What is IROC?

Simply put, what is IROC? What does it add/take away?

IROC was an option for Camaro Z28's back from about 1987 - 1990. Back in those days there were like four different engine options on a Z28. Base was a 195-200 HP 305 V8, there was also a HO 220-225 HP 305 V8. Then there was the option for a 245 HP 350 V8 - which you could only get in an automatic. There were both 350 & 305 IROC's made back in those years.

Alright I got it.. Just another tag but still power...

What is 'LT1' motor or what does it mean?

LT1 is the V8 engine in 93-97 F-bodys, and 92-96 Corvette. It is an RPO code and also a name, like 1LE. It is a second generation small block.

LB9 is the RPO code for the Tuned Port Injection 305, L98/B2L is the RPO code for the 350 Tuned Port Injected engine.

the IROC package was an upgrade over the Z28, it had beefier sway bars, better springs, lowered ride height, larger wheels, better engine options, solid colors instead of two tone. and probably a few other ods and ends

i believe that the iroc was more than just a tag. it had a suspension upgrade too

ok ok ok....first off....the IROC is not just a mere Z-28...the IROC is a Z-28 with the "IROC" package which includes a different body kit, nosecone, taillights, and a stiff racing suspension. The option is available for Z-28s from 1982-1991...which has all the same bodystyles. The LT-1 engine wasn't only offered in the 93-97 F-bodies because my '82 has an LT-1 engine in it...it is the standard 305 V8 engine in 82-91 camaros. at least 1BAD305 was smart and knew what he was talking about! lol.....but n e wayz...have a good day cause i'm going to lunch....."yummmy....school lunch!"

-skaarjassassin

I think everyone knows that there are several versions of LT1's as well as many other engines. When someone refers to an LT1 this day in age, they're referring to the engines in the C4 Corvettes, and the 93-97 4th Gen F-bodies. I've never once heard anyone refer to a 305 as an LT1. From the 3rd Gens it's always 305 and 350 since there were two V8's to choose from...

someone told me IROC stood for International Race of Champions. anyone know if that's true?

that's correct

isn't there a porsche model IROC? and why did chevy decide to make an IROC version? were there no SS?

The International Race Of Champions competitions involve cars that are ALL identical, so it's all about the drivers skill. But I'm pretty sure the version they race is not a version we could buy.

there's more than one iroc race because it is international so it would make sense that there are other makes of cars that are iroc....

:iagree:
but I don't follow it

There was no LT1 in the 80's. The original LT1 was in the early 70's. It had around 300hp. In 92 chevy named their new engine the LT1 because it was the first engine of theirs to break 300hp since that time. Emissions put a damper on the performance market for a long time.

The IROC's also had different 16 inch rims.

IROC stands for International Race Of Champions.
If you follow NASCAR and such, they host the IROC race that consists the ability of the drivers where each car is the same in all respects and it’s all about who can drive.
During the Chevy years, this was award to GM and the special package was placed in the Camaro line. If I remember correctly, GM lost this to Dodge back in 92 or so. Dodge had placed this package on there Daytona’s. I’m not sure what happened after that for I had lost interest.

ok ok ok....first off....the IROC is not just a mere Z-28...the IROC is a Z-28 with the "IROC" package which includes a different body kit, nosecone
WRONG... Same body, different emblems and stickers...

and a stiff racing suspension.
Hmmm, Racing suspension? How about "stiffer suspension"...

The option is available for Z-28s from 1982-1991
WRONG... 1985 through 1990 when Dodge took over IROC...

The LT-1 engine wasn't only offered in the 93-97 F-bodies because my '82 has an LT-1 engine in it...it is the standard 305 V8 engine in 82-91 camaros.
WAY WRONG... LT1's (without the hyphen) debuted in the 1993 Z28. The LT-1 (with hyphen) was available from 1970 thru 1973 when it was replaced by the LM1 for 1974. LT1 engines (with or without hyphens) were always 350's... I guess your '82 has the 1LE brake system too!!

at least 1BAD305 was smart and knew what he was talking about! lol.....but n e wayz...have a good day cause i'm going to lunch....."yummmy....school lunch!"
-skaarjassassin
Glad he does 'cause you sure don't!! Go back to school, you need learnin'!!

