8.6 & 2.5 pulley, 9.1 & 2.5 or 9.5 lower

[2010abmss]

Hey all I have a 2013 ZL1 M6 with rotofab and vmax TB, I want to add some more power. I'm looking at doing all the supporting mods ie. Headers, injectors, pulleys and tune. My question is I've been reading up on pulley sizes, I live in San Antonio where we have 93 octane can I safely run the 9.1 and 2.5 pulley combo? With the headers it will loose a little boost. Or would it be safer to run the 8.6 and 2.5. I dont want to compromise the blower by overspinning it. My other thought would be to get both combinations and run the 8.6 and 2.5 in the summer and 9.1 and 2.5 in the winter and have a tune for each one, or should I just go with a 9.5 lower and not even mess with the upper because it seems like a pain in the @ss to change. Bear in mind this is only a street driven car no racing just a little fun on the street and probablly never see the track, maybe once. Give me your thoughts! Thanks

[prdi]

with no cam i would do a 2.5/8.6 combo and do alot of them!!! if you decide to throw a cam in there then throw on the 9.1 ring.

[white ZL1]

Why do any of it if you have no interest in racing?
It would be cheaper and simpler to just do a 9.1 or 9.55 lower, and there's absolutely no need to have two pulley combos if you're not racing.

[BPG]

9.55 lower with supporting mods. Power in sig

[2010abmss]

Originally Posted by white 2SS/RS

Why do any of it if you have no interest in racing?
It would be cheaper and simpler to just do a 9.1 or 9.55 lower, and there's absolutely no need to have two pulley combos if you're not racing.

Its not that I wouldn't ever race it's just I dont have as much time as I used to. 2 kids and busy schedule i just want a fast street car. I dont mind putting a little money into the car thats not a problem I just want to know what would be the best option to maximize it for some fun. I appreciate your input though!