amoede

iTrader: (2)

Anyone have any idea how accurate the www.compnine.com website is?

I put in my VIN using the plus package where I could do vehicle rarity by RPO codes and came up with 1 of 1 with all of my RPO codes used.

The car is a 91 1LE Formula with T-tops. When I narrow it down by the engine/trans combo, exterior and interior color, t-tops and a Formula it is 1 of 3. When I add the option package 1SC it turns it into 1 of 1 again.

It would be nice to know if the website is 100% accurate or have a company to give a full blown report like a Marti report for Ford or a Galen Govier report for Mopars.

scottmoyer

If all of the VINs for that year are in the database, it should be accurate. The issue comes in when there are RPO codes that denote the day or shift the car was made and that's what narrows the count. If you use only the primary RPOs that denote color, options, engine, etc, you may find your car is 1 of possibly many. I have a 2006 Chevy Silverado crew cab in Blue Granite color with fabric interior. If I remember correctly, compnine says my truck was one of 23. I find that hard to believe. There are a couple RPOs that bring it down to that number, but they aren't pertinent to the options on the truck.

JT

iTrader: (1)

To be direct, it is not 100% accurate or complete. Compnine's database for ThirdGens is not complete with early ThirdGens being confined to just exports. Even 1991-1992 is not complete.

That said, what would matter is if they have all Formulas for 1991 in the database. Even if they're missing data, it could be Firebird, Trans Ams, GTAs, etc., and that may or may not impact the figures important to you.

How many did it show for 1991 Formulas?

gt4373

None Of Those Decode Sites Are 100% Accurate.

sofakingdom

iTrader: (1)

The info you are looking for is not contained in the VIN itself.

Therefore in order to do the lookup from VIN to RPO codes, one way or another someone somewhere somehow somewhere along the line, has to have obtained access to the factory's production database. Compnine obtained a partial download of GM's data at some point and therefore SOMETIMES has it for any given car.

Either they DO, or they DON'T, have the data FOR YOUR CAR.

Put in your VIN and see what comes back. See how much of it matches what you already know about the car. If most of it matches but a few specific options do not (*cough1LEcough*) then you can be fairly sure that they have the data, and they are right, but you are wrong. If ALL of it is wrong, then ... they probably don't have the data. If all of it matches the car, then, ... you do the math.

amoede

iTrader: (2)

I put in my VIN and then compared all the RPO codes they listed as my car being made with to the RPO codes on the car and they matched exactly. Every single one, none missing or extra on either list.

I also did a test with just choosing the RPO code 1LE in the vehicle rarity area and it listed 108 cars (this is still going off my VIN and just moving the 1LE code over to narrow it down). I tested further by adding the W66 (Formula) RPO code and it dropped it down to 46 cars. I removed the W66 code and replaced it with the Y83 (Trans Am) code, still with the 1LE code, and it listed 62 cars. So doing these tests it "seems" that they have all 108 known 1LE VINs from 1991.

I just wish I could get the info from PHS. When I ordered their packet for my 91 1LE TA back in 2004 it gave me tons more info and when I emailed Jim Mattison to confirm there were 62 91 1LE TA's he said he had all 62 VINs.

My only assumption now is that compnine does have all 108 VINs, but their RPO codes may not be 100% accurate. Then again we all know what "assume" can stand for

okfoz

Compnine -

problem is this
82-89 - only have cars shipped to Canada
1990- 100% complete
91-92 about 90-95 complete...

What I have found is there are three cases for 1991 & 1992
Case 1) The car is listed and included in the total number.
Case 2) The car is listed, but not listed with the totals number, these usually come back with no production number data. I was told that these cars were actually not in the main list, but in a supplementary list and therefore not counted in the totals.
Case 3) Not listed at all.

92GTA

iTrader: (11)

When it comes down to that % crap about how rare or common something is, I don't believe it far as I could throw the servers.

rusty vango

IMO compnine is a waste of web space.inconsistancys are a huge red flag. but im a black or white kind of thinker its either good enough.or its a POS

eseibel67

See post #7 above. It's much better than no info at all.

rusty vango

inaccurate or just no info at all .is,well "a pig in a poke"

scottmoyer

If you're looking for accuracy info to determine how rare your car is, then it's a waste since they don't have all of the info, but it's a great resource for the RPO codes for someone that doesn't have their SPID any longer. If the SPID is missing, then the rarity number probably doesn't matter as much as what the car came with.

okfoz

It is good for getting an "Idea" of what the production numbers were... I always keep in mind that the numbers I get are a minimum... So if it says there are 15 GTA's in Yellow in 1992, I keep in mind that there are at least 15 of them.



John

rusty vango

i have found that there were 50,000 86 IROC z-28s made.but that was 28 years ago. now ,counting for wrecks and rust im guessing there might be 15,000 left