I was scouring the eBay ads today and found a couple of items that needed some accurate input. The first one is a 1988 "rare" DX3, stripe delete car. I contacted the seller to help him with his description. Here's the ad:
http://cgi.ebay.com/ebaymotors/ws/eB...fvi%3D1&_rdc=1

This is the email I sent the seller:
Dear djfowler2009,

Not sure where you got the information for this ad, but it is very wrong. The G92 axle was available on all years of IROC-Zs and Z28s for the third generation. RPO DX3 does not make the car rare. It was an option for a sticker delete. There were 1895 made with DX3, but it doesn't make it rare. The advertised hp ratings were actually close. Your numbers are way off. Without looking at everything you wrote, you have already made too many incorrect statements. This can hurt you if someone buys it and holds you to these words.


- scottmoyer

Here was his response:
You need to do more research.

I responded:
Well, since I am the moderator of the History/Resoration forum of thirdgen.org, the largest 3rd gen technical only website, I think you need to do more research! The G92 RPO code was available in the 3rd gen starting in 1982. There were 3405 produced in 1982. In 1992, there were 3096 cars with G92. That tells me that it was available from 1982-1992! Again, RPO DX3 does not make the car rare. If only 1 car came with AM only radio in 1988, the radio is rare, but it doesn't make it desirable. Thus, not worth any extra due to being rare. The decal delete was just that, decal delete. A $60 credit on the window sticker. Not a rare option at all. Also, you state that the car is rated at 245hp. That is incorrect. The 1988 IROC-Z was rated at 230hp. The 1992 was rated at 245. I think you need to do more research!! You said 1800 cars were made with this "rare feature", I said that 1895 were made with this option in 1988. You said that this DX3 car is the second "rarest" IROC-Z to the 1988 1LE. You really want to compare a performance upgrade to stickers being deleted? Good luck with your sale and I hope you don't get sued for mis representation.

The second one I found is this one:
http://cgi.ebay.com/ebaymotors/ws/eB...fvi%3D1&_rdc=1

Based on the VIN in the advertisement, I went to our newly found friend www.compnine.com, entered the VIN and see the RPO list. I responded accordingly.

Dear rainingday427,

Just an FYI regarding your car. It is not a 1LE. When ordering the 305/5 speed with AC delete, you would have had to order G92 (performance axle) to get the high hp, better brakes 1LE. Your car has 3.08 gears, not the 3.45 that a 1LE would have. Also, the 1LEs didn't have fog lights in 1991. This car also doesn't have 4 wheel disc brakes, that a 1LE would have. This is a nice car, but it is a stripped model. It came with a basic stereo, 1st level option package, basic suspension instead of the FE2 performance suspension, manual everything and the smaller tires. The performance model would have had 245/50-16 tires. Good luck with the sale.


- scottmoyer

He replied back to me with this:
Thanks for the info. I may not know a lot about these cars, but I do know your wrong on a couple things... It does have 4-wheel disk brakes, It does not have a 3:08, It has 3:42 posi rear, we changed the gear oil last summer and checked it. It also has the high horse power engine, states that right on the certificate of origin that GM sent out with the car...states H.P. as 230 Look at the picture I posted. I know some things dont make sense on this car, thats why Im not saying for fact it is a 1LE, I really dont know and dont want to mislead anyone. But Im getting flooded with info going both ways....It is...and it isnt??? So Im only saying what I have heard. I also had a guy say its more rare than a 1LE. No matter what though, this is the cleanest rust free 91 Z28 I have ever seen!! What would you say its value would be? Seems like you know a lot about these cars. Im going to post a blown up pic of the C of O that shows the 230 HP.

 

there is a pigeon around every corner lol. awesome job on the heads up

 

I got another response from the first seller. He is absolutely clueless and not willing to listen to reason. I'm done trying to educate this guy, that has done more research than me and knows more about these "rare" cars.

