Custom tune issues?

[TX_Hunter]

Originally Posted by MidwesterneRR

Ok i had decided i expected too much but i think i have the same setup you do (07 5.4 373LS 4x4 and same hex, although i have an s&B CAI) and im sort of in the same boat. I say sort of because i have noticed gains but the differences from 87 tow(edge) to 87 performance(custom) were not what i was expecting, particularly b/c i got no more fuel economy. maybe this is related to our hex code? Dont get me wrong, im happy with my gryphon i just feel like from others responses i missed something

My truck is stock with the exception of a cat-back, and I have LS also. My truck drives better with the custom tunes, but I don't feel the performance/power gains I was expecting. My expectations were based solely on reviews and reports others had written. I saw some folks talking about breaking their tires loose, and even catching a tire scratch going to 2nd with a completely stock truck (auto trans) & custom 87 perf; I can go to the floor with my custom 87 perf tune and can't chirp the tires unless I'm on a steep incline (maybe the others didn't have LS, if that makes that much difference). Don't get me wrong, I'm not looking for a hotrod, and I don't drive my truck aggressively; just seeing what the tunes are capable of.

Anyway, it's all subjective and speculation unless I actually get on a dyno, which I can't ever seem to find time for.

I don't have anything negative to say about my tunes as only a dyno can tell the real story, and this is the first time I've actually talked about this with anyone other than Bill. As I said, I saw Rustler's post and got curious.

I didn't notice any fuel economy gains, but I also haven't watched it too closely as that would have been a fringe benefit for me; not the primary reason for getting tunes.

If I ever make it to a dyno I'll let you know what I find out after talking with Bill.