the car was made in December of 1988. Since production of the model year preceeds the next physical year by a few months, its not uncommon for an 89 car to be made in 1988.
4) 10th didget of your VIn should have a "K" for 89 and "J" for 1988
Your vin should read:
1G1FP21E_KL1_ _ _ _ _
John
Last edited by okfoz; 10-31-2005 at 08:54 AM.
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