I'm certainly not bashing Bill or the product. I talked with Bill briefly about my concern when I first received my tunes, and told him that I would get on a dyno to see what was up...never got to it. Since I seemed to be the only one not jumping for joy over the performance gains of the custom tunes I chalked it up to unrealistic expectations and forgot about it. I noticed your thread here and decided to see what was up.

I replaced all of the canned tunes with custom, so I cannot compare the custom to canned any longer. And, I stopped running the canned tow tune a few weeks before I received my custom tunes due to transmission shudder. But, I do remember feeling that the canned tow tune would significantly out perform my custom 87 performance, although the shifting of the custom tunes blows the canned and stock tunes out of the water.

I was curious if we had the same HEX as I've read about some problems mine has caused with custom tunes. I'll step out of the way and let you get yours figured out.

Sorry if you took it wrong I didn't mean to imply you were bashing or your response / input was unwelcome.
We learn from each other too.

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 :shrug:

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.

TX_Hunter,
Please fill out your user info on the forum.
You will find it in the user cp tab.
Thanx
Lars

Update
 

Update,

I received and applied a tune update from Bill.
Actually I received the update 10 / 5 but didn't download and try it until this morning due to a brain fart on my end.

I feel a definite performance increase over stock and an overall positive performance gain over the previous custom tune.
I haven't had the chance to put many miles on it since the updated file was installed but I can understand why folks like their custom tunes.

I don't know at this point if future tweaks will be needed but you can remove me from the disappointed with custom tune category.

I wish I could change the title to something more appropriate like "Custom tune issues? "

John,

Since you are the OP, I've changed the name of the thread per your request. I'm happy that things are working better. Just keep me posted over the next week or so as to how they're holding up.

Take care.