What was the stock tire size for the 15in wheels in '87?

 

P215-65R15 Eagle GT's, both blackwall and raised white letters, depending on model and engine.

------------------
Willie

Supercharged 1987 305 IROC-Z, Daily-Driver, Emissions-Legal.
Former Paxton (6-psig) with 50-hp nitrous: 12.043 @ 112.86 mph.
ATI D1SC (10-psig): 12.056 @ 116.62 mph.
All stats are altitude corrected for 3,100 feet using NHRA's Altitude Correction Table.

http://willie.camaro-firebird.org/

1987 "20th Anniversary Commemorative Edition" Z28 Convertible -- Super Chevy Show Class Winner, 1998.

 

I've got an IROC-Z with a 305 carbed.

 

Then you've got 16-inch wheels.

Willie

 

Stock 16x8 wheels are P245/50R16

 

You would think that except my car has the 15in wheels.

Yes I know it is a bad image but it is the best I can do at the moment. But as you can see they are the 15in. I would like 16in wheels but I don't have the money to get them.

 

Technically every Iroc from 1985-1987 came with the 16" wheels from the factory. If you have 15's someone changed them.

 

It's also possible that this car is a Z28 that's been painted and striped to look like an IROC-Z. We shouldn't assume anything nowadays. Check for RPO B4Z. This is the optional IROC-Z suspension package.

Willie

 

I don't have my RPO codes someone took them out.

 

hmm wonder why

------------------
- David
88' GTA 5.7L TPI MODS---> air foil, K&N, Shift Kit, 180* therm, TB bypass, Gutted CAT, Flowmaster 80 Series

http://www.geocities.com/david_angel_16

 

Exactly. The fact that the RPO sticker has been removed raises a lot of suspicions. Because the car in question has a 305 carb (LG4), the engine code in the VIN is inconclusive.

The first thing I would do is to check whether this car is a genuine Z28 by comparing the paper VIN stickers on all body parts:

1) Hood,
2) Both fenders,
3) Both doors,
4) Hatch lid,
5) Both rear quarters,
6) Front bumper support, &
7) Rear bumper support.

#1 - 4 are easy to check out.
#5 requires removal of the inner plastic panels.
#6 - 7 require removal of the front and rear bumper covers.

The most important sticker in determining whether this car is a Z28 would be the hood because the Z28 hood is unique. If the VIN on it matches the windshield VIN, it is a Z28. If it does not, I would be very suspect.

If this car can be verified as a Z28, then the only way to differentiate it with a Z28 with the IROC-Z option would be bolt-ons. Such as the wonderbar, steering gear box, Delco-Bilstein rear shocks, & dash emblem (all of which can be replaced to make a clone). The sway bars and springs are identical, so these won't help.

Willie

 

When you say paper do you mean the stickers under the hood and on the doors etc.? Becuase those are gone too. I'll have to look into it.. But if its a Z28 thats fine I like both the Z28 and the IROC-Z but I wouldn't mind knowing which one I have.. I do know the I have the IROC swaybar in the front and the dash emblem but like you said those are easy to change. I will try and check out the rest of the stuff.

 

When you say paper do you mean the stickers under the hood and on the doors etc.? Becuase those are gone too.

Yes. The fact that they are missing makes me believe they were removed on purpose. Probably to hide something:

1) Stolen vehicle where the windshield VIN was replaced (federal offense) and because it did not match any of the other VIN stickers, all others were removed,

2) Hide the fact the car is a Sport Coupe and passed on as a Z28, &

3) Any other reason I cannot think of.

In addition to the hood and doors, additional paper VIN stickers are located in the areas I mentioned above. These are not nearly as easy to access, so they may still be there. Good luck!

Willie

 

I found one on the inside of the right side quater panel and it doesn't match the vin in the window. It is also painted over. The one on the left was taken off (still able to see where it was) I have yet to take the bumber covers off. I will tell you that it has been stolen in the past (before I got it).

 

I found one on the inside of the right side quater panel and it doesn't match the vin in the window. It is also painted over.

These paper VIN stickers are impossible to replace, so the one you found is original to that quarter panel. Unless the quarter was replaced, it is original to the car. But let's not make that deduction yet until others are located.

The one on the left was taken off (still able to see where it was).

Bummer. This doesn't help our cause.

I have yet to take the bumber covers off.

Honestly, I wouldn't expect you to do this -- it's a fair amount of work. But if you do, these VIN stickers are affixed to the steel reinforcement bars under the covers. Go for the rear bumper first as it is much simpler to remove than the front. Most people do not know about the existence of these two stickers.

I would say that if you can find duplicate VIN's on any two locations, that would be the original VIN of your car.

I will tell you that it has been stolen in the past (before I got it).

This information sheds new light. In Arizona, the state will not issue a title based on the VIN if the car has been stolen in the past. The state assigns another number and removes all VIN information. Depending on what your state's policy is, the visible VIN stickers (hood, doors, etc) could have been removed by the state!!

Keep us informed if you pursue this further. It will be interesting to see what transpires. I bet you never thought you'd get any of this information, considering you wanted to know only about tire size!!

Willie



[This message has been edited by Willie (edited October 14, 2001).]

 

Well you got me there I did not expect to get into this but since I've started I think I will continue. I will find out what happens when a car is stolen in Oklahoma and since I am not driving the car yet, I don't think it will be that bad to take off the bumber covers. Besides might as well figure out how to do it now so I'll know how when I need to later. Thanks for your help. I will keep you posted as I come up with more.

