“Make the earth move.”
In 1985, Chevrolet kicked the third-generation Camaro up a notch (or more) with the release of the IROC-Z, inspired by the International Race Of Champions race series. The IROC-Z was an option package (B4Z) for the Z28 and cost $695.
Suspension upgrades specific to the IROC-Z were Delco/Bilstein shock absorbers for the rear wheels and 16-inch wheels all around with Goodyear Eagle GT P245/50VR16 tires—large for the day and a size still readily available.
The IROC-Z also included louvered hood inserts and more aggressive ground effects and spoilers than the Z28. Finally, it was lowered half an inch compared to the Z28.
Three engines were available in 1985 for the IROC-Z, all sized at 5.0 liter/305 ci: standard was the LG4 carburetted motor at 155 bhp. The optional engines available depended on transmission—if you chose the five-speed manual, you could get the High Output carburetted L69 with 190 bhp (not available on the garden variety Z28) while if you went with the four-speed automatic, you could choose the Tuned Port Injection LB9 at 215 bhp.
If you cared (and I think most of the target market did not), mileage wasn’t great: the EPA ratings of the day were 16 city/22 highway for the LG4, 15/24 for the L69, and 16/22 for the LB9.
According to Hagerty’s valuation tools, all the money for a 1985 IROC-Z in #1 condition is $19,400. IROC-Zs make regular appearances in the Hemming’s Motor News classifieds. As I write this in November 2013, there’s a red 1986 with 89,000 miles for sale for $8,000. Please make mine Blaze Red, with the optional and expensive when new ($821) t-tops. I know they often leak, but I like the look.
Interestingly, Hemmings also has a white 1985 IROC-Z for sale. It has 765 miles, and the seller wants $50,000 for it. At first, this seems ridiculous, but then this particular IROC has special provenance: it is one of the two Live Aid cars from July 1985, with almost 100 signatures of folks such as Mick Jagger, Bette Midler, and Jimmy Page preserved in clear coat.