what fuel?

[PMHOURS]

ok im running 20% nitro in my engines. was suggested to run 30% nitro, for more power. Will this damage my engines? Will i have to re-break in the motors? What is the better 30% fuel?

[Czech-it-Out Graphics]

no and no

30% will make more power, it runs cooler believe it or not, and its much easier to tune. Running 30% is better for your motors. Werks, Byrons, OD 30 are all good fuels

[PMHOURS]

Will I have to shim the head? If so how much? The manufacturer suggestes 20%- 30% fuel can be run.

[hansarvin]

It depends on what engine mostly. Most race .21s do not require it though (at least to my knowledge).

[Czech-it-Out Graphics]

for OS most guys add the included shim. If a motor needs a shim for 30 most mfg's will include it in the box. You can get away with it in all motors some have a little lower deck height though and it will be harder to tune withut the shim

[AddictedtoNITRO]

These guys told me the same thing so I tried it and have never looked back. 30 Byrons is all I run now. I run it in everything I own. Even a Trx 3.3 lol

[cheesecake]

yup switched to 30 percent and i will never look back also best move i could have made.