after dodge the trans am won iroc...however they did not make a production car with an iroc package

the LT-1 in the 1970 camaro, was 360 hp, and in the vette was 370 hp, the most powerful carburated small block chevy ever made. and im pretty sure that 93 was the first year of the LT1, the new style small block with reverse flow cooling and the optispark distributor. i have NEVER heard of a 92 camaro with the LT1. i would like to see build sheets, and paperwork to back it up. anyone can swap it in and show pictures, but if you have the paperwork to back itup, ill eat my words. as far as what an IROC is, it is a package option to put on the Z28, so it was basicly a Z with different body options. as far as the suspension , i dont know if the IROC had a diff one than the Z.

they did, the WS6 ram air is basicly what they use for the iroc, but, now i dont know what they will use for iroc, since the axed the f-body

You could get an iroc from the years 85-90. It is actually rare to see a 90' iroc because, Chevy started making irocs in 1989 for the 90' model year, but they cut production half way through. So there are only half as many 90' irocs as there should have been.

Ok, the IROC race started in the 60's I think. Back then it was actualy an international race. But now adays the Iroc race is NASCARS "driver against driver" race. From 85-90 Nascars IROC race, which uses identacle cars, was raced with the Camaro. Thus chevy offerd the Iroc-Z for those years. Now if that dudes 82 had an LT1 in it, it was most certainly transplanted. There was an LT1 in the early 70s but it is nothing like the LT1 of the 90s.

Ok, the IROC race started in the 60's I think. Back then it was actualy an international race..
The IROC race debuted on October 27, 1973 at Riverside with 15 Porsche 911 RSR's prepped by Penske and a truly international field of drivers. After some expensive race crashed the series switched to Camaro's in 1974 and remained with them until the last race in 1980. The series was reborn in 1984 and Chevy decided to market the Camaro-only series with a special model, the IROC-Z for 1985.

But now adays the Iroc race is NASCARS "driver against driver" race. From 85-90 Nascars IROC race, which uses identacle cars, was raced with the Camaro. .
Yeah, it seems to definitely favor the NASCAR crowd and one would think it IS a Nascar series, but it's not... At least they say it isn't so far!! lol

The best deinition I've heard for IROC is....
Italian Redneck Out Cruzin'! :naughty:

the LT1 actually debuted in the 92 Corvette.. either way, the IROC package on the 85-90 Camaros was more than just stickers, i think we all can agree to that.. and as for the Lt-1's from the 70s.. we all can agree that they dont make engines like that anymore.. :\ but is that necessarily a bad thing? And for the record.. the LS1 kicks the LT1's ass.. lol that's why im looking for a 98-02 Camaro

lol, well for thoes who dont know what a iroc looks like, its the white car on my sig.. its one of the "rare" iroc's, its a stripe deleate and its got the 305TPI auto(225hp) with 4 wheel disk brakes. and it doesnt have the retarded camaro print interior. its got a gray fading to black center insert(orginal)
its for sale
1500, all it needs is a tranny

The iroc had a different GFX package along with a front grill and grid style rear taillights. It has quicker steering and some chassis reinforcement.

Checkout this site for tech data on thirdgen fbodys.

http://www.thirdgen.org/newdesign/tech/techdb.shtml

The iroc had a different GFX package along with a front grill and grid style rear taillights. It has quicker steering and some chassis reinforcement.

Checkout this site for tech data on thirdgen fbodys.

http://www.thirdgen.org/newdesign/tech/techdb.shtml
I've seen this tech sheet everywhere and it doesn't list the 89 RS as available with a 305TBI/manual trans/Borg-Warner rear combo, yet that is exactly what I have and I ordered it that way. I even got the G92 package with a 3.27 factory gear which is supposed to only be available with an automatic. I have the posi tags from the first rebuild in 1992 and it has the factory codes and 3.27 right on it. Damn weird car I have!!

murco, the only thing i can think of is that you got a G92 axle, not the package. otherwise it would be the 305TPI with the five speed and posi rear.

lol, well for thoes who dont know what a iroc looks like, its the white car on my sig.. its one of the "rare" iroc's, its a stripe deleate and its got the 305TPI auto(225hp) with 4 wheel disk brakes. and it doesnt have the retarded camaro print interior. its got a gray fading to black center insert(orginal)
its for sale
1500, all it needs is a tranny

boots man, i'd sell my my mother's kidney's to have ur car. i even had a 700R4 sittin around till 2 days ago. :banghead:

yea id like to have it to, i have 2 trannys sitting around... if you lived close to md id get a fuckin loan and take it off your hands...

You all forgot to mention that the IROC (third gens) all have four wheel disc brakes: the 1LE performance package. 2 piston calipers in the front. If you need to buy new brake pads expect to spend $70 for the cheapest ones, they don't mount like most pads do.

not ALL IROCs have 4 wheel disc brakes, only the ones that were optioned that way.