I don’t think you understand packages you can order on cars. The RARITY of cars is a limited of how many were produced for the entire year of a certain model or make. It doesn’t matter if a option cost $60.00 or $1.00. It’s based on a limited number produced. Sometimes a car manufactures only allow a certain number to be produced in a production run in certain plaint.

For example: In the new 2010 Camaro you will not get a cigarette lighter now it’s called a 12V power outlet, but you can order one. In the new Mustangs you can order different tops even full glass. Many options are small and doesn’t cost much, but are hard to find later after years, thats what makes cars RARE ask any collector.

In 1988 over 96,000 Camaro’s were produced and there were a limited number of different packages. As I stated in my eBay ad , in the DX3 package there were only 1,800. Chevrolet would not allow any more to be ordered with out the stripes and decal package in 1988. In 1989 over 50,000 DX3 were made and these are not as rare. So the 1988 DX3 is very rare. On top of that the upgrade leather wrapped seats only came on certain packages of IROC-Z’s and only 800 were made in my car combination. For example in 1988 only 922 Yellow Iroc-z were produced these are also very rare if you can find one.

The other facts you stated are correct, but there were a limited number of 5.7 H.O. engines you could order in the Iroc’s and Corvette’s. These were only available to a small number of people like Police Departments, movie stars, and GM executives. The G92 is a Borg Warner high performance Axle that was also a ordered option. They were GW6(3.27) GM3(3.45). I have the 3.27. And I never stated this changed the horsepower! I don’t know were you got that from? Anyways…..

Many rare cars sometimes aren’t well know to most people, but collectors do seek these cars and thaey are usually well known to them. Most buyers just want to buy a cool car and don’t care so price is usually too high for the typical buyer. But real collectors know. I have this car listed with many auctions so Ebay isn’t the only one and what you don’t see is many people calls before placing a bid and make phone offers that is a lot higher then what you see. Oh by the way, my classic car insurance policy is $149.79 a year. It’s with Infinity Classic Collectors Auto Co.

Please don’t bother me any more. Have a good day. Sir.

I responded again, but this time I'd like to add the smiley.

Last response. Again, you are incorrect in your statements that GM limited the production of these options. The counts were what was ordered by dealers and buyers, period. Yes, you incorrectly stated 1800 DX3 cars in 1988. I got that. There were 1895. Also, DX3 is not a package, it's an individual option. GM didn't limit the number produced at all. If you want to consider it rare, then fine, but being desirable is what brings in the cash. Also, leather wrapped seats were not a part of any package. It too was an individual option available on any model of Camaro in 1988. You tell me to do more research and yet you have screwed up so much. There were not any yellow IROC-Zs produced in 1988. There were 922 yellow cars, but there were 0 IROC-Zs as it was not available on the IROC-Z after 1987.

I have no idea where you are getting the idea that there was a limited 5.7 HO. There wasn't anything listed or documented anywhere that states the 5.7 came as a HO option on the Camaro. In 1988, there was 12,116 L98 (350) IROC-Zs built. The police and GM and (LOL) movie stars got the same engine as the everyday buyer. The IROC-Z with the 350 came standard with the 2.77 gears in 1988. If you order G92, you got the BW rear with the 3.27 (auto) or 3.45 (manual). You stated the car has 245hp and I corrected that by stating the car is listed at 230. Again, you're telling me to do more research and these are the basics.

Oh, by the way, I am a collector and I do know what to look for. That's why I was trying to inform you of accurate data instead of the crap you found online. As I said before, I hope you don't get sued, but with your attitude and lack of knowledge, you are a prime candidate!!!

Scott

 

All that and you aren't wondering why that 88 doesn't have a MAF sensor?

No offense, but a person could go nuts finding problems with any f-body on Ebay if they really wanted. The fact remains that if you're not a buyer or a seller, it's really not your problem. Trying to be helpful will probably just make you sound like an @$$hole.

It does illustrate that there's as much bad information as good, and when collecting it pays to know more about the subject then the seller.

