I've building this car for some time, it's mostly stock other than long tubes, ported TB and CAI.
The tune I have is also mostly stock, other than things like delete rear 02s for headers, I'm getting some backfiring and was looking for guidance of any adjustments I should look to make?
I also noticed some Misfires on 3 and 8? I'm a newb to tuning but can navigate around HPT.
I've also never driven this except for in the driveway.
[normal start run.hpl 2002_Vette_modded.hpt
Attempt to figure out the misfires. Check plugs and wires, swap injectors around if you have too.
Past that install a wideband o2 sensor and start correcting the airflow model for the header/TB/Intake you installed. The MAF and VE should be your main things to work on before getting way into it.
2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.
If you don't post your tune and logs when you have questions you aren't helping yourself.
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