What are you all paying for Sunoco Purple?

Michael Beard · 09-09-2011, 12:02 PM

What Alan said. There are more variables in fuel than just octane. Octane doesn't make power. Octane *allows* you to do different things with the engine that make more power. By itself, octane amounts to nothing more than "unburnable stuff", which allows you to run more ignition timing and/or compression without getting into detonation. Theoretically, the less octane the better, but again, you have to look at ALL of a fuel's attributes to determine it's efficiency and power potential in a given combination.

Here's an old chart that has a lot of different fuel properties listed... http://www.smithtex.com/racing/fuelcomp.html

09-09-2011, 12:02 PM	#7
Michael Beard VIP Member Join Date: Sep 2002 Location: Columbus, OH Posts: 4,060 Likes: 0 Liked 13 Times in 9 Posts	Re: What are you all paying for Sunoco Purple? What Alan said. There are more variables in fuel than just octane. Octane doesn't make power. Octane allows you to do different things with the engine that make more power. By itself, octane amounts to nothing more than "unburnable stuff", which allows you to run more ignition timing and/or compression without getting into detonation. Theoretically, the less octane the better, but again, you have to look at ALL of a fuel's attributes to determine it's efficiency and power potential in a given combination. Here's an old chart that has a lot of different fuel properties listed... http://www.smithtex.com/racing/fuelcomp.html __________________ Michael Beard - NHRA/IHRA 3216 S/SS