My HS build

[brushforhire]

Originally Posted by rabbito

sway bar do make difference, so does front tower strut...higher octane do make a difference...after i upgraded to E85 with larger injectors and ecu, i gained good 10whp+

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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.