 

Drew, I know what you're saying and I usually don't notify people of incorrect postings, but something pulled at me about these two. The second one was to inform the seller that one of his commenters was incorrect telling him he has a 1LE. The seller never originally stated that until someone told him they were 95% sure it was a 1LE. I was trying to help him out. This first guy seemed like a jerk from the get go so I just felt like getting involved. It's been a slow weekend and I needed some excitement!!!

 

LOL I know what you mean. It's annoying when these things stand out so obvious to some of us, and it's entertaining if nothing else. I do wonder if someone converted from MAF to SD or if he just grabbed an engine snap shot from some other auction, etc.

The stripper Z28 looks like a nice car, unusual in the options even if it's not a 1LE. The fog lights look to be aftermarket and the switch isn't visible. I can't see the brakes, and I don't know if I'd trust a computer, but I don't see N10 dual cats, so I'd guess it's probably not a 1LE... But again I don't know if it'd really matter.

 

I like how the first guy claims the car has 320 hp. Ask him for a dyno sheet or to document the source he is getting his information from. "Movie stars?" LOL! And what's with the round fog lights?

I don't usually crack on people for their spelling, but "very" is not a difficult word to spell. He manages to misspell it...twice. It shows me he doesn't read much, so I wonder if he has ever read a single article on these cars. At least you tried to help him, Scott.

And the second car...a "1LE" with 55-series tires, 3.08 rear and drum brakes. Sure, pal.

It looks like most of the buyers are as clueless about these cars as the sellers. There is SO much misinformation out there about thirdgens, and it just keeps getting propagated by all of these "experts" who heard it from someone whose brother knows someone who used to sweep the floor at the plant...

Whoever buys the first car will probably believe it is a car built for "movie stars," and the buyer of the second car will probably go around telling people it is a 1LE until someone opens the rear lockbox, shows him the RPO codes and embarrasses him.

 

Interesting. Note the 88 that's "all original" has round fog lights. Maybe I'm wrong but that doesn't seem correct.

 

I couldn't stop laughing when I was reading the 1988 IROC ad... This guy seems to lie like a rug... Must not have to many friends in the real world...


"The IROC’S 5.7 liter V8 was reported to produce 245 HP. This is not true, it’s closer to 320 HP. The IROC’S was underrated for lower insurance premiums."

LMFAO!!!!!!!!!

 

You guys saw things that I didn't even take the time to look for. I went after what he wrote only. There is no MAF? I didn't look. The car has round fog lights? Really? I need to go back ad look again. I never really looked at the pictures!!!

Now, the black Z28 has me wondering about a few things. The original documentation from GM says 230hp. The seller also claims the car has 4 wheel discs. The only way to get 230hp in 1991 with a manual was to have G92. A G92 with a 305/5 speed with AC delete gives one a 1LE. But wouldn't a 1LE also have the 245 series tires and the 145 speedo? I guess we cannot believe the compnine website in this regard until the owner processes the RPO codes. One person stated that they are 95% certain the owner has a 1LE. I would say that based on what we know, I'm only 50% certain. The only proof is in what the owner shows from the RPO list. If he doesn't show it, we may never know. I will admit though that every VIN I ran through the compnine website has been 100% accurate.

 

I'd like to have a "VARY" rare car

 

I notice that the car was originally exported to Switzerland. I wonder if the export cars didn't have to follow the same rules as the North American-bound cars? This might explain some of the confusing inconsistencies.

I hope he can get us a confirmation one way or the other on the brakes!

 

Well, since the 1LE was setup for a North American racing and this was an export car, it might be exempt from the 1LE option. However, I'm still wonderig about the rest of the options. The RPO list from Compnine doesn't show G92, 3.42 gears, FE2 suspension or the 245 series tires. It shows 3.08 gears, rear drums, F41 and 235 series tires. That ruins the G92 performance axle requirements.

