Z-28 IROC-Z
#1
11-14-2006, 09:54 PM
Z-28 IROC-Z
What is the difference between a Z-28 and a IROC-Z? I also need to find someone with a dark metallic blue IROC so I can get the paint code of this color. My reason is my sister had one and she has passed away and I am in the process of saving a 1984 Z-28, T-Topped camaro and I want to build this one like my sisters was, I tried to buy hers but it got sold to someone else and know is my chance to build one for her. I am in the process of trying to save this camaro from the crusher. I am sure I will have more guestions along the way of rebuilding this Z-28. Thanks for any help.
#2
11-14-2006, 11:02 PM
RE: Z-28 IROC-Z
New noses for all '85 Camaro models and new, deeper valances and front spoiler for the 1985 Chevrolet Camaro Z28 and the newly introduced 1985 Chevy Camaro IROC-Z28. The NACA style hood ducts were replaced by simulated hood louvers on the Z28. Z28 got new `grid' pattern taillights. The number of lower body stripes grew from 2 to 4 on Z28 with a body colored gap between the top 3 stripes. Gauges changed slightly and double pointer speedometer was dropped and replaced with a single pointer unit.Berlinetta aluminum wheels became an extra cost option and Berlinetta 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'. Lower body pinstiping on the Berlinetta was revised by an additional stripe.The new IROC-Z option was available on the Z28 and came with new 16x8 aluminum rims, P245/50VR-16 Z Rated Goodyear Gatorback tires, fog lights, CAMARO on front license plate panel, .5 inch lowered ride height, body colored valances, Delco-Bilstein rear gas shocks, special front struts, increased spring rates, special jounce bumpers, 5 degrees of caster (up from 3.5 on Z28) in front wheel alignment, `WonderBar' front frame rail stiffener, special valving in steering for increased steering effort, larger rear stabilizer bar with stiffer bushings, IROC-Z exterior decals and interior dash badge, and a thinner two-color lower body stripe.`Tuned Port Injection' (TPI) motors 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 IROC and only with 5 speed manual. L69 production was restricted half-way (April 26, 1985) through the model year.MPFI V-6 LB8 motor introduced to replace carbureted LC1 V-6. It Had similar port injection as LB9 TPI V-8.All manual transmissions now 5 Speeds.7.5 inch rear end dropped and replaced with a new 7.625 (7 5/8) inch rear end for all Camaros.G92 (performance axle ratio) only available on IROC-Z for 1985.
The IROC-Z28 is capable of .92g's on the skidpad and 63.3 MPH slaloms.
The last year for the Iroc Z was 1990.
All 305 TPI (LB9) motors (1985-1992) came with one of two basic cam grinds. An easy way to identify the type of cam on an LB9 car is to look at the tach: the lesser cams have a yellow line at 4500 and red line at 5000; the hotter cams have a yellow line at 5000 and red line at 5500. See chart at end of chronology for more cam info.LG4 305 V-8 cars got electric cooling fan.G92 performance axle ratio available only on Z28 and IROC-Z.Records show that 74 L69 (5.0 liter H.O.) Camaros were built. The L69 is shown as being available in the 1986 Camaro brochure, but it was put on strict restriction.It's rumored that records also show that 50 1986 350 (5.7) IROC's were built. These cars were built primarily for testing and were the ones we saw tested by the automotive press late in 1986. These 350 IROC's (being 1986's) had the externally mounted third brake light on the hatch glass and the pre-1987 head/edge mounted valve cover design. The 350 in the IROC-Z differed from the Corvette 350 TPI in that the IROC-Z 350 TPI had the regular Camaro valve covers, iron heads, (instead of aluminum) and the iron IROC-Z exhaust manifolds. At the last minute it was decided that the 1986 350 IROC would not be available. Fortunately they decided to start production of the 350 IROC in 1987.
Paint RPO's change for a new base-coat, clear-coat process.
As far as color codes go what year was your sister's car?
I can find out the Rpo numbers.
[IMG]local://upfiles/2816/3E7C094F811848338A16540EA1FCF5E3.jpg[/IMG]
The IROC-Z28 is capable of .92g's on the skidpad and 63.3 MPH slaloms.
The last year for the Iroc Z was 1990.
All 305 TPI (LB9) motors (1985-1992) came with one of two basic cam grinds. An easy way to identify the type of cam on an LB9 car is to look at the tach: the lesser cams have a yellow line at 4500 and red line at 5000; the hotter cams have a yellow line at 5000 and red line at 5500. See chart at end of chronology for more cam info.LG4 305 V-8 cars got electric cooling fan.G92 performance axle ratio available only on Z28 and IROC-Z.Records show that 74 L69 (5.0 liter H.O.) Camaros were built. The L69 is shown as being available in the 1986 Camaro brochure, but it was put on strict restriction.It's rumored that records also show that 50 1986 350 (5.7) IROC's were built. These cars were built primarily for testing and were the ones we saw tested by the automotive press late in 1986. These 350 IROC's (being 1986's) had the externally mounted third brake light on the hatch glass and the pre-1987 head/edge mounted valve cover design. The 350 in the IROC-Z differed from the Corvette 350 TPI in that the IROC-Z 350 TPI had the regular Camaro valve covers, iron heads, (instead of aluminum) and the iron IROC-Z exhaust manifolds. At the last minute it was decided that the 1986 350 IROC would not be available. Fortunately they decided to start production of the 350 IROC in 1987.
Paint RPO's change for a new base-coat, clear-coat process.
As far as color codes go what year was your sister's car?
I can find out the Rpo numbers.
[IMG]local://upfiles/2816/3E7C094F811848338A16540EA1FCF5E3.jpg[/IMG]
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