What type of fuel to run in a 2008 m8

[fersch69]

I Have a 2008 Arctic cat M8 with a timing key , MBRP can and a Speedwerx Y-pipe and also a 4'' air horn , and i was wondering if someone out there could tell me what octane is the best?I run 91 right now but there are alot of cat owners that say 87 is the best for that year.Any info out there would be greatly appreciated.Thanks

 

[WHATDAFOOK]

Minimum 91 octane...How many degree's is your key? If it's 3degrees or higher,i would consider a minimum of 94 octane below 3000ft... A stock M8 in that year was 87 octane..but with your y-pipe and key way...91 minimum at low altitudes..

 

[fersch69]

My timing key is a 2 1/2 degree.

 

[fersch69]

I take it to the mountains just about every weekend.Is the timing key a good thing to do?

 

[WHATDAFOOK]

Absolutely,that 800 engine loves timing advance..When riding higher elevations 91 octane is good...At elevations below 3000ft i would be tempted to run an octane boost,(just to be safe)..The timing is advanced the most before the power valves open and at WOT..The only time you have to worry about detonation is at those rpm's..

 

[fersch69]

Thanks Man.