IROCThe5.7L

Hi guys,

Interesting debate came up on a FB group and I can't find much information on it. Could you get a 88-89 IROC-Z, with t tops, L98 and G92? Someone was claiming you could not get a L98 with t tops and G92. Only G80. And I can't find much

Thanks!

dagwood

iTrader: (5)

I believe you could. I may be wrong, though...

ray jr

iTrader: (2)

i just pulled up 10 88 5.7 irocs with t-tops and they all had no g92 rpo code and all had 2.77 gears .. i pulled up 2 hardtop 88 5.7's and sure enough both had the g92 rpo code and 3.27 gears .. with all the years ive been dealing with irocs i never even thought about this subject .. so it may be true ..

also just looked up a ton of 89 5.7 irocs and no g92 n10 exhaust and t-tops .. looks like g92's were only available in hardtop 5.7's and 5.0 5 speed hardtops .. now pontiacs on the other hand you could

Abubaca

iTrader: (3)

Not that it proves anything.....but my 88 is a G92 hardtop.

JT

iTrader: (1)

An SPID showing one would be good proof, provided it was available.

But the 1989 order guide does show N/A for G92 on the CC1 option:

IROCThe5.7L

Thanks for the info everyone! Looks like it’s true. All these years and I had no clue.

dagwood

iTrader: (5)

Awesome, I learned something too!

Drew

iTrader: (58)

The variables make it a difficult question to answer. There's almost always a gotcha in there somewhere. That might be a midyear change from GM, or maybe C&C t-tops, or Bubba with a sawzall, which some would consider to be exactly the same thing, but I digress... Perhaps the better question is - "why does it matter?" It's been several decades, T-tops are polarizing, performance isn't limited to what GM built in 1989, so what difference does it really make? The question isn't really as cut and dried as what was available anyway, it's just another thinly veiled question about resale value, or trying to justify preferring or bragging about one car over another.

JT

iTrader: (1)

I checked Compnine's records for 1989 to see if perhaps there was any indication of the export market different for this case. An example is the 1987 GTA that could get the L98 and CC1 for export only. Compnine shows 253 records for 1989 Z28/CC1/L98 with the Canadian export code. All 253 show the 2.77 gear.

chazman

iTrader: (4)

No G92 with t-tops in 1989.

ray jr

iTrader: (2)

what about 1988 , cause i looked at a ton of 88 5.7 t-top cars and all had 2.77 gears .. every 88 5.7 hardtop had the g92 option that i have found ..

chazman

iTrader: (4)

Yup, available in both '88 and '87

IROCThe5.7L

Because it's part of the history of the vehicles and people want to know. That's why.

scottmoyer

Charlie, I may need to disagree with your last comment. Yes on '87, but I can't find records of a yes for '88. None of the SPID labels and build sheets that I have for 1988, show L98 and G92 on the same sheet. Also, the order guide that I have, modified in December of 1987, states that the CC1 is not available with G92.

Do you have any documentation that mght show the early 1988 cars MIGHT have been available this way? As I said, the order guide, dated 12/87 says it wasn't available.

So, we might have just learned that the only year to get G92, TTops and the 350, was 1987.

chazman

iTrader: (4)

I was 100% on it, until you brought this up. I have seen many '88 G92, LB9 T-tops and convertibles, both 5 speed and auto. But I can't think of the last '88 G92, L98, T-top I've seen. This worthy of further investigation.

ray jr

iTrader: (2)

ive been looking for the last week and have found none with g92 and t-tops .. ill keep looking

okfoz

For the 1987 & 1988 Convertibles you could get G92 on the LB9/MM5/CC1, but in 1989 you could not, I suspect it was the same for the L98/CC1 for 87 & 88, and then in 89, they no longer offered the L98/CC1/G92/ combination.

This was Camaros only I should mention.

