Miata Turbo Forum - Boost cars, acquire cats.

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-   DIY Turbo Discussion (https://www.miataturbo.net/diy-turbo-discussion-14/)
-   -   Maybe a stupid Race Gas question. (https://www.miataturbo.net/diy-turbo-discussion-14/maybe-stupid-race-gas-question-72437/)

dwink 04-27-2013 04:11 AM

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)?

Reverant 04-27-2013 05:16 AM

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.

dwink 04-27-2013 09:33 AM

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

Reverant 04-27-2013 09:52 AM

Single pole, single throw on/off switch.

18psi 04-27-2013 03:01 PM

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

thirdgen 04-27-2013 06:25 PM

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

18psi 04-27-2013 09:02 PM

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

Leafy 04-28-2013 11:13 AM

Quote:

Originally Posted by 18psi (Post 1005987)
Meanwhile, we have e85 on every corner here
I'm not complaining :party:

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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