 

Preaching to the choir I know, but this is why those SPID labels are so important. I know I sweated for a few weeks on my last GTA purchase, because even though everything was correct, I needed to know that Y84 rpo.

I even had dreams about fender vents!!!!!By the way, I also love my 1984 T/A - with the fender vents.

 

On the RARE burgundy IROC with 320 HP in Georgia, here is the guys explanation of how his car had that much horsepower.


A Dyno Tec. told me there are 2 way to rate horsepower, at the fly wheel and at the rear wheel. In earlier years all horsepower was rated from the rear wheel. This was standard for most companies. The horsepower would be lower due to the loss in power through the trans., drive shaft, rear end, and axles. This report was used companies to keep insurance cost down. From rear wheel the horsepower would be around 240-245.

Now horsepower in is usually rated from the fly wheel. This is the standard way that horsepower is rated today. From the fly wheel the L98 5.7 horse power would be closer to 315-320.

The round fog lights were my touch, I wanted to break up the boxy look of the front lights a little.


Hmmmmm????

 

He's not even close to being correct. The way that horsepower ratings are calculated changed back in the early 70s. The 60s rated an engine at the flywheel on a stand with no accessories, mufflers and an optimized ignition system and fully tuned for power. The new way to measure hp was at the flywheel with accessory loss already calculated, mufflers, standard ignition and tuned for gas mileage, not performance. That's why the cars from the 60s were rated at such high hp and the the 70s were so low. I think the change was made in 72. For anybody trying to sell an 80s car, you don't reconvert back to the old system!

The factory ratings were done at the flywheel with accessory loss, but still doesn't take into account driveline loss. I don't know actual numbers, but I think the L98 would put out around 180hp at the rear wheels in stock form. Someone correct my numbers if actual numbers are known. The only 2 ways to test for hp today is by using SAE Net ratings at the flywheel (factory hp ratings) and rear wheel dyno hp ratings.

 

The seller is either a toolbag or a crook, either way he sounds pathological. There's no point in trying to argue facts with someone who lives in a fantasy world.

 

This guy is so confused (or dishonest) he should just stop. The more he tries to explain, the worse it gets.

 

Thats what I thought too. I knew his ad was BS to begin with, I just wanted to see what he said.

 

this is the part i find funny
It used the same L98 engine as the Corvette did
it is a L98 but not the same

 

No it doesn't

My 88 is a canada export car.

It has a 305 lb9 with 5 speed and g92 axle, AC delete and it's not a 1le as it has power windows, hatch and rear defogger, also came with fog lights

It does have the high redline tach, 245 tires. No alu driveshaft and no PBR 2 piston calipers, it has the iron delco moraines all round. RPO does not list 1LE. Could it be that because it was an export it did not get the 1LE stuff? Wouldn't that make it even more rare? A 1LE without the 1LE stuff? This car is 100% original, unmolested. 86K KM on it

