My HS build

[rabbito]

Originally Posted by brushforhire

Going to just a higher octane and nothing else, will not give more power, on a stock yaris. Now if other things are changed and modified, that's a different story.

The only reason why a higher octane would give more power, is if the car was compensating for detonation, running rich. Since our cars are designed to run on lower octane, nothing happens by using a higher octane.

yes, running higher octane does not do anything but running higher octane, larger injector and advance timing or controling fuel does make a difference

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