Oh. In the vin decoder would it say the car was a z28, iroc, or another model?

 

....since I am not driving the car yet, I don't think it will be that bad to take off the bumber covers.

The rear cover is not too bad. There are three 11mm nuts on each side that are accessed from inside the vehicle. Remove the taillights. Across the top of the bumper cover, there are a number of black plastic push-in retainers that must be removed. The same holds true across the bottom. That's about all there is to it. I found my paper VIN sticker on the bottom of the steel structural support member on the passenger side.

In the vin decoder would it say the car was a z28, iroc, or another model?

It won't unless it's a 1982 - 1986 Berlinetta. In 1987, the IROC-Z was not a model in itself but an option on the Z28, therefore the VIN will not show this. Also, the VIN does not differentiate between the Sport Coupe and Z28, UNLESS the engine is specific to one or the other. You mentioned previously that your car has a 305 carb (RPO LG4). Assuming it is original to your car and based on the fact that this engine was used in both the Sport Coupe and Z28, the VIN will be inconclusive.

Willie

 

Interesting

 

Well I took the back bumber cover off today and found nothing. I don't know when I'll get to the front because I am working on the engine and to get it running is the first priority.

 

I thought I might give you the results from the VIN Decoder.

VIN#1 (window): 1G1FP21HXHL112961
Made in: United States
Manufacturer: General Motors
Make: Chevrolet
Carline Code: F-Body
Carline Series: Camaro (all models)
Body Type: 2 door coupe (hatchback)
Restraint System: Manual belts
Engine Code: 305 ci V8 LG4 (1987)
X is the CHECK DIGIT
Model Year: 1987
Assembly Plant: Van Nuys
Production Sequence: 112961


VIN#2 (right quarter panel): 1G1FP21H5HL121308
Made in: United States
Manufacturer: General Motors
Make: Chevrolet
Carline Code: F-Body
Carline Series: Camaro (all models)
Body Type: 2 door coupe (hatchback)
Restraint System: Manual belts
Engine Code: 305 ci V8 LG4 (1987)
5 is the CHECK DIGIT
Model Year: 1987
Assembly Plant: Van Nuys
Production Sequence: 121308

I think it shows a bit of hope since they both show that the car had an LG4, made in '87 and was built at Van Nuys.

 

just because of the wheels, I'd guess it's a z/28 ---- but for the owner, who cares, their are only minor differences, and a Z/28 to me, is just as good as an IROC, the IROC name just gives the car a bit of "HOLY" status, so to speak.

------------------
Dan Briones
1988 Camaro Sport Coupe
2.8 V6, TCI 3200 Stall TC, B&M Transkit, Flowmaster & Catback
1983 Z/28 CFI Hood, 1989 IROC Foglamps, Custom Painted Tails, 1987 IROC Wheels
Z/28 Grille, "Heritage" Style Stripes, White Face Gauges/Gear Indicator, Homemade DRL's

 

Are we sure those didn't come stock on IROC's? I know '87 is where the 16x8" wheels ended and the 15x7" began, did all '87 IROC's come with 16's? If they switched half year then the 15" wheels might have been stock...

 

That style wheel came on the IROCs in 1988, and in pretty low numbers. Most owners opted for the 16" wheels. In 89 the 15" wheel design was changed to be a "Mini Me" version of the 16" wheels. In any case, they never came in red on the IROCs. You've either got a Z28 that somebody made some Krylon modifications to, or somebody swapped those wheels in place of the stock ones for reasons that only they are likely to understand.

------------------

The IROC Homepage
<A HREF="http://www.rit.edu/~jli4307/camaro" TARGET=_blank>
View the restoration of an 85 IROC</A>
Custom Thirdgen Subwoofer Enclosures
"I didn't know a bored out Ford could go so slow" -Shenandoah

 

If you want to see something that's out of place... these are my wheels:




Hmmm wonder if I've got a real IROC LOL

------------------
1984 Firebird - Daily driver, 305 LG4, 3.23 rear, T5 - Hurst short shifter, Edelbrock 600 CFM 1406 carb, Performer intake - Edelbrock Pro-Flow air filter, gutted cat, IROC 16x8 5 Spoke Wheels, AIWA bargain basement (from Sears of course) CD player, Eight-ball shift ****
Check out my ride here

"IT'S SNOWING! TO THE HIGH SCHOOL PARKING LOT!" - The Mustang and Firebird face off in the dead of winter.

 

Ok I was thinking. Couldn't have someone have special ordered it with red z28 wheels?

 

You CAN order anything that is offered on a car... for a price. BUT I've never heard of anybody requesting smaller than stock wheels...

 

No you can't. You get what they offer and nothing else. This isn't the 60s when you could get a COPO.

If you don't believe me, walk into your local Chevy dealer and try to order an SS with the 15" steel wheels.

Wanna see something else out of place?


It's all better now though.

------------------

The IROC Homepage
<A HREF="http://www.rit.edu/~jli4307/camaro" TARGET=_blank>
View the restoration of an 85 IROC</A>
Custom Thirdgen Subwoofer Enclosures
"I didn't know a bored out Ford could go so slow" -Shenandoah

 

So in other words what you guys are saying is either someone has changed the wheels on the IROC or someone has taken a z28 and made it look like an IROC and it would be safe for me to say I have a z28 and not an IROC?

 

I have to know, I'm goin to the chevy dealership tomorrow to see if I can get some crappy rims on a SS camaro...