Just did a vin sarch on my '86. Came back with nothing that says iroc. Vin#1G1FP87F1GN117235 HELP>>>>

 

The Vin No. won't tell you whether it is or isn't an Iroc-Z.

You need to look for RPO codes B4Z and Z28 on the SPID sticker in the console. If they are both there then it's an Iroc-z.

 

i was wonderin the same thing about mine. some things say its an iroc, and some things say its not. i know its very easy to swap parts to make it look like (or not) one.
problem is, theres no sticker in the console

 

Look around the front suspension and see if there's a wonderbar. It was IROC-Z specific. Also, check the door decal. If it shows a 16" wheel or tire size, then your car is an IROC-Z. That rul of thumb changes for 1988, but your 86 would be accurate.

 

there is a factroy wonderbar, looks like its never been off the car, so im assuming its an iroc. the cars been repainted before, doorjambs and all, so theres no door sticker.
the dash says it is, the supersized sway bars says it is, and the superquick steering ratio says it is. it also was originally a tpi car, has the iroc wheels and hood.
only problem is it has an 85mph speedo and drum brake rear end, which say its not.
to be honest im not real concerned if it is or not (not like im going to get rid of it if its not) but with the motor ive just stuffed in it, it sure makes for an iroc contender

 

my car has the iroc rpo codes(so it is an iroc). pretty much everything in the mid 80's had an 85 mph speedo (mine does). It also has drum brakes. Fear not young sir. Chances are , you have an iroc.

 

I've had my '85 since it was new. The original speedo was 85mph. Not all IROC-Z's had rear disc's. It was an option. RPO #J65, I believe (in '85, anyway).

 

only reason i was wondering about the speedo is because my last 86 had the 145mph. as far as the disc rear ends i was led to believe all irocs had rear discs.
note: i was led to believe...
its funny tho, the iroc rides better than my 85 firebird (originally equipped with that bada$$ 4cyl). the bird has had countless chassis parts replaced to improve the suspension-less go-kart like ride quality. funny, i would have thought the iroc would have worse ride quality

 

there is a factroy wonderbar, looks like its never been off the car, so im assuming its an iroc.

Never assume. Not having a history of prior owners, there is no way to confirm or deny that the Wonderbar was added by anyone in the past. I added this bar to my red '87 Z28 convertible about eight years ago. Today, it looks like it was bolted up from day one, eighteen years ago!


the cars been repainted before, doorjambs and all, so theres no door sticker.

The absence of factory decals is never good. No one knows why they were removed, whether to deceive someone or..... who knows why. Opinion: Never remove any original decals which incorporate unique information about that car, sticker that include the VIN for example.

What worries me is the lack of a SPID sticker. Why would anyone remove it? Now, it's still possible the center console was replaced..... maybe not. Who knows for sure.


the dash says it is,

This emblem is easily removed/replaced.


the supersized sway bars says it is,

A little history lesson is in order now. In 1986, the IROC-Z package was an option on the Z28. Your VIN with an eighth digit of F, says this car was originally a 305 TPI. This confirms the car is a Z28 as this engine was used only in the Z28. What the VIN doesn't tell you is whether the car came with the IROC-Z option. Knowing all this, the original question becomes, "Is this '86 Z28 equipped with the IROC-Z option?"

Having said this, there really is no such thing as an "IROC-Z" hood, for example. It is a Z28 hood. The sway bars are in the same category. Both the Z28 with and without the IROC-Z option share the same equipment, including the sway bars. The "grid" taillights are another part that comes to mind.


and the superquick steering ratio says it is. it also was originally a tpi car, has the iroc wheels and hood.

The steering gear box was also the same with one minor difference. The stops in the IROC-Z box limited the range. This was necessary to prevent the larger 16-inch tires from rubbing the fenderwells. Ironically, both boxes share the same part number. I cannot explain this.


only problem is it has an 85mph speedo and drum brake rear end, which say its not.

