10° This week. e85 or 93

[w00t692]

Originally Posted by Luckrider

Winter blend is certainly not e60 to e70 as all pumps around here (the few that we have) say 70% minimum. I myself have not been having major issues, but I have been working on making cold starts better for people with higher e% fuels.

As far as atomization is concerned, that isn't the problem, the problem is the flash point (the temperature at which the fuel turns to vapor) of e85 is way higher than gas.

Winter blends are most certainly lower mixtures of ethanol. And you know what, you're right, that's what i meant. The temperature that ethanol evaporates is much higher than gasoline, resulting in no start conditions are much higher temperatures than gasoline can start in.

I actually believe the reason for that variance sticker is specifically winter conditions.

[Luckrider]

Originally Posted by w00t692

Winter blends are most certainly lower mixtures of ethanol. And you know what, you're right, that's what i meant. The temperature that ethanol evaporates is much higher than gasoline, resulting in no start conditions are much higher temperatures than gasoline can start in.

I actually believe the reason for that variance sticker is specifically winter conditions.

Correct, it is lower, but not e60 lower. With the harder starting issues, we increase the Injector Pulse Width (the amount of time that the injector sprays fuel each combustion stroke) so that there is more gasoline in the engine to get it going. I think one issue that people who are working with this are having is that they end up overdoing the compensation and flood it a little. I believe that is what is keeping my changes from being the best that they can and I am still working on making it better.