maybe im just a moron

[kman87iroc]

Did I miss something or am i just stupid. I was under the understanding that Irocs were all TPI. i didnt think any were TBI. I thought the TBI cars were just Z28's not Irocs. help me out here because it seems like a lot of peopple advertise their TBI cars as an Iroc. just wondering.

[B84Cam]

i'm not totaly sure..someone back me up..but as far as i know the tbi was the base engine on the IROC. and umm the IROC is the Z28

[ColinOpseth]

tpi could be gotten either with the z28 or the iroc.

most irocs were tpi but many were tbi and even some were lg4.

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Webmaster: www.IROC-Z.org (http://www.IROC-Z.org)

[kman87iroc]

I realize that the Irocs were Z28's. What i ment was not all Z28's were Irocs.

[ColinOpseth]

the IROC was an option level added to the Z28.

the Z28 'could' have a tuned port injection engine. I almost bought one for 2000$ that needed some work, because I knew that it was rare.

The tuned port injection was 'not' a requirement for the IROC-Z. The IROC-Z was a Sport Package designed to give a streetcar that racecar feel. Powertrains were recommended, but not required.

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Webmaster: www.IROC-Z.org (http://www.IROC-Z.org)

[pimpINtheRS]

most iroc's came with tpi and most late 3rd gen z28's came with tpi as well the tbi was the base model engine wih the RS...Not saying they couldnt be in those cars but they usually didnt have em most had tpi.

[WS-666]

IROC Engine options:

85: 305 LG4 carb, 305 L69 carb, 305 TPI LB9.
86: Same as '85.
87: 350 TPI L98, 305 TPI LB9, 305 carb LG4.
88-90:: 305 TBI LO3, 305 TPI LB9, 350 TPI L98.

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...:::WS-666:::...
"Speed kills--Drive a Ford and live forever."

My F-Body Homepage (http://www.ws666.homestead.com/index.html)
AIM SN: GoneAwayFromU

http://ws666.homestead.com/files/LIKEAROCKET.jpg

['67 327]

So whats up with 91 n 92?

[jayman350]

The IROC came out in 85 as an upgrade to the Z28. It eventually took over for the z28 in 88. 1990 was the last year for the IROC, then they went back to strictly the z28.
If you are really intersted thirdgen.org has a tech data page that has a run down of all engines and specs for all 3rd gens.


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Jay

black 85 Z28, t-tops, 4bbl carb, flowmaster 80 series muffler w/ custom tips (hollowed out cat), edelbrock chrome air cleaner, Infinity 4" 2 way plate speakers, Infinity 3-way 6x9s, Alpine CDA-7863 head unit, many more mods planned (holley carb 4160 and edelbrock performer intake coming very soon)