KJL

I have a stock 92 ZR1 and a performance chip that came out of my non stock 95 ZR1 that was ported and has aftermarket exhaust and headers. I am not 100 percent sure of what the chip enhanced, likely some of the typical stuff including turning the fans on earlier and enriching up the air/fuel mixture some.

Curious if this would hurt anything if I were to install it in a stock configuration. It ran fine in my 95.

A26B

You don't mention who made the modified prom. I would recommend that you go back to whoever made it to ask this question, since they are the only one who knows all of the modifications.

KJL

Unfortunately I do not. I ask Brandt (the previous owner) if he knew and he couldn't remember. The has SST on it but I believe that is regarding the type of chip, not the programmer. All I know is it was set up for a 95 ZR1 with mods noted above.

Jerry- I hear you also do work on ECM's. Do you do any work on just C4 LT-1 ECMs?

z06scentair

Guess you bought the red car that was in GA?

KJL

Yes I did.

z06scentair

Good for you Beautiful Car! Smokin Deal.....possibly the best deal of the year regardless corvette generation!

KJL

Yes, I am thrilled with it.

FASTAZU

KJL

Replaced the coolant tank yesterday and no more leaks, the overflow tank now works correctly.

Dominic Sorresso

The 95 chip is not compatible w the 92. The 95 could be used in 93-95 motors. The mods in the 95 chip could be "transferred" to the 92 but that would need to be done manually. However, since the 95 was modded, I don't think the values in that calibration would be of any real use in a stock 92. Most "performance" chips modify fuel and timing at WOT. Getting the tune right for all around driving etc. is much more involved and time consuming. Things like fans and fuel cutoff can be done easily but you'll need to be specific as to what you want for the 92.

KJL

Thanks for the input. I wont mess with it.

wfot

hey
do you still have the modified chip from the 1995? Did you want to part with it?
thanks
John

KJL

I still have it, my concern regarding parting with it is I know I can pass emissions with it. Not sure about my new chip.

mike100

You might do well to have somebody read your 95 chip to see what the ign timing map and any fueling that may or may not have been altered to see what features you might more or less duplicate on the 375 hp car.

If nothing else (since these cars run a little rich from the factory) hooking a chip up with a more performance oriented ignition curve, the valet key default to on, and lower temp fan settings will make for a better driving experience on something straight forward like a cat-back only car.

wfot

Send it to me I can read it and tell you whatever you want to know and send it back.

KJL

I still am not sure why it won't work in my 92. I am assuming from the responses that even if i moded the 92, it still would not work. This is a piggy back chip as well.

Dominic Sorresso

Calibration values and their addresses in the 93-95 bin files are different from those of the 92. There is a mismatch and so the ECM will not control the motor properly. It's the same for 90 and 91 calibrations if trying to utilize a different MY prom from the MY of the vehicle.

wfot

yes what he said. the 90, 91 and 92 all have to have a separate editor to read/write. the 93 to 95 are the same editor. the values are located in different locations and if different years are mixed together, the computer will not be reading the proper values for the many many different tables in there.

mike100

basically many of the tables are the same or similar, but a small added feature (like the egr) in the newer car's application to run the program skews the addresses in which the memory is written. So your 92 rom (burned chip memory) has pertinent information written at specific addresses and the 93-95 will have the same stuff written in other memory locations. So the programming editor has a definition file that points to the correct place in memory to store the data when you change it. That's why the 'chip' has to match the car, but the ecm's are all swappable.

Dominic Sorresso

One thing to remember is that the 93-95 ZRs were 405hp motors with changes to the cam profile and injector housing along w addition of EGR.
SO, its not a transparent swap even if it could be done. The VE and SA tables are different, as are ancillary areas of the tunes. There's really only one way to optimize the tune for YOUR motor and that's to have it datalogged and the tune modified based on that.