here's my rpo list

AR9: SEAT, FRT BKT, EUROPEAN STYLE, PASS A DRIVER RECL
A01: WINDOW, TINTED, ALL SHADED, W/S
A31: WINDOW, POWER OPERATED, SIDE
A90: LOCK CONTROL, RR COMPT LID, REM CONT ELEC RELEASE
B34: COVERING, FRT FLOOR MATS CARPETED INSERT
B35: COVERING, REAR, FLOOR MATS CARPETED INSERT
B6Q: DECAL PACKAGE, 02
CD4: WIPER SYSTEM WINDSHIELD, PULSE
C41: HVAC SYSTEM, HEATER OUTSIDE AIR, WITH FAN
C49: DEFOGGER, RR WINDOW, ELECTRIC
C95: LAMP, INTR, ROOF, COURTESY AND DUAL READING
D34: MIRROR, VISOR VANITY
D35: MIRROR, OUTSIDE REAR VIEW
D7J: GEAR, SPEEDO DRIVEN
D80: SPOILER, RR END PNL
D88: DECAL, STRIPE, SPORT
E5Z: SPEEDOMETER ADAPTER (DELETE)
E7Z: SENSOR VEH SPD (DELETE)
E9Z: SPEEDOMETER KEY (DELETE)
FE2: SUSPENSION SYSTEM, RIDE HANDLING
GM3: AXLE REAR, 3.45 RATIO
G80: AXLE POSITRACTION, LIMITED SLIP
G92: AXLE REAR RATIO, PERFORMANCE
J65: BRAKE SYSTEM, PWR, FRT & RR DISC
KC4: COOLING SYSTEM, ENG OIL
K68: GENERATOR,105 AMP
LB9: ENGINE, GAS, 8 CYL, 5.0L, TPI, HO
MK6: TRANSMISSION, MAN 5 SPD, B0RG WARNER, 2.95 1ST, O/D
MM5: MERCHANDISED TRANS, MAN 5 SPD PROVISIONS
NA5: EMISSION SYSTEM, FEDERAL, TIER O
NP5: LEATHER WRAPPED, STEERING WHEEL AND SHIFT ****
N33: STEERING COLUMN, TILT TYPE
N65: WHEEL & TIRE,SPARE, SPACE SAVER, STEEL
N96: WHEEL, 16 X 8, CAST ALUMINUM
PB4: LOCK CONTROL, WHEEL
QDZ: TIRE ALL, P245/50VR16/N BL R/PE ST TL HW4
TR9: LAMP, GROUP
TT4: HEADLAMPS, HALOGEN, 4
T93: TAIL & STOP LAMP, SMOKED
T96: LAMP, FOG
UM6: RADIO, AM/FM STEREO, SEEK/SCAN, AUTO REV CASS,
UQ1: RADIO PROVISIONS, FOR STEREO
U25: LAMP, INTR, RR COMPT, COURTESY
U26: LAMP, INTR, ENG COMPT, COURTESY
U29: LAMP, INTR I/P, COURTESY
U79: SPEAKER SYSTEM, 4, DUAL FRT COAX, DUAL EXT RGE PKG
VAN: ASSEMBLY PLANT, VAN NUYS, CA
VK3: LICENSE PLATE, FRT MOUNTING PKG
V73: ANTENNA, FIXED
WW1: APPEARANCE PACKAGE(WHITE), AERO #l
W62: ORNAMENTATION, AERO PACKAGE
X06: CANADIAN GROUP
Z28: MERCHANDISED PKG, SPECIAL PERFORMANCE
Z31: ADVANCE PRICE SHEET
Z49: EXPORT, CANADIAN MODIF MANDATORY BASE EOUIP
15P: WHEEL COLOR SILVER METALLIC
40U: PRIMARY COLOR, EXTERIOR, WHITE
6DB: SPRING, COMPUTER SELECTED, FRONT, LEFT HAND
7DB: SPRING, COMPUTER SELECTED, FRONT, RIGHT HAND
8NL: SPRING, COMPUTER SELECTED, REAR, RIGHT HAND
82B: TRIM COMBINATION, CLOTH, MED DK GRAY
82I: INTERIOR TRIM, MED DK GRAY
829: SEAT BELT COLOR, MED DK GRAY
9NL: COMPUTER SELECTED REAR RIGHTHAND SPRING
90A: STRIPE COLOR, ACCENT, TWO TONE, yellow/silver

 

Unfortunately, I don't know much about the export cars and how they were equipped. Since 1988 was the first year for 1LE, I would think that the code "triggering" may not have been established yet, not sure. I would think that the Canadian export cars have a higher chance of being 1LEs because they are for the North American market and a lot of them came without AC. Again, I have no clue how GM worked with cars marked for export.

