something seems off? looking for a second opinion

[LTZCrew]

hey, got my trucked tuned and after dealing with a few small issues i got Hp tuners for my self
looking at the tune i think i maybe got rooked?yukon.01.28.23.hpt

looks like all the timing adjustments where done in the low oct table? and i dont see any real fuel adjustments

granted I am a newb with this program and know just enough to be dangerous but doing a file compare to a stock tune Im not seeing much difference.
using a 07 escalade stock file to compare

my truck is a 07 yukon Denali
Basics of build
alumi 6.2
4.075 bore
9.5/75:1 compression
218/227 .600 cam
stock heads
stock injectors
1 7/8 headers no cats, stock muffler

[blindsquirrel]

Stock file from the repository, same engine & OS
2007 Yukon 1500 1GKFK63817J314905 6.2 A6 1376673403.hpt

Main things I see that were missed/skipped is Cylinder Volume was not updated, and VVE is completely untouched which might maybe be kinda sorta OK sometimes if it was a MAF-only tune like most of the quickie guys do, but it's not. Still MAF/VVE blended like stock so it's definitely using that VVE for more than just transients.

[LTZCrew]

could this lead into some idle/ starting issues? and feeling like this thing has no balls? im guessing having a bigger cam in it is going to throw those tables out to lunch?

[GHuggins]

A lot of your idle issues are in some of the changes made in the idle section. Power is most likely the timing and PE settings. Then of course all of the air models and what not being off. You could probably start over from stock and do better.

[LTZCrew]

woof :S

found a 376/480 tune file from a GM crate motor on the repository. wonder if that would be a closer starting point as its already got a hot cam accounted for vs fresh zero ?

[blindsquirrel]

Not really recommended. There is a lot of stuff in an ECM that you can't see in the editor's settings, and the GMPP/CPP stuff all uses E67 ECMs. The parts you can see that look like they'd work may not work with the other parts of the calibration you can't see (or change in HP Tuners).

And it's definitely a no-no to flash a file you found somewhere to your ECM, though you couldn't in this case because of E38 vs E67.

[LTZCrew]

noted. thank you
going to give from scratch a go. thought it may be worth using something like that as a reference

[kevin87turbot]

noted. thank you
going to give from scratch a go. thought it may be worth using something like that as a reference

Let me know if you need help dialing it in. I can get it fixed up for you.

[LTZCrew]

If you got some pointers id gladly take the advice. I know enough to be dangerous. Haha

[marksrig]

If you got some pointers id gladly take the advice. I know enough to be dangerous. Haha

Save your current tune AS FOUND and keep a couple copies on different drives or a USB.
I had the same issue when I started out. Had a pro tune and was curious what was done. Turns out he only adjusted MAF and never touched the VVE or timing.

I've since learned a ton and many of the guys here are great help.