The Prom

[Corbusa]

Does any one make a Prom/ after market ? I should just explain what I'm wanting to do.. I'd like an extra prom for a spare .. Keep my factory one left alone and buy a spare to have calibrated for my upgrades. best way or what to buy?

[FU]

there are several people that are excellent at chipping..Marc Haibeck will do you right.

[WVZR-1]

You need go no further than Marc. Make note of anything you've modified or intend to do soon and he'll accommodate you no doubt. Do you know if you've got the "most current" updated GM PROM? Through the window on the blue cover there will be a code printed on a silver label. The most current is AYBK and part # 16163905. I might have an NOS of that. I assumed the car we're talking about is a '90MY.

[Dynomite]

Originally Posted by WVZR-1

You need go no further than Marc. Make note of anything you've modified or intend to do soon and he'll accommodate you no doubt.

Concur

I actually have two chips for each Corvette (87 Octane and 91 Octane) all modified by Marc Haibeck

[Hog]

Originally Posted by Dynomite

Concur

I actually have two chips for each Corvette (87 Octane and 91 Octane) all modified by Marc Haibeck

Do you manually swap chips, or do you use a "chip switcher" and switch between calibrations based on requirements?

peace
Hog

[Dynomite]

Originally Posted by Hog

Do you manually swap chips, or do you use a "chip switcher" and switch between calibrations based on requirements?

peace
Hog

I flip the ECM over and remove/replace chip as I most often use the 87 Octane chip in both the LT5s and L98

I do not switch chips that often and always disconnect negative battery cable first

[Corbusa]

I'll call Marc... also I see that 1990-1995 ecm's are the same ( this is what I read ) .That does mean 1990-1995 ZR1's not just corvettes Correct? a spare ecm would be nice also...

[XfireZ51]

Originally Posted by Corbusa

Does any one make a Prom/ after market ? I should just explain what I'm wanting to do.. I'd like an extra prom for a spare .. Keep my factory one left alone and buy a spare to have calibrated for my upgrades. best way or what to buy?

Really no reason to do that. You can always re-burn the chip w the original calibration as long as you have saved it on file somewhere. Once you do the mods, the stock chip won't be optimum anyway.

[Corbusa]

True XFire.... Can teh proms go bad? should I have2 and keep one in the glove box?

[XfireZ51]

Originally Posted by Corbusa

True XFire.... Can teh proms go bad? should I have2 and keep one in the glove box?

Anything can go bad but highly unlikely. At worse, you can use a daughterboard like Moates to sub for the OEM chip with a re-burn of the calibration. As for the calibration itself, that's already available from many of us anyway. A spare ECM is always a nice thing to have.