Q16 or mrx01 ...

each has a very different octane. I like mrx01 but for spraying or very high CR the Q16 works very well.

You can also always give a call to the folks at VP Racing and they'll point you in the right direction. :beerchug:
 
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C-16 expect a slight power loss on motor or add a little timing. Stock motor and a 60 shot C-16 or Q-16.
 
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