Hey all- I have assembled all of the parts to start my (2nd) turbo build.

I am fortunate to have 1 VP Racing gas station with pump 93 (big deal out west) and 100 pump gas. I am new to megasquirt, but 100 octane is only useful to allow more timing, right?

The question- I don't mind spending the $$ for 100- but is it easy to load a 91 octane tune if I get stuck outside of home and can't get 100 (or 93 for that matter)?

 

Your ECU supports switchable maps.

This means you can select between two sets of fuel/timing maps with an external switch - no laptop needed.

Obviosuly, you will need to tune for both 93 and 100.

 

Very cool! I presume I can use a standard switch? Thanks for building a cool ECU!

 

Single pole, single throw on/off switch.

 

yep. map switching is awesome. make 2 tunes and you're set. though they will be very similar, one will just have way more timing and boost

 

I hate your face. I wish I had 100 octane pump gas.
Thanks to those who voted...

 

Meanwhile, we have e85 on every corner here
I'm not complaining

 

Its popping up more and more here. Now its only 10 miles away. Totally feasible to a racecar or a daily with a E sensor and a real flex fuel tune.