av gas

Old 11-10-2010, 04:15 PM
Junior Member
Thread Starter
Join Date: Sep 2010
Posts: 13
Default av gas

does anyone know if aviation gas is oxgenated? I have ran it and had better 60 ft times than with sunoco 112. just curios if anyone might know or maybe this was a fluke that it ran better. I went back to the 112 and my time fell off
nutup is offline  
Old 11-10-2010, 05:34 PM
Senior Member
fla1976's Avatar
Join Date: Aug 2007
Posts: 1,523

AVGAS is usually 100 Octane. If your car slowed, it may be that your engine does not require 112 octane. What compression ratio are you running? A higher octane rating means the burn rate of the fuel is slower. A slower burn allows a more time to burn to prevent detonation. If your engine doesn't needing it , you can lose power.
fla1976 is offline  
Old 11-10-2010, 08:44 PM
Senior Member
jmarksdragster's Avatar
Join Date: Jul 2007
Location: Florida
Posts: 635

Not exactly true, the rating is a resistance to detonation, not burn speed. A higher octane may actually burn faster. Gas is a mix of hydrocarbon compounds, some evaporate early and some late. To give you an example, Track Tek 114 has an initial boiling point of 110˚ and a 100% evaporated point of 300˚. Track Tek 118, a higher octane, also starts at 110˚ but ends earlier at 250˚. There are also differences in specific gravity of fuels, which usually require a change in tuneup. When we ran it years ago, it liked to be a little richer than race fuel, if you are too rich with race gas it might explain it.
jmarksdragster is offline  
Old 11-17-2010, 03:10 AM
Senior Member
Join Date: Dec 2005
Location: Napier, New Zealand
Posts: 231

I'd say its the specific gravity thats the difference. Check out specific gravity on Google and it'll explain it best about needing bigger or smaller jets depending on the specific gravity.
chevyfireball is offline  
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -