Trouble with local gas and DiabLew Tune

[Tom________G]

I had my 2018 6.2L truck tuned by Lew about a year ago. Great service! However, I only have a few places in the Oklahoma City metro to get 93. So far, I have not found a station with 93 that is good enough to not cause a lot of knock retard. For the last year, I have basically given up on the tuning service I paid for and been running the canned tuned on the Diablo. However, I would really like to make this work. I have read some differing opinions on octane boosters, but I am wondering if I could run 93 plus a bottle of booster to make it not detonate early.

 

Any other suggestions as to how to combat this?

 

Any help is greatly appreciated!!

[durandetto]

I would get a hold of Lew and have him see if there's something he can tweak in the tune.

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[Flameout]

I've been using the 87 octane tune and was thinking about trying the 93, but now not so sure. I've often wondered about the quality and actual octane of todays garbage gasoline. (Where's the good ol' 100+ octane Sunoco 260 when you need it lol)

I haven't sent my log file to Lew yet, only because I was going to try the 93 tune but I guess I'll stick with the 87, at least for now. I know in my area evey station has 87 and 93 (and some 89 and 91) but I really have no idea if one is any better than the other

[L86 All Terrain]

Lew could probably just back off on the timing a bit to avoid predetonation. Have him make you a 91 tune. I think his rates are pretty decent for re-tunes. Time is money, nothing is free. Get it retuned before you melt a piston.  

[CamGTP]

"Tunes" should never be made to ride the edge of knock either. Tuning for knock, and backing off the timing is never the way to go but sadly that is how many do it because they think it's okay. Not saying that is how he does them but many places are like that.

 

Without seeing data logs or the file itself I can't comment on what may be the issue. I often see that it's either too much timing or they leaned the fueling out under power enrichment to get every ounce of horsepower instead of leaving it a little fatter where it would be safe forever.

 

So getting back in touch with him would be the best way to go.

[Jacoby]

8 hours ago, Tom________G said:

For the last year, I have basically given up on the tuning service I paid for

Why?

[Tom________G]

14 minutes ago, Jacoby said:

Why?

Honestly, I did not get the impression there was much I could do without better fuel. I probably should have asked some more questions in my correspondence with him. My main focus was tuning to protect from AFM issues, so I was able to do that with the canned tunes. I we I’ll get back in touch with him to see what other options we might have. 

[Tom________G]

I will also say that I was unaware of not being able to tune the TCM when I got my ‘18. Lew is obviously awesome, but I’m starting to wonder if it’s not worth going down the road of a new TCM module and tuning it as well. 

[Jacoby]

6 minutes ago, Tom________G said:

Honestly I did jot get the impression there was much I could do without better fuel. I probably should have asked some more questions in correspondence with him. My main focus was tuning to protect from AFM issues, so I was able to do that with the canned tunes. I we I’ll get back in touch with him to see what other options we might have. 

You need to reach out to him and tell him what’s going on. You’ll be hard pressed to find anything negative about Lew’s tunes or his customer service. He’ll have you run a log then send it to him and he’ll adjust your tune. He’ll get it running top notch in no time. 

[Jacoby]

7 minutes ago, Tom________G said:

I will also say that I was unaware of not being able to tune the TCM when I got my ‘18. Lew is obviously awesome, but I’m starting to wonder if it’s not worth going down the road of a new TCM module and tuning it as well. 

Tuning the 8 speed is a pain in the ass and a lot of folks don’t even fool with it and just do an engine tune.