Sled continues to shut off...knock sensor?

I installed a Boondocker gtx turbo kit on my 2015 polaris pro this fall. I am mixing 110 race fuel and 88 no ethanol. Had 4 successful rides, ran great. On the 5th ride, it died on me and I thought I hit the kill switch. I checked all the connections and nothing seemed out of place. It wouldn't start until after waiting about 10 min. It happened 4 times that ride. The engine light blinks as it is shutting down. I changed the ethanol fuel setting and took it out to see if that might be the issue. It was worse. Happened twice as often. The longer I waited to restart it the longer it would run without occurring again. When it dies, there is an enormous amount of exhaust. I am told this may be the knock sensor. Has anyone experienced this, any pointers on where to go next?
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