octane level?

[roundsy]

alright i was just wondering what you guys out there are running for an octane level on a stock 06 er...also if some had played around on the dyno and found the peak performance octane level...thanks

[N300exJ]

If the engine is all stock all you need is premium pump gas. I know that having a sparks racing engine kit(04/05 450r's) with the 12:1 piston you can still run pump gas. Any compression ratio higher than that and youll need 105 or 110 octane race fuel. So i think its safe to say a stock 06 with the 12:1 piston will run perfectly on premium pump gas. Race fuel would be a waste. Or can someone prove me wrong?

[bwilson624]

I have an '06 450er and run only 93 octane. It runs great, but I don't think you'll see a performance change until you go with higher than 12:1 compression. Just stay with premium, whatever it is in your state, even with the HRC kit, it should be what you need.

[angry450r]

not saying Im proving you wrong but if the timing was adjsutable like and aftermrket cdi and if you could increase the charge of the spark(bigger,longer spark) yeees higher octane would help.

[450rJam]

Im running 91-93, its the best I can get around here and it runs great.
a little motor noise but nothing compaired to my 250r and seems they are all a little loud with the bumped compression for 06.

[GIXXER1KR]

Unless you bump up the compression and advance the timing you will be wasting money.With gas prices the way they have been pump gas does me well.Although i miss the smell of the VP!!!

[chad502ex]

octane requirements is defined by the amount of dynamic compression ratio and not the static compression ratio.

setting the bar at 11:1 or 12:1 static CR for pump fuel is not ideal.

In other words, you can run 14.5:1 static CR on pump fuel if you have a huge top end cam with high overlap. The more overlap a camshaft has, the lower the Static CR. Static is not as important in determining octane requirments since static implying an engine that isn't running. Dynamic CR calculations is determined when the intake valve closes BTDC on the compression stroke.