C6 Corvette LS2 with Eforce negative LTFT and bad fuel mileage

[Braketech]

I've installed a Edelbrock S/C on my LS2 and am using the supplied canned tune and my LTFT are -10 @ idle and cruising. I notice when their is a demand for fuel trim seem okay. My fuel mileage is around 320KM per tank (not on the blower at all) I use to get mid 400s. I'm curios to know if I can make changes to the idle and cruise sections of the Edelbrock canned tune. Not that is matters much but the DIC is way out it shows 13.7L/100KM
Thanks

[pannetron]

Posting your Edelbrock tune would help us understand your problems... As a guess, I'd expect the Edelbrock tune reduced your ignition timing advance. And your intake tract is now probably much different so re-calibrating the MAF may be needed.

[Braketech]

Sorry for my ignorance but are you asking for the actual file Edelbrock sent me or a data log ?

[kevin87turbot]

He's asking for the actual file that Edelbrock sent you. It would be helpful to see a datalog as well.

[pannetron]

I understand you may be reluctant to post Edelbrock's tune. If that's the case, you could compare it with your original tune to see what they changed and by how much and post that information.

[Braketech]

datalog1 idle.csv I can only upload this idle log for now, system will not allow me to upload Edelbrock cef. file. I have a log of 3,third gear pulls but file is to big to upload. I'm at work now I will do it later today.

[pannetron]

Ah, I forgot that Edelbrock supplies their tunes for a handheld tuner box. You'd have to read entire the Edelbrock modified tune from your ECU and compare that with the original tune in HP Tuners file format, .hpt. Did you save your original tune?

[Braketech]

Can I do the reading and programming using a MPVI2?

[NotSure]

Yes. What pannetron said.

I'm guessing that you may not have the stock cal in .hpt format? Did they give you injectors with the kit?

[Braketech]

Yes I have the stock file but it's in a cef. file as well, I believe Pannetron is asking me to pull the stock and Edelbrock file using hp tuner so it will be in a .hpt format. This is why I'm asking if the MPVI2 will be the right tuner to get me started? Yes they supplied 52LB injectors in the kit.
Thanks