Is there any advantage to switching to the newest GM PROM for a 1990 IROC (has original stock PROM). What changes is the new one likely to make in the way the car runs? Thanks guys.

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1990 IROC 350
Mods: Too busy trying to make it run right to mod it.
Airfoil, Dynomax cat-back, MSD coil, 180 t-stat, Bald Eagle tires,
Hypertech fan switch, Accel 23# injectors, Holley AFPR, ported plenum,
Ported Daytona Yellow stock base, Moroso valve covers, other stuff,
Ruger P95DC, hot wife, new oil filter, thick rubber floormats, no cats.
18.0 @ 85MPH since I'm one big-a$$ MF
"It's better to have and not need than to need and not have."

 

Using the most current update is the best option. As the calibraions get time on them, if there is a problem GM revises the code, does the EPA song and sance and then releases the update. No you won't find a .1 sec in it, but drivibility might be better.

 

Can someone explain this to me? I'm a bit confused. Does this mean I should order a new PROM from GM for my car? Is this like a software update for the computer?

 

Yes.

When they released the cars when they were produced they had a stock PROM with it. Then later on, they realized that if they tweaked the stock PROM slightly, it made for an overall better drive.

I would reccommend getting the new revision of the stock PROM. Just like software for a computer - when it is first realeased it has bugs in it - the computer PROM does as well.

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1989 Chevrolet Camaro IROC-Z
L98 - 350c.i. TPI, rebuilt 700R4 auto w/shift kit, Dual catalyst Monza PaceSetter Cat-Back, SLP 1 5/8 Coated Headers, 3.23 Posi rear, Hypertech chip with 160stat, Under-Drive pulleys, AFPR, K&N's, !Air Box w/ Ram Air, moddified MAF, !TB Coolant, Spohn Dual Cat SubFrame Connectors, Alarm, Keyless entry, remote starter, 92 Z28 AeroWing, Brand New Paint (6/21/01)

Future: ZZ4 TPI w/EGR, T56, 3.42 or 3.73, Spohn strut tower brace and LCA's

1989 Chevrolet Celebrity Eurosport
2.8 MPFI, no mods
225,000 miles and still ticking!

More info and pics on my webpage:http://go.to/iroc-z

AOL IMer: GPA 0point0

[This message has been edited by L98IROCZ89 (edited September 02, 2001).]

 

Cool. Thanks man!