StevenB L98/LS1

I've seen the verts with the G92 MM5 LB9 but not with the CC1 coupes. Every CC1 coupe with 5 speed in 88 i've seen only had the M39 LB9 3.08 gear. If they did make any LB9 MM5 G92 with ttops in 88 its got to be very limited because i've never came across one in the 15 years i have been searching for these cars. I dont think i've seen any L98 CC1 cars in 88 either.

chazman

iTrader: (4)

Also, keep in mind that every LB9 G92 convertible, left the factory as a CC1 on it's way to ASC for conversion.

Also, '87 and '88 LB9 auto could have option G92 in coupe,t-top or 'vert. It included 145 speedo, 3.23 rear and KC4 oil cooler.

BizJetTech

iTrader: (3)

Good info here !!

yaj15

iTrader: (3)

Someone please correct me if I'm wrong but I thought for 1987 L98 IROC's there was no G92 option, just the 3.27 geared 9bolt.

From 1988-1989 with the L98 with 2.77 gears were standard and the 3.27 gears became the G92 option.

chazman

iTrader: (4)

You are correct. The '87 L98 got all the G92 stuff as standard.

dagwood

iTrader: (5)

My 88 IROC-Z convertible that I just sold had no CC1 on the SPID. 6th digit of the VIN is a 3 for factory convertible, G92, LB9, G80, MM5, KC4, GM3, J65, all the goodies

chazman

iTrader: (4)

I shouldn't have called it CC1, I should have just said t-top. They were built as t-tops, minus the tops and rear hatch and shipped to ASC. I think there was a picture on TGO a few years ago, where they had plugs covering the openings on the transport truck. Anyone have that pic handy?

dagwood

iTrader: (5)

That makes sense I had heard they were all t-top cars before, and just assumed they'd have CC1 on the SPID

okfoz

in 1988, G92 was an option for both the L98 and the LB9/MM5 according to the Spec sheets from GM...

How many were made??? IDK...

ray jr

iTrader: (2)

im sure quite a few have been made but we might never know how many ..

chazman

iTrader: (4)

It seems that the literature is unclear about the combo of t-tops, G92 and L98 in 1988. I could swear it was available, but I honestly can't remember the last one I've seen. We need to produce an example of a car so equipped to put this to rest.

ray jr

iTrader: (2)

im still looking and came up with nothing .. a 88 popped up near me on marketplace and its a hardtop l98 and wouldnt you know it , it has g92 3.27 gears .. almost ever hardtop seems to have it that i have found ..

yaj15

iTrader: (3)

Come to think of it I haven't seen an 88-89 iroc with the L98 and t-tops with the G92 option. Not to say they arent out there, I just haven't run across one. Most were like my 88 t-top L98 and came with 2.77's. I changed my gears to 3.45s and it really woke the car up in terms of acceleration. Wish they all came with G92 and posi as standard.

StevenB L98/LS1

I know the G92 wasn't the standard equipment anymore in 88. It had to be ordered, but we're talking about CC1 ttops for the camaro with G92 code. Every G92 LB9 MM5 and L98 ive ever seen were hardtops that i've come across. We're just trying to figure out if theres any G92 ttops camaros built with those drivetrains in 88.

Im starting to think it was only an 87 combination on the iroc. Pontiac is a different story though. Ive seen some different sides on the order option sheet between the birds and camaros but 88-89 G92 camaros i've seen so far are all hardtops.

scottmoyer

Based on this new discovery, I'm changing my asking price on a 1 year only performance package w/ TTops, 1987 IROC-Z. The 1st $100k takes it!!!

okfoz

StevenB L98/LS1

https://www.lafontaineclassiccars.co...ro-iroc-z28-2/

This one is more than likely a 2.77 gear car but the dealer says it's a posi 3.42 which i can assume was swapped at some point because G92 auto in 88 was 3.27s. Idk if the swap is true or the dealer doesn't know what there talking about. This car maybe worth investigating. It had a pic of the rpo codes but its not clear in the pic.

