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The Camaro IROC-Z was on Car and Driver magazine's Ten Best list for 1985. The 305 c.i. 5.0-liter TPI LB9 was rated at 215 hp (160 kW), with the 4-bbl 305 LG4 at 155 hp, and the 4-bbl High Output 305 L69 at 190 hp (142 kW). A total of 2,497 L69 IROC-Z models were made for 1985.
The cars were nearly 500 pounds (227 kg) lighter than the second-generation model. The IROC-Z was introduced in 1985 and continued through 1990. National Highway Traffic Safety Administration (NHTSA) Regulations required a CHMSL (Center High Mounted Stop Lamp) starting with the 1986 model year. For 1986, the new brake light was located on the ...
In 1985, this engine was optional only in the Camaro Z28, IROC-Z and Trans Am equipped with the WS6 performance suspension. The LB9 was also available in the '87-92 GTA and Firebird Formula. 215 hp (160 kW) and 275 lb⋅ft (373 N⋅m) and varied between 190–230 hp (142–172 kW) (with 275–300 lb⋅ft (373–407 N⋅m) of torque) over the ...
Also new was the addition of an IROC model with either the 3.0 L V6 or turbocharged 2.5 L engine. Visually, IROC models differed from lesser models, having a ground effects kit and alloy wheels, among other differences. The IROC decals where added in halfway through 1991 even though all Shelby Daytonas from 1991 were considered to be IROCs.
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English: A 1986 Chevrolet Camaro IROC-Z in Black (41) with Gold decals and Saddle interior. 5.0-liter fuel injected V8 (LB9, 190hp) and automatic transmission, built in Van Nuys, CA. Date 29 May 2021
The LT-1, a Corvette engine built from the ground up using premium parts and components, was a much better performer overall than the smaller Trans-Am racing-derived 302 cu in (5 L) V8s used in 1967-69 Z/28s; greater torque and a less-radical cam, coupled with the 780 cfm Holley four-barrel, [1] permitted the less high-strung new Z/28 to be ...
IROC XIII was the thirteenth year of IROC competition, ... 1985 Indianapolis 500 winner: 9: Hurley Haywood: 31: $46,000: SCCA Trans-Am Series 1988 Trans-Am Champion: 10: