Difference between IROC-Z, RS ,& Z-28 camaros?
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From: The Bay
Car: 1990 pontiac Firebird
Engine: v6
Difference between IROC-Z, RS ,& Z-28 camaros?
Ive broken it down to these 3 cars in my area, a IROC-Z, Z-28, and RS Camaros.....The years are 1989, and 1990 and 1991....but basically what i really need to know is the difference and which one is better basically there differences from each other...It would help a lot thanks!
Joined: Jul 2000
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From: In a mint Third Gen!
Car: Red 87 IROC-Z28 T-Top
Engine: 5.7 Tuned Port Injection
Transmission: 700R4 Auto
Axle/Gears: BW 9-Bolt 3.27
Joined: Jul 1999
Posts: 10,950
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From: Orange, SoCal
Car: 1990 Pontiac Trans Am
Engine: 355 TPI siamesed runners
Transmission: Tremec T56
Axle/Gears: 12-Bolt 3.73
Re: Difference between IROC-Z, RS ,& Z-28 camaros?
Here, I did a search for you and found this:
https://www.thirdgen.org/forums/hist...ween-rs-z.html
Which one is the best would depend on which engine and trans is in them and how many miles are on them. In my mind I wouldnt even touch the RS. The IROC and the Z28 are very close in performance. The IROC will have slightly better suspension but the engine packages will be the same.
https://www.thirdgen.org/forums/hist...ween-rs-z.html
Which one is the best would depend on which engine and trans is in them and how many miles are on them. In my mind I wouldnt even touch the RS. The IROC and the Z28 are very close in performance. The IROC will have slightly better suspension but the engine packages will be the same.
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From: Doghouse ······································ Car: 1989 Formula 350 Vert Engine: 350 L98 Transmission: 700R4 Axle/Gears: B&W 3.27
Car: 87 Formula T-Top, 87 Formula HT
Engine: 5.1L TPI, 5.0L TPI
Transmission: 700R4, M5
Axle/Gears: Sag 3.73, B&W 3.45
Re: Difference between IROC-Z, RS ,& Z-28 camaros?
Honestly they used the same engine, cam specs, heads, exhaust manifolds were all the same. The difference is with the EPROM Program. The 1992 was the most economical, but otherwise there is little or no difference insofar as the engine.
The 1990 was the lowest production as they only made them thru 12-31-98.
The 1990 was the lowest production as they only made them thru 12-31-98.
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From: Killam, AB
Car: 1989 IrocZ Convertible
Engine: 305 TPI
Transmission: T5 - 5 Speed Standard
Axle/Gears: 3.08
Re: Difference between IROC-Z, RS ,& Z-28 camaros?
As Kevin91Z mentioned, check out the tech data. It's not just about years. Here is an example of the data. This parts describes why the Iroc-Z was the top model to be had . . .
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.
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