Hello everyone; new to the board. I finally managed to purchase an Evo X... took a while for it to come to Canada and now it's all broken in and roaring to go..literally.

My question is a little silly but I am very curious, I managed to acquire 114 Octane racing fuel from a friend of mine. There are 10 liters sitting around in my shed
Now I have a general idea of what might happen if I was to try pouring it in, however I might as well ask here. Is there any chance I can run on it or at least mix it with Premium without having my engine being severely damaged?

 

sure you can run it but why would you without mods or a tune? Only damage would be if it were leaded, your o2 sensor would foul after a while

 

^ +1

There is no reason to run 114 octane unless you are tuned for it or knocking like crazy. If you are stock, you're already rich enough as it is. I'd say save it for when you get some mods, and get a tune for it! You'll have a blast!

 

Welcome to the site.

I would not run the 114 octane in your X. You will loose power as you are not tuned for it. It burns slowers and has not benifits for a stock car. I would look into an intake and a exhaust first.

Good Luck!

Evan Smith

 

Burns slower...? It was my understanding that it burns at the same rate, it just takes more energy to get it ignited.

 

If that was true then you would need a better ignition system to ignite the fuel, which you dont.

Race fuel depending on the type generally is colder and burns slower, therefore needing to be tuned and adding more timing to get it to burn as fast as pump gas. So you can run more timing and more boost without the fuel heating up and preigniting (predet) making more power

 

I am pretty sure that race gas burns at the same rate as pump. I know that the higher octane allows the fuel to withstand higher combustion chamber pressure and the heat that goes along with it, but that is not because it burns slower, it is because of the octane enhancers within the fuel.

 

Basically the higher octane is harder to ignite. It still burns at the same rate though.

 

Slower to burn in theory, not in actuality. Since we are getting more in depth, we need to understand the difference between detonation and deflagration. Octane rating only tells us one thing: the fuel's resistance to detonation. And detonation resistance does not directly correlate to burn speeds (again, refer to detonation vs. deflagration: they are two completely different forms of combustion). Octane rating tells us absolutely nothing else: not burning speeds, not energy content, not engine temperatures, etc etc. High octane gasolines are harder to explode (i.e. detonate) they are not harder to burn or ignite (i.e. deflagrate).

On a forced induction motor the lower compression causes fuels to have a slower deflagration (burn) initially. With more boost & timing in theory, increases deflagration. So on a stock evo with a stock tune, deflagration is techinicaly slow and mild. Therefore with race fuel no additional power will be seen with out increasing the rate of deflagration. You can increase deflagration (burn) and the speed deflagration can happen with more boost and or timing, but to do so you need the higher octane to prevent detonation.

So in theory race gas in a stock evo has a deflagration slower than what it can really handel. Not necessarily that race gas burns slower, but that it can handle a faster burn by not detonating allowing for increased power. We say "slower to burn" as its easy to understand that way. In reality it burns near the same rate as pump fuel but in order to see the benifet of the higher octane it needs to be burned bigger hotter and faster.

OP
114 Octane is leaded fuel. Other than damaging your sensors, it will not make an improvement in power in theory it will make your car slower. You need to tune and have the mods to be able to run it. Look towards 100 oct as it is a more streetable fuel for the everyday user. Good Luck

 

lol Getting back on topic, you can mix it if you want, the lead in the fuel will still cause damage to your sensors. If I were you, I would go get a custom tune for the 114 octane. Before you do that though, make sure you break in the car properly!

Have fun!