ray jr

iTrader: (2)

it has a gh3 rpo code which is 2.77's

dagwood

iTrader: (5)

My 1989, T-top, 5.7 car also has 2.77's

Petrov

Hi all, I got my first ever Camaro 3rd gen today.
Bought from 1st owner ,the gentleman had it since 1988 when he bought the Camaro in Arizona.
It has 5,7 tpi engine ,T tops & the G92 option....I read here its pretty rare but mine has it.(also has 4 discbrakes)
car is now in Europe ,shes a 1988 model in white ,Iroc Z and off course auto gearbox in combination with the 5.7 tpi engine..
I sold my C 5 corvette and now have this beautiful Camaro 1988 ,which btw makes a beautiful sound...
The 1st owner bought this car as a showroom model that was displayed ,so might be well equiped....

Hope this helps ,best regards all...

dagwood

iTrader: (5)

Can you please post a picture of the SPID decal inside the center console?

Petrov

Hi all ,I am a novice,any important things ,pls let me know....Its a 5.7 T-top with G92 option 1988 model ,now wondering if its special or rare...many thanks all...

dagwood

iTrader: (5)

Thank you for the SPID picture. It's weird that it's printed with the body color at the top, and the RPO's at the bottom. Never seen a SPID like that before. Anyways, I was looking to see if your car actually came with those options from the factory, as they never made any G92 cars in 1988 with t-tops. Your SPID confirms that your car has had aftermarket t-tops installed. The factory RPO code for t-tops is CC1, which your car does not have. I'm not saying that's bad by any means, but that was the only way in 1988 that you were going to get the good rear end gears with t-tops.

It is also showing a black car with silver on the bottom. Can you post a pic of the car??

Petrov

Ok ,well thats abit weird ...
The car is white ......
ill post a pic ,thought it was an all original car as the guy I bought it from bought it new in Phoenix and chevs&vettes or something like that...
Going to check the history folder and invoices...

Airwolfe

iTrader: (1)

The RPO code for factory T-tops is CC1. This RPO code is missing from your SPID label. You car most likely has Cars & Concepts aftermarket T-tops installed.

I swear when I started this reply His SPID label post was the last one. LOL

Like Dagwood said about the SPID label, Its formatting is odd. Also first I seen with the paint codes at the top with RPO codes below them.

Petrov

Here is my 88 Camaro ,I have more pics if needed.....

Airwolfe

iTrader: (1)

Those are aftermarket Cars & Concepts T-tops installed. You can tell by the piece of black trim before and after the T-top on the body of the car.

Nice looking IROC-Z.

dagwood

iTrader: (5)

Those are DEFINITELY C&C t-tops. I have them in my race car. You can see the difference right away by the bigger gap between the front of the t-tops and the windshield. They also have the trim on the roof of the car along the back edge of the glass, as well as the front edge

BEAUTIFUL CAR!!!

dagwood

iTrader: (5)

Ya beat me to it LOL

TransamGTA350

iTrader: (2)

Those are aftermarket Cars and Concepts T-Tops. Nice car.

Petrov

Thanks all ,ok so that mystery is solved .
As a novice I didnt know they did aftermarket t tops....
Was hoping for the car to be all original.
The colour is white and sticker says black.....cant understand that but must have been repainted as I dont think they mad emistakes on these code stickers.
Car is beautiful and have full stack of service history.
Its in Europe and the prices are going up for these cars ... I hope I made the right choice to buy this one ,she drives great though...
Very grateful ,for all the info...

dagwood

iTrader: (5)

I can't remember the RPO code for the yellow stripe. But if that code is on there, I'd take a gamble and say your decal format got messed up. Maybe the black with silver lower was the car that rolled down the assembly like right before your car

Also check to see that your VIN matches the one on the decal, but i would almost bet the format got off on the printer

dagwood

iTrader: (5)

Oh, and since you're new, WELCOME to TGO!