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Old 04-27-2013, 04:11 AM   #1
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Default Maybe a stupid Race Gas question.

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)?
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Old 04-27-2013, 05:16 AM   #2
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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.
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Old 04-27-2013, 09:33 AM   #3
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Very cool! I presume I can use a standard switch? Thanks for building a cool ECU!
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Old 04-27-2013, 09:52 AM   #4
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Single pole, single throw on/off switch.
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Old 04-27-2013, 03:01 PM   #5
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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
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Old 04-27-2013, 06:25 PM   #6
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I hate your face. I wish I had 100 octane pump gas.
Thanks to those who voted...
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Old 04-27-2013, 09:02 PM   #7
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Meanwhile, we have e85 on every corner here
I'm not complaining
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Old 04-28-2013, 11:13 AM   #8
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Quote:
Originally Posted by 18psi View Post
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.
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