Fuel for thought( no pun intended) The 4 wheel disk brake, majority of them came with a 3.23 open rear end, odds is if you have posi/LSD(Limited Slip Differental, for the meat balls out there) then you have drum back brakes, and btw, im still looking for a 700R4,Ridge runner, you still have yours, and if you do, how much you want for it?

well the real reason its called an "IROC" was for chevy to commemorate the use of the camaro in the International Race Of Champions which i believe for the third gen debut was in 84 or 85, those cars were just like the camaro irocs u would have just they stripped the interior for wieght and added rollbar and all those race required safety shyt

4 wheel disc brakes didnt come normally with an open rear end. Every 5.7L car came with 4 wheel disc brakes, and every G92 car came with 4 wheel discs, and both had posi. The only way you would get an open diff with disc brakes is if you bought a crappy LG4 305 or a TBI 305 and paid extra for 4 wheel discs.

well the real reason its called an "IROC" was for chevy to commemorate the use of the camaro in the International Race Of Champions which i believe for the third gen debut was in 84 or 85, those cars were just like the camaro irocs u would have just they stripped the interior for wieght and added rollbar and all those race required safety shyt
Under the exagerrated bodywork the actual IROC racers there was nothing "factory" about them. They were full tube-frame cars much like NASCAR chassis'. I think Banjo Matthews built the chassis and the bodys were fiberglass replicas... There was little in common between the street and race cars.
The only way you would get an open diff with disc brakes is if you bought a crappy LG4 305 or a TBI 305 and paid extra for 4 wheel discs.
I bought the crappy TBI 305/5-sp in an RS and still got the posi B-W rear with discs. My rear discs were bigger than the front!! LOL

I agree with Murco. There was no real difference in an IROC and a Z28. I grew up during those years. As best as I can remember, the 16" rims came out on the Z the year before Iroc came out. I think IROC's were made from about 87-89. I could be wrong on that, but I worked at a Chevy dealership during that time. The IROC's were rebadged (sp?) Z28's to promote chevys being in the racing series. The paints and stripes did change during those years, but there were no differences in the motor or suspension, etc. Just my 2 cnts.
KevinD

acually the bodys on the Iroc race cars were sheet metal, and they were a nascar underpinnings, just like in todays iroc Series

Your car was probably just ordered with 4 wheel discs and posi traction. Not uncommon because alot of people ordered posi.

Irocs were made from 85-90 and in 88 they dropped the Z28 model until its return in 91.

so, does this make my iroc a bitch car???
And im still looking for a 700r4, or now a 350t/400t tranny

Fuel for thought( no pun intended) The 4 wheel disk brake, majority of them came with a 3.23 open rear end, odds is if you have posi/LSD(Limited Slip Differental, for the meat balls out there) then you have drum back brakes, and btw, im still looking for a 700R4,Ridge runner, you still have yours, and if you do, how much you want for it?

hey, yea im bout to put it in my car tomorrow, just got a 2200 stall for it, and corvette servo is on the way, but i will swap it out when i get my t5 or t56, and im looking for one right now, so as soon as i come up with one, you will be the first to kno

acually the bodys on the Iroc race cars were sheet metal, and they were a nascar underpinnings, just like in todays iroc Series
I could be wrong, but I'm pretty sure they were fiberglass for ease of repairing body damage. Look at the photo 4th from the bottom with the open hood. The underhood bracing and the inner fender edges look pretty thick for sheet metal...Irocracing.com (http://www.irocracing.com/History/1984/1984_photo_album.htm)

The hood may have been fiberglass and the nose is but I doubt the rest is fiberglass.

thats exactly what i was gona say dober, ohh murco, beautifull car.

4 wheel disc brakes didnt come normally with an open rear end. Every 5.7L car came with 4 wheel disc brakes, and every G92 car came with 4 wheel discs, and both had posi. The only way you would get an open diff with disc brakes is if you bought a crappy LG4 305 or a TBI 305 and paid extra for 4 wheel discs.



Not all G92's came with disc brakes. In 1991, "for a brief period" as stated in the camaro white book for 1991, rear disc was not available and a $287 credit was given. I'm still trying to find out how many G92 rear drum cars were made. My build date is 02/91.

The hood may have been fiberglass and the nose is but I doubt the rest is fiberglass.
The entire body was fiberglass and produced by Diversified Glass Products (DGP), who still make them for IROC today...