2014 C7 427 LT1 forged and sleeved

[Peng]

Hi all, I'm having some issues with low end drivability and high fuel consumption. I can feel and hear it pulling timing cruising at highway speeds and especially stop and go. I don't have a log available but here is my tune file if anyone would care to look it over for me. I found the high torque gain had values in it so I zeroed it all out and the drivability is tons better but still having timing issues on low end cruising along with stop and go.

The file will be the original file from my tuner without any alterations from me.

Another thing to note is that every time when I cold start the car it surges heavily unless I tap the accelerator or it switches loops.

2014 C7 427 LT1 forged, sleeved, FLEX fuel, 103mm Katech throttle body, holly high rise, unknown cam specs, (supposedly LT4 injectors and hpfp but tuner says it isn't so I'm assuming it's still LT1 setup)

[edcmat-l1]

LOL you have to know exactly what injectors are in it. You can't just guess or assume.

[Peng]

he told me the injectors didn't take any of the changes other than for LT1 so i'm just going based off what he said

[96GS007]

Your tuner gave you a shitty barely functional MAF only tune. I did a compare to a 2019 LT1 Vette and the VVE table is identical. I did a quick peek at the airmass side of the VTTs and those tables are stock. The MAP side likely is as well but I stopped looking. The MAF curve needs smoothing. He did cheat with cranking airflow and did a global VE change to 80%, probably to get it started

At idle you need to work the External Load table and the Speed Control Reserve. Looks like it needs some Spark Advance work for the part throttle/low rpm areas.

No logs, unknown cam, and questions around the injectors = guessing game.

I'd ask for my money back.

[Peng]

I confirmed that my injectors (12683517) and HPFP (12694529) are LT4. Did some research but could not confirm what flow rating the injectors are.

I've talked with the owner of this shop and the tuner about the issues with my car so either I get a proper speed density tune or I get my money back. I should've just gotten my money back and find another tuner but I'm the type of individual to give a chance for people to redeem themselves as I would like to prove myself to others that I'm capable of what I'm doing... especially since this tuner has been established at for over 10 years with record holding cars. There should be no excuse as to why he can't tune my car.

[C7Booster]

They are 140.7 lb/h. Just grab a C7 z06 tune file from the repository and copy over the injector and HPFP data. On the injectors make sure to copy over the tables axis as well if they differ.