I know it would be an OBD2 and most people (myself included) are using OBD1, but I wonder how their tables differ? Also, what did GM do with the EGR tables? Are they even there?

 

I can look at an LT4 program. Just let me know what you want to know.

Yes, the EGR tables are still there.

 

Very cool, thanks!

 

Looking at a 96 Corvette LT4 M6 file... From what I've been told, the Camaro SS LT4 files were identical to stock LT1 files. (according to INTMD8 who's the owner of one)
The EGR tables are no different from a regular file. The enable rpms are normal values, the only different thing being that the code for EGR is disabled. So I guess that's all as far as the EGR goes.

Besides WOT, the LT4 tune has generally less timing than a 96 LT1 Corvette tune. At 100KPA, there is a 2 degree advance over the LT1 tune from 3600 to 6000 rpms. (so 35 compared to 33)

The injector value is obviously different (because unlike the SS LT4s, the Corvettes had larger injectors. So 26.987 lb/hr.
The WOT AFR curve is also different.

If you need even more detailed information, I can export the tables directly for you.

 

Yep, I can definetely confirm it now. Both LT4 Firehawks and SS ran stock LT1 files.
I just checked it with the VINs of real LT4 cars...

 

Wow, thats pretty interesting. I wondered about the EGR set up because of the OBD2 testing I have to deal with here. VIN specific no doubt about it. Oh! I would really like to see that WOT AFR curve, as well as the timing tables. Man that would be cool if you would export that file. Email: danman@doctor.com
Thanks again.