XXX Racing Fuel gains 14whp on stock 370Z
 

We had a chance to test XXX Racing Fuel’s new 138 oxygenated blend in our Nissan 370Z. After making a few pulls to get a consistent baseline on our 370Z (260whp), we added 5 gallons of oxygenated XXX race gas. The result was 274whp, an impressive 14whp gain.

XXX Race Gas Comparison Video:

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Source: Injected Performance

That's a really big gain from just fuel... Now with tuning... :drool:

By the way, how much does that new fuel go for per gallon?

Wow, now if only they would put that in at the local circle k

damn... im pretty surprised.. I ran stuff like this in my G37 once and told people i felt a difference.. they just called me stupid.. :rolleyes:

I ran 105 in my Trans Am and hardly felt the difference. But 14HP is a big gain.

well.. of course every difference is different. ^ id like to see an independent dyno on this stuff...

The biggest gain from running higher octane fuel is preventing knock. You won't gain more than 1hp from race fuel in the best of situations. That 1hp is probably just random standard deviation from the mean... Running race fuel doesnt give you magical hp, it just allows you to run more aggressive tunes with a little bit more of a safety margin.

Right. But ping/detonation is the key reason for hp loss... If they're making 332HP on 91-92 at the crank, then really, the motor is making MORE hp without detonation. So, yes, you're right, there's not REAL gain from it, but it is finding that extra hidden HP.

impressive

This is the first time ever that I've heard someone say that detonation reduces HP... The only reason you would ever get more HP out of race fuel is if you tune for it. The advantage of race fuel is that the higher the octane the more resistant it is to ignite prematurely. You technically could lose HP, but that is the last of your worries if your engine is knocking.


Might as well use this opportunity to help out the less technically inclined crowd who does't know what pinging/detonation/knocking is...

Engine knocking - Wikipedia, the free encyclopedia

For those of you who don't like to read and like things simplified. Here is the way I explain it: There are many causes for it, however in simplest terms knock is the premature ignition of the air/fuel mixture inside your engine/cylinders. Because it ignites at two different places within the cylinder, the shockwaves from the separate combustions smash into each other creating a "ping" sound. Sounds a lot like marbles bouncing around inside your engine. Unfortunately this produces a huge amount of stress on the internals of the engine...eventually one of them breaks.

Higher octane fuel, as I said, is harder to ignite and therefore more resistant to igniting prematurely.

Voila, now you know the point of race fuel.


EDIT: I see now that this fuel is oxygenated, I could see how it could theoretically produce gains. Why wouldn't all our gas be oxygenated? My best guess would be that the oxygen makes more power, however it also increases heat and stress therefore making it more prone to knocking. That is why this fuel also needs to be higher octane. It's a cool idea for a quick power booster...

Too bad they can't sell an additive.

I was looking at the initial post and saw that it was an Oxygenated blend. Which of course made me instantly think of the effect that NOS gives cars and that is mostly to put more oxygen into the whole combustion process. Which would of course make more HP. So Oxygenated gas should do the same thing as NOS on a more limited basis as you are not getting the same level of Oxygen as a NOS Shot.

Now your pinging issue would certainly come into play if they are not raising the octane of the fuel at the same time as raising the oxygen.

EDIT: thanks wilsonp for resurrecting this post so I could add my two cents to a Zombi Thread :facepalm:

I just leave my gas tank open so all the oxygen can flow in on its own.:tup:

"XXX new 138 oxygenated blend" AKA winter gas for snowbelt states. :D ;)