93oct blended with e85

[boost97gst]

Im looking to get to 30psi and am finding out with my turbo its not happening on pump. So my question is, whats a good blend of e85? So i dont have to do a full tune-overhaul and completely switch to e85. I just want to get rid of the knock im getting around 25psi. Ambient temps are contributing obviously but i know with, im guessing here, a 30% blend or so of e85 i could churn out a few more psi and get some killer power out of it. Im flowing around 50lbs now but think theres another 10lbs id like to see.
I may just go ahead and do the full switch but i want to know if others run blends and the pros and cons of it.
Thanks guys

 

[KyleClyne]

https://www.google.com/#hl=en&safe=....,cf.osb&fp=aa499a16869e0be5&biw=1760&bih=873


Some of these might have relevant answers.