What does IROC stand for, and what's the difference between an IROC and a Z-28?

 

International Race of Champions. IROC-Z is the nameplate that Chevy used for the Z-28's while the Camaro was the car used for the IROC race series.

-Mark W.
'88 SC Camaro w/ 305 TBI

[This message has been edited by Mark305TBI (edited February 02, 2001).]

 

International Race Of Champions, it was a racing circuit basically made for TV and the thirdgen camaro was the car raced in it from 1985 to 1990 till chevrolet lost the contract to the dodge avenger.

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She is not the fastest thing in a straight line but she sure will stick in the turns.
Hawian Orchid X-SCCA showroom stock 2 time national/ 1 time regional (not with me driving) champ 1LE 92 Z-28

-suspension parts include koni reds, eibach racing springs, weight-jacks, relocated control arms, and the list goes on for suspension; Port & polished TPI system sitting on top a fully blueprinted, balanced and matched race built 305; centerforce II clutch; custom 3.4 auburn rear, custom dual cat exhuast with hooker aerochamber muffler; 1LE fuel pump and gas tank; SS track baer braking system; griffin aluminum radiator; 6 point bolted roll cage with 5 point harnesses; pioneer speaker system; sparco seats, just about as light as you can get a weekly driven 3rdgen.

 

The dodge avenger wasn't even produced at the time. LOL It's the Dodge DAYTONA. lol

 

ya ya laugh it up, i knew that did not sound right. The important point was that it went from a pretty sweet GM body to a chrysler of all things.

 

I beleive they used the camaro long before 85... I think it replaced the porsche in the seventies...

zroc

 

When they produced both a IROC and a Z28 car, the IROC got the better 16" wheels, thicker roll bars, a extra "wonder" bar, and I think better springs both front and back too. I still hear rumors of 15" IROC wheels, although every IROC I've ever seen had your regular 16 inchers. The IROC is basically just an option package on the Z28, but they basically made the IROCs take the place of the Z28 from 88 to 90 I guess there was no "base" Z28 to be different those years. Someone correct if I'm wrong on anything.

Whatever the little details, you can definitely tell the difference between the two handling wise. My IROC is noticeably better but it does ride a little rougher (like I care). God knows the 16" IROC rims kick the crap out of the butt ugly 15" Z wheels. I ditched those suckers ASAP...

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Ray87Z
-Vortec headed 350.
86 IROC w/ a cammed 305 TPI.
Formerly Ray86IROC.
www.inter-scape.com/Ray


[This message has been edited by Ray87Z (edited February 06, 2001).]

 

This is best IROC specific web site out there -

http://iroc.fbody.com/

 

Hey Ray - I have the dreaded 15 inchers...I can post pics if you want. They are the older indented style although I wish they were the newer type or even ROH. I also have the **** poor 115mph speedo. I do have the wonder bar though but I'm unsure about my springs. :/

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Base: 89 Iroc-Z LB9 auto 2.73 posi
Exh: 3" Dynomax muffler, 3" Pipe in place of cat
Ign: GMPP 8MM wires, Accel cap&rotor, AC Plugs
Fuel: Cleaned and flow-matched injectors, afpr, !air pump&diverter valve
Sound: Clarion deck, Kicker speakers and amps
Suspension: KYB Shocks, BMR Strut Tower Brace
Misc: TB Bypass, Synthetic Oil, Flexlite Transmission cooler,
free mods, flow tech headers on the way,
engine swap and 4th gen seats in the works...