[killermach1]

I filled up with premium yesterday (93 Octane) and up loaded the 93 octane tune from Brenspeed. I had about 30 miles worth of 87 left in the tank. When I really push her up high the engine pings a bit. Will it take anothe tank full of 93 to get rid of this since I had some 87 left in it? If not I am switching back to the 87 tune because so far I am not noticing a huge difference between the two except for the annoying ping up high, and since most of my morning commute is spent going 80 ish in a 50 down shifting and passing people on a back 2 lane road I hate hearing the pinging when I am used to the normal engine music.

[MaverickMLFD371]

when you fill your car with a different octane rating, you want to be very close to 1-3 miles to empty, not 30.

[shamdoodie]

I had the same question as you and was worried about getting too low on gas before filling up with higher. I was worried that I would start sucking gunk out of the tank if I got too low.

Changing the tune on mine and filling up with 93 fixed not only my ping but also my stuttering popping upon deceleration. I have no plans to switch my tune back down to 87 again until I take my next 12 hour road trip. The difference in MPG and $0.20 a gallon isnt enough to stay off the 93

[killermach1]

I am still not sure if I like the 93 tune yet. The car feels less high strung more relaxed. i kind of liked the high strung nature I had before it is just sneaky fast now nothing really noticeable. I am going to give it a couple tank fulls and then try either the 89 tune or go back to the 87 tune. we'll see I'll post more...

[DarkCandy08GT]

Originally Posted by killermach1 I am still not sure if I like the 93 tune yet. The car feels less high strung more relaxed. i kind of liked the high strung nature I had before it is just sneaky fast now nothing really noticeable. I am going to give it a couple tank fulls and then try either the 89 tune or go back to the 87 tune. we'll see I'll post more...

This is what happens over time. The tune never feels the same as when you first install it. I have the Brenspeed also and i have the same experience with the tune realaxing after a week or so. I even tried reloading it with no avail. The first few days are the best going from stock.

[killermach1]

Originally Posted by DarkCandy08GT This is what happens over time. The tune never feels the same as when you first install it. I have the Brenspeed also and i have the same experience with the tune realaxing after a week or so. I even tried reloading it with no avail. The first few days are the best going from stock.

But it is not a relaxing in the tune I changed tunes from 87 to 93.

[DarkCandy08GT]

What is the difference in the 87-89-93 perf tunes besides the octane? Is the power different in different RPM ranges if it felt more high strung at 87?

[MaverickMLFD371]

Originally Posted by DarkCandy08GT What is the difference in the 87-89-93 perf tunes besides the octane? Is the power different in different RPM ranges if it felt more high strung at 87?

higher octane = more power

[qwik48r]

or..

higher octane = more timing before a rod bends/or piston diesnetagrates