The 85-mph speedo was used until the last month of 1986 Camaro production. The 145-mph unit was then used on TPI equipped Z28's (with and without the IROC-Z option) for the remainder of the year. I happened to have purchased new a late model TPI Z28 (no IROC-Z) back in 1986 and it came with the 145-mph speedo.

The rear drum brakes were standard on all 1986 Camaros. The 4-wheel discs was a $179 option limited-slip ($100) was mandatory with it.


to be honest im not real concerned if it is or not (not like im going to get rid of it if its not) but with the motor ive just stuffed in it, it sure makes for an iroc contender

Yes, but it's nice to know anyways.


From the info you've provided, there is no conclusive way to determine how this car was originally equipped. I can think of maybe one other item that may lead to believing it is an IROC-Z. I'm being careful here. Fog lamps were standard with the IROC-Z package. It was a $60 option on all other 1986 Camaros. Very few Z28's (non-IROC-Z) came with optional fog lamps. Assuming yours has the fog lamps. Does the wiring harness look original? It would be difficult to add the factory wiring harness on a car not equipped with these.

 

i do appreciate everybodys help in trying to descern wether or not it is.
as i said before, i know these things are very easily swapped out.
i have plenty of experience in tearing down quite a few cars and trucks, old and new. my assumption about the wonderbar making it an iroc was based on scottmoyer's statement. the bar simply looks like its never been removed. it may have, it may have not.
as far as the stickers being removed, well as much as i hate to admit it i have worked in a couple of "butcher" paint and body shops and have seen plenty of vital info stickers removed or painted over. judging by the cheap quality paint job i think this is why there is an abscence of stickers.
console sticker? t-top car and paper labels. moisture+paper dont mix.
dash emblem, like i said, im aware of how easily these peices are removed or added.
the car was equipped with fog lights. if someone added the harness they went through a lot of trouble adding all the factory clips that attach the wire to the chassis, and the necessary connectors. along with the factory fog light switch on the dash.
if it is, great. if it isnt oh well. like you said it is nice to know.
im not trying to break down your post, just adding any info that may be helpful to the situation.
i will make an effort to find any other info that may lead to a conclusion. again, i do appreciate everyones help.

 

I'm glad to provide any information I can.

Everything thus far leads to concluding the car is an IROC-Z. We just cannot be 100 percent and never will be able to. It's too bad Chevy didn't designate these cars in some unique fashion.... but that's Chevy!

I'm kind of in the same boat. There were 744 Z28 anniversary convertibles made in 1987. It's truly sad that GM have no record of how many of these came with the IROC-Z option. So what we have today are two sub-models, a Z28 and an IROC-Z. The total production was 744 but no one knows how many of each were made. Ridiculous!

A short story comes to mind. Bear with me and you'll see my point. Back in 1996, I had my blue 1987 Z28 convertible stolen. Fortunately, professional thiefs were not involved, only some kids wanting to go for a joy ride. It was recovered three days later. About $5,000 in damage which included interior and exterior stuff. The car was taken to a local Chevy dealership for repairs. On the interior, the door panels were destroyed and the interior console (including storage lid) was cracked. On the 1987 convertibles, the SPID sticker was not stuck to the inner passenger's side of the center console, it was stuck on the underside of the lid. Because the lid was cracked and the hinge destroyed, Chevy planned on replacing it. It's a good think I was stopping by the shop every other day because when I was informed about this, I asked about how the SPID sticker would be transferred. The body shop manager attempted to show me how "easy" these stickers pull off!!! I stopped him immediately from doing this!! I told him explicitly that I did NOT want the lid replaced as there is no way to "transfer" the sticker. Being there at the right time saved my SPID from being destroyed!!!

Basically my point is you never know why these stickers mysteriously disappear.

Good luck in your quest for the truth!

Willie

 

don't worry about
"breaking down my post". The more I read the more I learn.