Well, I've finally come to the conclusion that my car needs too much work to meet my goals. I need a better starting point, and a solid 88-92 IROC or Z-28 is what I want to start over with. What are the differences in these years? I want to know appearance, performance, electronics, interior, anything you can think of and advantages of each year. Also, what is the difference between speed density and mass air and advantages of each. What years are they on? I'm researching al I can, but I'd like a list in one place using everyone's input. Thanks.
Matt

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82 Camaro:
350
Erson cam, ported heads,Comp Cams 1.6:1 rocker arms
Edelbrock Performer RPM intake, Holley 600
Crane Hi-6 ignition, Accel supercoil
TH350 tranny with 2500 stall.
Eibach Pro Kit
SLP 1 3/4" headers

 

there were no IROCs made after december of 89(90 model year).

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ICON Motorsports
1st & 3rd
MM Black Diamond 538 F&AM

 

In my opinion, a 90 IROC 350 TPI is the best car. It's got the speed-density setup, which was good for an additional 5hp over the MAF engines. It handles phenominally, too. If you can get one fully-loaded, that's nice too. heh

 

What's better for modifying: speed density or mass air?

 

gm went to speed density about the same time ford went to mass air flow. from what little bit i understand about it mass air flow is more accurate but is a bigger hinderance in modding the engine, so look for a speed density car.

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ICON Motorsports
1st & 3rd
MM Black Diamond 538 F&AM

 

yeah, something about the MAF's not being able to adapt to new equipment (i.e., cams and such) as easily.

 

Actually, the opposite is true. MAF systems physically "sense" the amount of airflow whereas SD "reacts" to airflow changes. This is what makes MAF easier to tune for changes.

I'm not going to state which system is "better", only that GM went to SD as a cost savings measure. Then GM went back to MAF in 1994....hmmmm.......

You might want to take a look at what my 305 MAF system can do.... results in sig.



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Willie

Supercharged 1987 305 IROC-Z, Daily-Driver, Emissions-Legal.
Former Paxton (6-psig) with 50-hp nitrous: 12.043 @ 112.86 mph.
ATI D1SC (10-psig): 12.056 @ 116.62 mph.
All stats are altitude corrected for 3,100 feet using NHRA's Altitude Correction Table.

http://willie.camaro-firebird.org/

1987 "20th Anniversary Commemorative Edition" Z28 Convertible -- Super Chevy Show Class Winner, 1998.

 

1990 350 TPI cars have 5 more HP than 1989 350 TPI cars because of a piston change which increased the compression. The 305 5-speed TPI cars in 89 and 90 are rated at the same 230 HP.

On the MAF vs SD debate, I think MAF is better for stock applications, but tuning a speed density for mods is much easier. If you're retrofitting a car, speed density is the way to go. If you have 86-89 MAF now, keep it. If you have 85 MAF, convert to speed density. This is all my opinion.


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1991 Camaro Z28
5.7L 5-Speed (originally 305)
317 RWHP, 418 RWTQ
13.23 @ 107.62 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Member: SoCal F-Bodies
-=ICON Motorsports=-