100 Race gas

[socalrappy700]

I've had a really hard time finding 110 race gas out here but I just found a gas station that had 100 race gas on the pump.  What do you guys think about running it on my build.  All I know is kenz said to stick with race gas.

kenz 727
kenz 12.5:1 piston
kenz custom grind cam
kenz P&P
KDS +2 throttle body

[preddy08]

I bet you'd be just fine with 100. A couple weeks ago I had to mix 110 and 91 about 50/50 and it got me by. Not say I'd do it every weekend, but it worked.

Do you have a dyna?

Keep in mind that the 12.5 more than likely is'nt a "true" 12.5. Also if the Kenz grind cam is on the bigger side, that will help bleed off compression.

[socalrappy700]

Thanks Shawn, I was just about to PM you. 

[socalrappy700]

And no dyna

[Gunz]

I'm gonna have to second Shawn. If your super worried about it buy a plug and do a plug check on it. I'd think you'd be way in the ok with 100. 12.7:1 is where you need to start worry'n about the octane levels. Without a dyna your definitely ok. Tim was running 87 octane out at SL with us on his stage2, his cam, +3tb and 12.5:1.

[tonyrt44]

I used to run 97 oct pump gas on a 12:1 compression, so I'd say you are on the safe side with 100 oct gas

[Krandall]

I don't know if a plug chop would tell much. only if you're getting the right fuel/air mixture not if you're running enough octane, the only way you'd know is if you rode it hard w/ 100 and heard the motor pinging. It's a REALLLY obvious sound. Heard it on my bro's 440ex had to run race gas only.

[Colorado700R]

pre detonation will show up on a plug as a rich condition.  but sound will be you're first trigger