Octane mixes???

[Pappillion]

What are you fellow sled heads running for octane levels and what mods are you running with them?

Trying to find that happy level without going pop.

As well, I have heard that there is a limit to octane levels that should be run before the engine is robbed of power. Any input would be great.

Thanks

 

[maxwell]

depeends on alot of variables like engine compression and ratio. but for me running nitrous and high compression and some other mods i use 5L of c111 with every tank of 91 octane premium. never had a problem. it is true that if your motor is not designed around running a raceing fuel it will be robbed of power.

 

[Pappillion]

depeends on alot of variables like engine compression and ratio. but for me running nitrous and high compression and some other mods i use 5L of c111 with every tank of 91 octane premium. never had a problem. it is true that if your motor is not designed around running a raceing fuel it will be robbed of power.

I ran a mix of C111 and premium 91 last year and dislike this due to the cost of fuel and having to mix it. My sled has a high altitude head running 13.5 to 1 compression and I have 135-140lbs on each side. Do you think that it would be beneficial for me to run strait 100 octane AV fuel or would I have to mix this as well? I am guessing this octane level would probably be a little high but it would solve both my problems if it would work without robbing power. I'm just looking for an opinion. I know I would need a engineer to figure out my setup.

Thanks for the help.

 

[DaveB]

14:1 on several motors over the years. Single pipe, trail porting. 50% AV gas, 50% Prem91 at home (2800-3000 feet). 30% AV gas, 70% Prem91 in Revy (6000-7000 feet)