Just wondering if anyone knows if 91 will still work on an SLP head for an 07 800r when riding at 2000ft. I am pretty sure the head is there 6-8k one. Im thinking I may need to run some race gas to keep from detonating.
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throw a EGT gauge in it and find out the correct way!
Unfortunately, an EGT isn't the ticket to figuring out fuel requirement for a given engine/cr/timing variance. On my 800R with +2* timing, unable to run even a 12.5:1 head @ 2000' on premium pump without det sensor going off. if you are running thier 6-9000' head @ 2000', I'd probably suggest 50/50 pump/100ll to be safe as a starting point. If the octane level is excessive, your engine should tell you thru lower than normal power levels/rich feeling. Cheaper route than letting your engine tell you thru a deto'd piston/cyl...
Really? A EGT wont tell you if your detonating? hmm...lol