I run Stillen's canned HFC map -> That is probably what you are calling 'aggressive'. I run 93 octane.
I was traveling & worried about running 91 octane. When I was stock, running 91 would dramatically effect performance.
When I filled up with 91 on my trip (had only 1/6 tank of 93 in there) --> I swear the Z ran BETTER.
I know this is a late post to your question, but I think Stillen tunes them for 91 octane.
That experience has got me thinking hard about a custom tune.
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GTM STAGE II TT, EXTERNAL WASTEGATES, FI 3" TDX, BLITZ EBC, SZ HIGH 5, FI 500E FUEL RETURN, WALBRO 525, ID1050, ZEIT FLEXFUEL E85, SD TUNED with ECUTEK by SEB, SZ HIGH 5 CLUTCH, 2014 NISMO GUNMETAL WHEELS, 2015 NISMO FRONT, REAR, & SIDE SKIRTS
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