Talked to 5 star the 100/100 is at the very top end which is what I expected looking at the chart. It's more like 40hp and 10tq for normal daily driving for the 87 tune. 93 tune was a little higher but not much on the low end. Gains are more on the upper part of the RPM band.

I do tow and haul stuff so bottom end is more of my focus. I am sure the increased throttle response they add makes it feel like more power gains down low though.

Any feedback if the tunes are work it for the low end too? Not looking to change the IC either.

 

Been running a 5 Star 87 p/t tune on my 2015 almost since I bought it. My main "want" was to get rid of the abysmal "get it into the highest gear as soon as possible" OEM shift strategy. I have been completely happy with the 87 tune. If I want to play around on the 87 tune I just go to Sport mode for the better throttle response and slightly more power.

I got 3 tunes when I purchased. I got an 87 eco tune I thought I might run on extended highway trips, but found it didn't make any significant mpg difference from the 87 p/t tune. The other tune I selected was a 91 p/t because 93 octane is limited in availability, and I didn't want to have to swap tunes if I was on a trip and 93 was not available. I ran the 91 tune for a while and didn't feel a significant power increase over the 87, so I decided to run the 87 p/t for everyday driving.

I would be even more inclined to buy a tune if I had the 10 speed transmission.
​​​​

 

when premium crossed $4/gal I went back my 87 tune (mpt), its still a significant upgrade over stock for the trans tuning alone. The extra power is definitely noticeable

 

100% recommend the tune. I had 5 Star 93 Perf/Tow on my 2013 5.0 and now 93 Performance on my 3.5 EB. Power difference is felt at all ranges of the powerband. Shifting strategy is noticeably improved.

 

I had a 5 star tune and ran the 87. I actually had them make modifications to the tune so I could keep economy a little higher than 15mpg. It was also a little harsh for me going in to R or D from Park. They modified that as well for me. I love the tune otherwise. Very smooth. I'll be upgrading the intercooler at some point with the hot and cold side piping. I sometime run 93 gas on the 87 tune and notice a difference in response. I don't always run 93 though, it just depends on where the prices are at the time of the fill up.