89 octane vs. 104 or 110 octane
 

I recently found out the low 11 second "Pure Street" cars run on 110 octane gasoline. How much more power could I expect if I "set up" my Mustang to run on a higher octane gasoline like 104 or 110?

Those cars your looking at (maybe mine?) are surely running a bit more compression. A stock stang is 9.0:1, mine is roughly 10.75:1.

If you are stock, 93 is the best you can pump, very high octane is for higher compression motors, or power adders cars.

Honestly, in my street stang, I run the cheap 87, and am still spankin' high end chevy's, etc.

High octane burns slower, thus, smoother, lower octane burns quick, BANG, thus, actually, theoretically, quicker.

I am on my 9th Miller Lite though.........:D

:D :D What a coincedence, im about on my 6th miller lite, what were we talking about? oh yea, octane, i run a little vp 99 just to be safe from detonation, being my timing is at 16*in, but 93 never fails me, and i remember my fastest timeslip on street tires was ran on 87 octane.;) timing was at 12-14

Al-
Octane equals burn rate. The lower the octane, the faster the burn rate. For performance, you want the quickest burn rate you can use without detonation. In otherwords, the lowest octane you can use without detonation is the best to use. Using a fuel with a higher octane rating than you need will actually slow the vehicle down. Mods that cause detonation, therefore, require higher octane. Advanced timing and increased compression are the two most common mods that create detonation. While advancing the timing will help a little bit with performance, increasing the compression will help alot. If you have 110 octane fuel at your disposal, 13:1 compression is easily attainable, and 14:1 isn't out of reach. Compression this high will greatly increase performance, but will hinder drivability. Also, keep in mind that once you install high compression pistons, you ALWAYS have to run high octane fuel.

Take care,
-Chris