fuel change?

[wideopeninpa]

So I had my bike dialed in well for 93 octane and with 165psi on each cylinder I decided to change to a 50/50 mix with 120 and 93. Question is, do I need to rejet for this? I rode it today (first time since change) and it doesnt feel the same. Thanks for the help

Edited May 29, 2010 by wideopeninpa

[overrevtricky]

I'm sure u will need to go up some. When I switched to Avgas I had to go up 3 on the mains and one in the pilot.

[AKheathen]

wow, that's allot more than i did...and you will feel less power without the compression/timing to burn the higher octane

[wideopeninpa]

so, shoud I advance my timing or should I not be running a mix? motor is a 4 mil with FAST play port, 21cc domes. I have the timing set at +4. I am at 800ft above sea level. I am at 165psi on each side.

Edited May 30, 2010 by wideopeninpa

[firebanshee]

so, shoud I advance my timing or should I not be running a mix? motor is a 4 mil with FAST play port, 21cc domes. I have the timing set at +4. I am at 800ft above sea level. I am at 165psi on each side.

You need to run a mix.You can not compare jetting changes from av gas to race gas,they are different fuels.You wont notice more power by mixing race gas it will just keep you from destroying your motor.

[wideopeninpa]

the reason I switched to the mix was to prevent detonation, I didnt expect to have more power but I feel like I have less (with ass meter) I wasnt sure if this was due to jetting, timing or a combination of both.

[srp]

If you are looking for more power, look at oxygenated fuels and pick the fuel with the highest lower calorific value and the highest stoichiometric ratio. The higher lower calorific value will have the most energy and the higher stoichiometric ratio will burn a largest amount of air. Divide the lower calorific value by the stoichiometric ratio to find the best fuel when comparing fuel brands. You will have to call the fuel company's for this information. This works with or without being oxygenated.

[GrMeyer]