 

I have a 1988 Iroc Convertible that is U.S. made and is almost identical to Twin_Turbo's except it has air conditioning, with the Auto transmission, G92,G80,LB9, and KC4 options. Mine has the 8NN and 9NN rear springs. I've noticed all G92 equipped cars and 1LE cars seem to have these 8NN and 9NN rear springs. Twin_Turbo's has the 8NL and 9NL rear springs which my other Iroc Convertible, a 1989 without G92 has. His is unusual for a G92 equipped car to have the 8NL and 9NL rear springs which usually come on non-G92 equipped cars.

 

My 87 5.7 auto has the same springs, it's just not a G92 axle. It's an L98 w/ KC4. It's a UK export car.

AC3: ADJUSTER, FRT ST, POWER, 6 WAY, BKT, DRIVER
AG9: ADJUSTER, SEAT, POWER, 6 WAY
AR9: SEAT, FRT BKT, EUROPEAN STYLE, PASS A DRIVER RECL
AU3: LOCK CONTROL, SIDE DR, ELEC
A01: WINDOW, TINTED, ALL SHADED, W/S
A31: WINDOW, POWER OPERATED, SIDE
A90: LOCK CONTROL, RR COMPT LID, REM CONT ELEC RELEASE
B18: ORNAMENTATION, INTR, DELUX
B2L: PERFORMANCE PACKAGE & ENGINE PACKAGE V8 5.7LPFI
B3W: ADVANCE PRICE SHEET
B34: COVERING, FRT FLOOR MATS CARPETED INSERT
B35: COVERING, REAR, FLOOR MATS CARPETED INSERT
B4Z: IROC PACKAGE
B84: ORNAMENTATION, EXTR MLDG, BODY SIDE
B94: FENDER EMBLEM, Z28
B97: ORNAMENTATION, EXTR MLDG, LOWER ACCENT
CD4: WIPER SYSTEM WINDSHIELD, PULSE
C60: HVAC SYSTEM, AIR CONDITIONER FRT MAN CONTROLS
DD8: MIRROR I/S, R/V, LT SENSITIVE
DG7: MIRROR 0/S, LH & RH, REM CONT, ELEC, PAINTED
DK6: CONSOLE ROOF, INTERIOR
D08: PAINT, HIGH GLOSS FINISH
D34: MIRROR, VISOR VANITY
D42: SHADE, RR COMPT SECURITY
D6M: GEAR, SPEEDO DRIVEN
D80: SPOILER, RR END PNL
D88: DECAL, STRIPE, SPORT
E5Z: SPEEDOMETER ADAPTER (DELETE)
E72: BODY LENGTH, INCR I8 INCH
E9Z: SPEEDOMETER KEY (DELETE)
FE2: SUSPENSION SYSTEM, RIDE HANDLING
GW6: AXLE REAR, 3.27 RATIO
G80: AXLE POSITRACTION, LIMITED SLIP
J65: BRAKE SYSTEM, PWR, FRT & RR DISC
KC4: COOLING SYSTEM, ENG OIL
K34: CRUISE CONTROL, AUT0MATIC, ELECTRONIC
K68: GENERATOR,105 AMP
L98: 5.7 LITER V8 TPI ENGINE
MD8: TRANSMISSION, AUTO 4 SPD, THM 700 R4
MXO: MERCHANDISED, TRANS, AUTO PROVISIONS, O/D
NA5: EMISSION SYSTEM, FEDERAL, TIER O
NOD: ASSEMBLY PLANT, NORWOOD, OHIO
NP5: LEATHER WRAPPED, STEERING WHEEL AND SHIFT ****
N33: STEERING COLUMN, TILT TYPE
N65: WHEEL & TIRE,SPARE, SPACE SAVER, STEEL
N96: WHEEL, 16 X 8, CAST ALUMINUM
PB4: LOCK CONTROL, WHEEL
P20: HUBCAPS, WHEEL, STYLED
QDZ: TIRE ALL, P245/50VR16/N BL R/PE ST TL HW4
TR9: LAMP, GROUP
TT4: HEADLAMPS, HALOGEN, 4
T93: TAIL & STOP LAMP, SMOKED
T96: LAMP, FOG
UQ1: RADIO PROVISIONS, FOR STEREO
UX1: RADIO, AM/FM STEREO CASSETTE EQUALIZER
U21: CLUSTER, INST, OIL, COOL TEMP, VOLTS, TACH
U25: LAMP, INTR, RR COMPT, COURTESY
U26: LAMP, INTR, ENG COMPT, COURTESY
U29: LAMP, INTR I/P, COURTESY
U79: SPEAKER SYSTEM, 4, DUAL FRT COAX, DUAL EXT RGE PKG
VK3: LICENSE PLATE, FRT MOUNTING PKG
V73: ANTENNA, FIXED
YR1: SEAT,FRT CUSTOM
YS1: SEAT,RR CUST
YT1: BUILD UP DR & QTR
YT9: OPTION PACKAGE, FISHER FURNISHED PARTS
Z28: MERCHANDISED PKG, SPECIAL PERFORMANCE
1A2: SEO VEHICLE, PUBLIC SERVICE
1HV: COMPONENTS OF IROC-Z PERFORMANCE PKG(CHEV)
1SC: PACKAGE, OPTION 03
15P: WHEEL COLOR SILVER METALLIC (91)
6ZX: SPRING, COMPUTER SELECTED, FRONT, LEFT HAND
7ZX: SPRING, COMPUTER SELECTED, FRONT, RIGHT HAND
8NL: SPRING, COMPUTER SELECTED, REAR, RIGHT HAND
81Q: MOLDING COLOR, BRIGHT RED (91)
81U: PRIMARY COLOR, EXTERIOR, BRIGHT RED (91)
82C: TRIM COMBINATION, CLOTH, MED DK GRAY (C) (91)
82I: INTERIOR TRIM, MED DK GRAY (91)
829: SEAT BELT COLOR, MED DK GRAY (91)
86A: STRIPE COLOR, ACCENT, TWO TONE RED/GUNMETAL (91)
9NL: COMPUTER SELECTED REAR RIGHTHAND SPRING

