GNX prom in GN

[Boostmeister]

I understand the GNX prom was slightly different from the GN one.
Has anybody ever put a GNX prom in a stock or modified GN and what would happen?

 

[Nick Micale]

I put a Thrasher chip in a GNX and it ran LOTS better.

 

[MeanBuicks]

Nick,

I'm sure you've read the letter from ASC that came w/ every GNX. It says:

DO NOT USE AFTERMARKET PROMS (PROGRAMMABLE READ ONLY MEMORY) for your GNX, they may, in fact, cause a reduction in performance.

They were proud of their GNX calibration.

 

[Nick Micale]

Nope, never saw that Greg, and I guess the owner did not either!

 

[Boostmeister]

Thanks, but what I really wanted to know was would there be any performance gain or loss by putting the GNX prom into a regular Grand National.

 

[blackbuick87]

Why bother when a $25 Thrasher gives better performance then the GNX chip?

 

[Boostmeister]

I plan to do some fiddilin' and just want a heads-up. I have the acxa, bbjk and gnx chips. Which one would give the best performance without endangering the engine?

 

[chris]

Boostmeister

I was thinking about the same thing. From the responses, it looks like nobody really knows. Let us know of the results.

 

[Brooks]

Hi Boostmeister, would you happen to know what the broadcast code (ACXA, BBKJ, etc...) is for the GNX chip?

The gnttype page has several images for the Turbo 6 chips that GM put out over the years but not the GNX chip. I was wondering if you would be willing to read the chip and send the image to gnttype for posting on the page?

Charles Brooks

 

[BoostMasterK]

The image can be found here: http://www.buickgnx.com/files.htm

and I think the broadcast code is 7464 but I'm not 100% sure on that.

Mike [

 

[Boostmeister]

That's where I got the image from, but I haven't read it yet, so I don't know what is different in it. BTW does anybody know in a nutshell what changes were made as the chips progressed from the CMW0602, ACXA0942, BBJK9464, to the GNX (7464?)?