Just after install, flash and tune, I had a few times it took a bit to start, but I haven't had any issues lately. It's in the upper 40's here today and I didn't have any issues with 60%.
Biggest issue with estimating Ethanol content is it can fluctuate 10% or better depending. 50/50 can range from 47% to 30%.
Originally Posted by Dmacc
I have about a 75% mix right now, I used to have trouble with start ups with 50/50, but ever since I got the pump upgrade, and the new flash from shiv, maybe he adjusted some cold start tables because my car starts up just fine like on 91 in 40* weather