 

Your 1987 equipped car has the same 8NL and 9NL rear springs as my non-G92 1989 Iroc convertible has. It also has an unusual RPO GW6 which isn't in the Camaro White book as an option for 1987 in the US. This GW6 might be the same as the G92 that is listed in the Camaro White book for 1987, but used in the UK. For some reason your 1988 UK car has the G92 RPO listed. I also noticed that both of my convertibles also have the same FE2 option, yet different rear springs since one of them is a G92 equipped car. I just looked at my 1985 Iroc without G92 and it also has the 8NL and 9NL rear springs. I've seen the RPOs on mr396 1985 Iroc with GU6 performance axle and his has the 8NN and 9NN rear springs just as my G92 1988 Iroc convertible does.

 

Twin_Turbo I just looked in the 1987 tech section. It says that all 5.7 in 1987 had to have G80, KC4, and BW 3.27 rear was mandatory so the G92 wasn't listed in the RPOs. So you do have a G92 equipped 1987 Camaro.

 

1LE specifically relates to the performance package that includes the dual piston front calipers. No dual piston calipers, no 1LE. A 1LE without the 1LE option code, isn't a 1LE.

I wouldn't put any faith into determining a cars pedigree by it's spring codes. The facts support that the spring codes mean very little. Read this post for clarification. https://www.thirdgen.org/forums/hist...ing-codes.html

If the G92 rpo code isn't on the SPID, the car doesn't have G92. The G92 RPO doesn't apply to the 87 L98 since only one axle ratio was offered with that combination. That doesn't make the car a G92 by definition because the RPO code isn't there.

 

All 1987 L98 based cars got the G92 specifics. There was no option G92 available for the 350 because, like Drew stated, there was only one axle available. Remember, 1988 was the first year that there were only the 2 models of Camaro. The basic IROC-Z pretty much replaces the standard Z28 from 1987, so you could get a basic package or a high performance package.