Berlinetta aluminum wheels became an extra cost option and it now came standard with its own unique wheel covers that were styled to look like the optional aluminum wheel. The Berlinetta aluminum wheel also became an option on the Sport Coupe but with argent accenting rather than gold and a “Camaro” center cap rather than “Berlinetta” one. Lower body pinstiping on the Berlinetta was revised by an additional stripe.
The new IROC-Z28 appearance and handling option was available on the Z28. It would honor the Camaro being chosen as the car of the “IROC” or International Race of Champions competition. It came with new 16×8 inch aluminum “IROC-Z” rims, P245/50VR-16 Z Rated Goodyear Gatorback tires, fog lights, new grill with CAMARO on front the license plate panel, .5 inch lowered ride height, body colored body extensions, (ground effects) Delco-Bilstein rear gas shocks, special front struts, increased spring rates, special jounce bumpers, 5 degrees of added caster in the front wheel alignment, (up from 3.5 on Z28) ‘WonderBar’ front frame rail stiffener, special valving in the steering box for increased steering effort, larger rear stabilizer bar with stiffer bushings, IROC-Z exterior decals and interior “Z28 IROC-Z” dash emblem, and a thinner two-color lower body stripe.
Tuned Port Injection (TPI) engines were introduced. The Corvette got a 350 version (L98) and the Camaro got a 305 version (LB9) available in the Z28 or IROC-Z. LB9 was available with automatic only. L69 H.O. 305 was only available in the IROC and only with 5 speed manual. L69 production was restricted half-way (April 26, 1985) through the model year.
The IROC-Z28 was capable of .88-.92g’s on the skidpad and 63.3 MPH slaloms all-stock on 245/50/16 inch rims and 80s tire tech. It would go on to be a popular sales success and recieve an “Icon of the 80s” status.
The MPFI V-6 LB8 engine was introduced to replace the carbureted LC1 V-6. It had a similar port injection as the LB9 TPI V-8. All manual transmissions were now 5 Speeds. The 7.5 inch rear end was dropped and replaced with a new 7.625 (7 5/8) inch rear end for all Camaros. The G92 (performance axle ratio) was only available on IROC-Z.
|85||Sport Coupe||M5,A4||LQ9 L4||9.0:1||2.5 (151)||88@4400||132@2800||TBI||3.73||—-||3.73||—-|
|M5,A4||LB8 V6||8.9:1||2.8 (173)||135@5100||165@3900||MFI||3.42||—-||3.42||—-|
|85||Sport Coupe||A4||LG4 V8||9.5:1||5.0 (305)||155@4200||245@2000||4bbl||—-||—-||3.08||—-|
|85||Berlinetta||A4||LG4 V8||9.5:1||5.0 (305)||155@4200||245@2000||4bbl||—-||—-||3.08||—-|
|85||Z28||M5,A4||LG4 V8||9.5:1||5.0 (305)||155@4200||245@2000||4bbl||3.23||—-||3.08||—-|
|85||Z28||A4||LB9 V8||9.5:1||5.0 (305)||215@4400||275@3200||TPI||—-||—-||3.23||—-|
|85||IROC-Z||M5,A4||LG4 V8||9.5:1||5.0 (305)||155@4200||245@2000||4bbl||3.23||—-||3.23||—-|
|85||IROC-Z||M5||L69 V8||9.5:1||5.0 (305)||190@4800||240@3200||4bbl HO||3.73||—-||—-||—-|
|85||IROC-Z||A4||LB9 V8||9.5:1||5.0 (305)||215@4400||275@3200||TPI||—-||—-||3.23||3.42|
|Year||Total Production||Z28||IROC-Z28||Berlinetta||Sport Coupe|
|Engine||GM P/N||Int.||Exh.||Int.||Exh.||Separation||Arm Ratio|
|1985 (L69 and LB9)|
|305 AT (LB9||10088155*||.350||.384||179||194||109.0||(108/-112)|
|305 5spd / 350 AT
(LM1 Police Pack.)
|305 5spd / 350 AT||10066049*||.415||.430||207||213||117.0||(116/-118)|
|305 5spd / 305 AT||10088155*||.350||.384||179||194||109.0|
|305 G92 5spd / 350 AT||10111773*||.413||.428||202||207||114.5||(116/-116)|
|85||IROC-Z28: .34 Cd|