11:1 ok with 93 oct. gas?

[Bender]

I want to build a 416 that I can run 93 octane gas with. Is 11:1 compression ok for 93, or will it ping? Does a cam affect what octane you can use too(or just compression?)?

[Giz400ex]

I'm pretty sure you'll be ok. I think its when you get to 12:1 or more that you'll need race gas.

[NTPRacing#19]

a cam will not effect the fuel or anything with jetting. a cam just keeps your valves open longer and gives more top end

[Juggalo]

if a valve is open longer won't more air get in and more exhaust move out?

[NTPRacing#19]

yup more fuel and air will be let in and then more exhuast will be let out. then its usually a good idea to get a higher compression piston to compensate for the valves being open longer

[TRX_Thumper]

i have a je 10.8 comp Je with xr400 headgasket and mine wont run on 93...i mix one gallon of 110 to 3 gallons of 93...but wiseco's compression ratios arent correct so i dont think you will be as high as 11:1

[nakomis0]

Originally posted by TRX_Thumper
i have a je 10.8 comp Je with xr400 headgasket and mine wont run on 93...i mix one gallon of 110 to 3 gallons of 93...but wiseco's compression ratios arent correct so i dont think you will be as high as 11:1

Its only the Wiesco 440s that are incorrect.